US-20260126706-A1 - SCREW JOINT ARRANGEMENT AND A DEVICE COMPRISING AT LEAST ONE SCREW JOINT ARRANGEMENT

US20260126706A1US 20260126706 A1US20260126706 A1US 20260126706A1US-20260126706-A1

Abstract

A screw joint arrangement that allows a second member to be fixed or movable relative to a first member. The first member includes at least one screw-receiving opening. The second member includes a bore having, in order from the first member side, a first threaded section, a non-threaded section, and a second threaded section. A screw with a head and a shaft carrying a threaded portion cooperates with these features to provide two selectable states. In the fixed state, a screw-receiving opening is aligned with the bore and the screw's threaded portion engages the second threaded section, clamping the first member between the screw head and the second member. In the movable state, rotation advances the screw until its threaded portion lies within the non-threaded section while the shaft passes through the first threaded section, thereby releasing the clamp and retaining engagement between the members for adjustment.

Inventors

Karl Andersson

Assignees

AXIS AB

Dates

Publication Date: 20260507
Application Date: 20251014
Priority Date: 20241101

Claims (14)

1 . 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; and a 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, and the 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, and wherein, 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.
2 . The screw joint arrangement of claim 1 , wherein the non-threaded bore portion of the bore has a first length L 1 and the threaded screw portion of the screw shaft has a second length L 2 , the first length L 1 of the non-threaded bore portion being greater than the second length L 2 of the threaded screw portion.
3 . The screw joint arrangement of claim 1 , wherein the first member comprises two screw receiving portions and wherein the second member, in said second state of the screw joint arrangement, is movable relative to the first member between a first position in which a portion of the screw shaft is positioned in one of said two screw receiving portions and a second position in which the portion of the screw shaft is positioned in the other of said two screw receiving portions.
4 . The screw joint arrangement according to claim 3 , wherein each of the two screw receiving portions is provided with a lateral opening and wherein the second member, in said second state of the screw joint arrangement, is movable relative to the first member 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 comprises a peripheral portion comprising a first C-shaped section and a second C-shaped section which are faced towards each other and separated by a curved section, and wherein the first and second C-shaped sections form said two screw receiving portions.
6 . The screw joint arrangement according to claim 1 , wherein the bore is formed as an insert arranged in a through hole provided in the second member.
7 . The screw joint arrangement according to claim 6 , wherein the insert comprises a first part provided with the first threaded bore portion and a second part provided with the second threaded bore portion, and wherein the insert is assembled by concentric insertion of one of the first and second parts into the other of the first and second parts.
8 . The screw joint arrangement according to claim 6 , wherein the insert is arranged in the through hole by a mould-in process.
9 . The screw joint arrangement according to claim 8 , wherein the insert is provided with a profiled or stepped outer envelope surface.
10 . The screw joint arrangement according to claim 6 , wherein the insert is made of metal.
11 . A device comprising at least one 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; and a 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, and the 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, and wherein, 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.
12 . The device according to claim 11 , wherein the device is a camera device.
13 . The device according to claim 12 , wherein the first member forms part of a camera body of the camera device and wherein the second member forms part of a lens holder unit of the camera device.
14 . The device according to claim 13 , wherein the first member, in said second state of the screw joint arrangement, is movable relative to the first member between the first position and the second position by rotation about an axis corresponding to an optical axis of the lens holder unit.

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 re-tightening 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, t