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DE-102025145108-A1 - Device for motion control

DE102025145108A1DE 102025145108 A1DE102025145108 A1DE 102025145108A1DE-102025145108-A1

Abstract

The present device provides a motion control device for damping a push-button latch in both the opening and closing directions. The device comprises a base housing, a damper comprising a damper housing and a piston capable of being housed within the base housing, the piston being attached to the base housing and the damper housing being movable relative to the base housing between an open position and a closed position, a first spring and a second spring each capable of biasing the damper housing towards the open position, and means for releasably securing the damper housing in the closed position, the first spring being located within the damper housing and the second spring being located within the base housing and outside the damper housing.

Inventors

  • David Pecar

Assignees

  • TITUS D.O.O. DEKANI

Dates

Publication Date
20260513
Application Date
20251103
Priority Date
20241112

Claims (20)

  1. A device for motion control for damping a pressure latch in both the opening and closing directions, the device comprising: a base housing, a damper comprising a damper housing and a piston capable of being housed in the base housing, wherein the piston is fixed relative to the base housing and the damper housing is movable with respect to the base housing between an open position and a closed position, a first spring and a second spring, each capable of biasing the damper housing towards the open position, and means for releasably securing the damper housing in the closed position, the first spring being located in the damper housing and the second spring being located in the base housing and outside the damper housing.
  2. Device for motion control according to Claim 1 , wherein the means for releasably securing the damper housing in the closed position comprise an engagement unit in the damper housing, wherein the engagement unit is separable from the piston and is designed to engage with the damper housing, wherein the first spring is attached to the engagement unit.
  3. Device for motion control according to Claim 2 , wherein the means for releasably securing the damper housing in the closed position comprise a pin attached to the engagement unit and a raceway attached to the damper housing, or vice versa.
  4. Device for motion control according to Claim 3 , wherein: the pin is engaged with the raceway when the damper housing is in the closed position, and the pin is either engaged with the raceway or not engaged when the damper housing is in the open position.
  5. Device for motion control according to Claim 2 , wherein the first spring is a compression spring capable of acting between the damper housing and the engagement unit, and wherein the second spring is a compression spring capable of acting between the damper housing and the base housing.
  6. Device for motion control according to one of the Claims 1 until 5 , wherein the piston comprises: a piston rod and a piston head arranged in the damper housing and connected to the piston rod, the piston rod extending out of one end of the damper housing and attached to the base housing.
  7. A device for motion control for damping a pressure latch in both the opening and closing directions, the device comprising: a base housing, a damper comprising a piston assembly and a damper housing capable of being housed within the base housing, wherein the damper housing is stationary relative to the base housing during use and the piston assembly is movable between an open position and a closed position relative to the base housing, a first spring and a second spring, each capable of biasing the piston assembly towards the open position, and means for releasably securing the piston assembly in the closed position, the first spring being located within the damper housing and the second spring being located within the piston assembly and outside the damper housing.
  8. Device for motion control according to Claim 7 , wherein the means for releasably securing the piston assembly in the closed position comprise an engagement unit in the damper housing, wherein the engagement unit is separable from the piston assembly and is designed to engage with the damper housing, wherein the first spring is attached to the engagement unit.
  9. Device for motion control according to Claim 8 , wherein the means for releasably securing the piston assembly in the closed position comprise a pin attached to the engagement unit and a raceway attached to the damper housing, or vice versa.
  10. Device for motion control according to Claim 9 , wherein: the pin engages with the raceway when the piston assembly is in the closed position, and the pin is either engaged with the raceway or not engaged when the piston assembly is in the open position.
  11. Device for motion control according to Claim 8 , wherein the first spring is a compression spring capable of acting between the damper housing and the engagement unit, and wherein the second spring is a compression spring is, which is functional, to act between the damper housing and the piston assembly.
  12. Device for motion control according to one of the Claims 7 until 11 , wherein the piston assembly comprises: a piston housing, a piston rod and a piston head arranged in the damper housing and connected to the piston rod, the piston rod extending out of one end of the damper housing and being attached to the piston housing.
  13. Device for motion control according to one of the preceding claims, wherein the piston housing includes damping fluid, wherein the damper housing is sealed in such a way that the damping fluid is designed to flow past the piston head but not out of the damper housing.
  14. Device for motion control according to one of the preceding claims, wherein the basic housing comprises a substantially cylindrical body and wherein the damper housing, the first spring, the second spring and the detent mechanism are substantially coaxial in the cylindrical body.
  15. Device for motion control according to one of the preceding claims, wherein at least one section of the locking mechanism is located at least partially within the first spring.
  16. Device for motion control according to one of the preceding claims, wherein the damper housing comprises a first plug and the raceway or pin is attached to it.
  17. Device for motion control according to one of the preceding claims, wherein the pin is positioned substantially parallel to the first spring.
  18. Device for motion control according to one of the preceding claims, wherein the damper is a linear damper.
  19. Device for motion control according to one of the preceding claims, wherein the engagement unit comprises means for preventing rotation with respect to the base housing.
  20. A device for motion control for damping a pressure latch in both the opening and closing directions, the device comprising: a damper comprising a piston assembly and a base housing, wherein the piston assembly is movable relative to the base housing between an open position and a closed position, a first spring and a second spring, each capable of biasing the piston assembly towards the open position, and means for releasably securing the piston assembly in the closed position, the first spring being located in the base housing and the second spring being located in the piston assembly and at least partially outside the base housing when the piston assembly is in the open position.

Description

Field of invention The present invention relates to devices for motion control and in particular, although not exclusively, for furniture components such as sliders and doors. background One type of motion control device is a push-to-open catch. These devices are generally attached to doors and sliding doors of furniture. During use, an operator would push the door or sliding door, thereby activating a push bar located within the catch. The catch then opens the door or sliding door slightly, allowing the operator to insert their fingers behind it and complete the opening process. Push-to-open catches are popular because they eliminate the need for handles on the outer surface of the door or sliding door. Pressure-activated snap fasteners with damping are well-known, such as... US 5518223 A1 However, it is desirable to minimize the length of a push-fit latch to allow its installation in or on cabinets/units without compromising the structural integrity of the cabinet/unit. WO 2021/233657 A1 shows another well-known arrangement. One problem identified as impairing the function of push-to-open latches lies in their behavior when not operated as expected. For example, on a cabinet with two doors, once one is open, it would be easy for the user to simply pull the other door open instead of pushing and activating its latch. The latch would then remain in its "closed" position, and if the door were subsequently closed, it could strike the latch in such a way that it is activated, causing the door to open again instead of remaining closed. It is desirable for the latch to behave when the door is closed in a way that is independent of whether the door was opened by pushing or pulling. Brief description of the invention The present invention provides a short-length push-to-open catch with a damper housing, a detent mechanism, and two springs, preferably coaxially aligned. This arrangement provides a motion control device for damping applications such as furniture doors, sliding doors, slides, lifts, etc., in the opening direction. It ensures that the push-to-open catch, regardless of whether the corresponding door, slide, or the like was previously opened by pushing or pulling, can enter and remain closed upon closing without causing the door to recoil. In particular, the use of two springs in different areas of the push-to-open catch and a piston-pin arrangement in two separable parts of the device allow it to function normally as a push-to-open catch when the door is opened by pushing and as a damper (during the closing thrust) when the door is opened by pulling. According to one aspect of the present invention, a motion control device for damping a pressure latch in both the opening and closing directions is disclosed, the device comprising: a base housing; a damper comprising a damper housing and a piston capable of being housed in the base housing, wherein the piston is attached to the base housing or stationary relative to the base housing during use, and the damper housing is movable between an open position and a closed position with respect to the base housing; a first spring and a second spring, each capable of biasing the damper housing towards or into the open position; and means for releasably securing the damper housing in the closed position, wherein the first spring is located in the damper housing and the second spring is located in the base housing and outside the damper housing. Preferably, the means for releasably securing the damper housing in the closed position comprise an engagement unit in the damper housing, wherein the engagement unit is separable from the piston and is designed to engage reversibly with the damper housing, wherein the first spring is attached to the engagement unit. Preferably, the means for releasably securing the damper housing in the closed position comprise a pin attached to the engagement unit and a raceway attached to the damper housing (or vice versa); in other words, the means comprise or are a pin-raceway mechanism. Preferably, the pin engages with the raceway when the damper housing is in the closed position, and when the damper With the housing in the open position, the pin is either engaged with the track or not. Preferably, the first spring is a compression spring (a spring that can be compressed to a length smaller than its natural unloaded length and, in this state, will tend to expand due to its own restoring force) capable of acting between the damper housing and the piston, and the second spring is a compression spring capable of acting between the damper housing and the base housing. Preferably, the piston comprises a piston rod and a piston head arranged in the damper housing and connected to the piston rod, the piston rod extending from one end of the damper housing and being attached to the base housing. According to a further aspect of the present invention, a device for motion control for damping a pressure latch in both the opening and closing dire