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EP-4737743-A1 - A SCREW JOINT ARRANGEMENT AND A DEVICE COMPRISING AT LEAST ONE SCREW JOINT ARRANGEMENT

EP4737743A1EP 4737743 A1EP4737743 A1EP 4737743A1EP-4737743-A1

Abstract

A screw joint arrangement comprising: a first member (100) provided with at least one screw receiving portion (101); a second member (200) provided with a bore (201) comprising a first threaded bore portion (202), a second threaded bore portion (203), and a non-threaded bore portion (204) separating the first threaded bore portion (202) and the second threaded bore portion (203); and a screw (300) comprising a screw head (301) and a screw shaft (302) provided with a threaded screw portion (303). The first member (100) is arranged next to the second member (200) with the first threaded bore portion (202) being proximal to the first member (100). The screw joint arrangement is settable, by rotation of the screw (300), between a first state in which the second member (200) is fixed relative to the first member (100), and a second state in which the second member (200) is movable relative to the first member (100). In said first state, one of the at least one screw receiving portion (101) and the bore (201) are aligned, and the screw shaft (302) extends through said one of the at least one screw receiving portion (101) and into the bore (201) with the threaded screw portion (303) engaging the second threaded bore portion (203) such that the first member (100) is clamped between the screw head (301) and the second member (200). In said second state, the screw shaft (302) extends through the first threaded bore portion (202) and the threaded screw portion (303) (302) is positioned in the non-threaded bore portion (204) of the bore (201).

Inventors

  • ANDERSSON, KARL

Assignees

  • Axis AB

Dates

Publication Date
20260506
Application Date
20241101

Claims (14)

  1. A screw joint arrangement comprising: a first member (100) provided with at least one screw receiving portion (101); a second member (200) provided with a bore (201) comprising a first threaded bore portion (202), a second threaded bore portion (203), and a non-threaded bore portion (204) separating the first threaded bore portion (202) and the second threaded bore portion (203); and a screw (300) comprising a screw head (301) and a screw shaft (302) provided with a threaded screw portion (303), the first member (100) being arranged next to the second member (200) with the first threaded bore portion (202) of the bore (201) of the second member (200) being proximal to the first member (100), and the screw joint arrangement being settable, by rotation of the screw (300), between a first state in which the second member (200) is fixed relative to the first member (100), and a second state in which the second member (200) is movable relative to the first member (100), wherein, in said first state, one of the at least one screw receiving portion (101) of the first member (100) and the bore (201) of the second member (200) are aligned, and the screw shaft (302) extends through said one of the at least one screw receiving portion (101) and into the bore (201) with the threaded screw portion (303) engaging the second threaded bore portion (203) such that the first member (100) is clamped between the screw head (301) and the second member (200), and wherein, in said second state, the screw shaft (302) extends through the first threaded bore portion (202) of the bore (201) and the threaded screw portion (303) of the screw shaft (302) is positioned in the non-threaded bore portion (204) of the bore (201).
  2. The screw joint arrangement of claim 1, wherein the non-threaded bore portion (204) of the bore has (201) a first length L1 and the threaded screw portion (303) of the screw shaft (302) has a second length L2, the first length L1 of the non-threaded bore portion (204) being greater than the second length L2 of the threaded screw portion (303).
  3. The screw joint arrangement of claim 1 or 2, wherein the first member (100) comprises two screw receiving portions (101) and wherein the second member (200), in said second state of the screw joint arrangement, is movable relative to the first member (100) between a first position in which a portion of the screw shaft (302) is positioned in one of said two screw receiving portions (101) and a second position in which the portion of the screw shaft (302) is positioned in the other of said two screw receiving portions (101).
  4. The screw joint arrangement according to claim 3, wherein each of the two screw receiving portions (101) is provided with a lateral opening (103) and wherein the second member (200), in said second state of the screw joint arrangement, is movable relative to the first member (100) between the first position and the second position by rotation about an axis.
  5. The screw joint arrangement according to claim 4, wherein the first member (100) comprises a peripheral portion comprising a first C-shaped section (104; 107) and a second C-shaped section (105; 108) which are faced towards each other and separated by a curved section (106; 109), and wherein the first and second C-shaped sections form (104, 105; 107, 108) said two screw receiving portions (101).
  6. The screw joint arrangement according to any one of the preceding claims, wherein the bore (201) is formed as an insert (208) arranged in a through hole (209) provided in the second member (200).
  7. The screw joint arrangement according to claim 6, wherein the insert (208) comprises a first part (210) provided with the first threaded bore portion (202) and a second part (211) provided with the second threaded bore portion (203), and wherein the insert (208) is assembled by concentric insertion of one of the first and second parts (210; 211) into the other of the first and second parts (211; 210).
  8. The screw joint arrangement according to any one of claims 6-7, wherein the insert (208) is arranged in the through hole (209) by a mould-in process.
  9. The screw joint arrangement according to claim 8, wherein the insert (208) is provided with a profiled or stepped outer envelope surface.
  10. The screw joint arrangement according to any one of claims 6-9, wherein the insert (208) is made of metal.
  11. A device comprising at least one screw joint arrangement (1; 1', 1") according to any one of the preceding claims.
  12. The device according to claim 11, wherein the device is a camera device (3).
  13. The device according to claim 12, wherein the first member (100) forms part of a camera body (4) of the camera device (3) and wherein the second member (200) forms part of a lens holder unit (7) of the camera device (3).
  14. The device according to claim 13, wherein the first member (100), in said second state of the screw joint arrangement (1', 1"), is movable relative to the first member (100) between the first position and the second position by rotation about an axis corresponding to an optical axis of the lens holder unit (7).

Description

Field of the invention The present invention relates to a screw joint arrangement and a device comprising at least one such screw joint arrangement. More specifically, the invention relates to a screw joint arrangement for securing a first member and a second member to each other. Background art Screw joint arrangements are often used for securing two members to each other by means of a screw. A common problem associated with screw joint arrangements is the risk of the screw falling off during handling. It is known to provide a screw joint arrangement with some sort of retainer function in order to secure the screw to one of the members. One such solution is disclosed in DE4243097A1 A certain type of screw joint arrangement may allow the position of the two members relative to each other to be adjusted by loosening and retightening of the screw joint arrangement. A problem associated with a screw joint arrangement of this type is the risk of the screw falling off during the adjustment process, which may be cumbersome especially if the screw joint arrangement is used in an application arranged at a position which is difficult to access. An example may be a surveillance camera provided with such a screw joint arrangement and arranged in the ceiling of a room. There consequently exists a need for an improved screw joint arrangement which provides a retainer function for the screw while also allowing adjustment of the position of the two members relative each other. Summary of the invention In view of that stated above, it is an object of the present invention to provide a screw joint arrangement having a retainer function for the screw and also allowing for adjustment of the position between two members secured to each other by means of the screw joint arrangement. It is also an object to provide a device comprising at least two such screw joint arrangements. To achieve at least one of the above objects and also other objects that will be evident from the following description, a screw joint arrangement having the features defined in claim 1 and a device according to claim 11 are provided according to the present invention. Preferred embodiments will be evident from the dependent claims. More specifically, there is provided according to a first aspect of the present invention a screw joint arrangement comprising: a first member provided with at least one screw receiving portion;a second member provided with a bore comprising a first threaded bore portion, a second threaded bore portion, and a non-threaded bore portion separating the first threaded bore portion and the second threaded bore portion; anda screw comprising a screw head and a screw shaft provided with a threaded screw portion,the first member being arranged next to the second member with the first threaded bore portion of the bore of the second member being proximal to the first member, andthe screw joint arrangement being settable, by rotation of the screw, between a first state in which the second member is fixed relative to the first member, and a second state in which the second member is movable relative to the first member,wherein, in said first state, one of the at least one screw receiving portion of the first member and the bore of the second member are aligned, and the screw shaft extends through said one of the at least one screw receiving portion and into the bore with the threaded screw portion engaging the second threaded bore portion such that the first member is clamped between the screw head and the second member, andwherein, in said second state, the screw shaft extends through the first threaded bore portion of the bore and the threaded screw portion of the screw shaft is positioned in the non-threaded bore portion of the bore. Hereby an improved screw joint arrangement is provided. The screw joint arrangement is settable by rotation of the screw between the first state and the second state. The first and second member are fixed relative to each other in the first state of the screw joint arrangement. More specifically, in the first state one of the at least one screw receiving portion of the first member and the bore of the second member are aligned, and the screw shaft extends through said one of the at least one screw receiving portion and into the bore with the threaded screw portion engaging the second threaded bore portion such that the first member is clamped between the screw head and the second member. Consequently, the first member and the second member may be securely fixed to each other by setting the screw joint arrangement in said first state, i.e. by tightening of the screw. The second member is movable relative to the first member in the second state of the screw joint arrangement. More specifically, in the second state the screw shaft extends through the first threaded bore portion of the bore and the threaded screw portion of the screw shaft is positioned in the non-threaded bore portion of the bore. Hereby, the