Screw lifting and holding structure

Abstract

The utility model discloses a screw lifting keeping structure which comprises a module to be installed on a bottom plate and a locking screw, the bottom plate is provided with a screw hole which forms an included angle with the installation direction of the module, and the module is provided with a screw installation hole which is opposite to the screw hole and extends in the same direction. A screw mounting hole is formed in the bottom plate, a stud of the locking screw can penetrate through the screw mounting hole and is in threaded connection with a screw hole in the bottom plate, so that the module is fixedly positioned on the bottom plate, and a screw positioning and connecting mechanism is arranged in the screw mounting hole; according to the utility model, the module is prevented from being interfered by the locking screw when being vertically mounted and dismounted on the bottom plate, the module is ensured to be smoothly mounted and dismounted on the bottom plate, the structure is simple, the manufacture is convenient, no extra space is occupied, the cost is low, and the installation and dismounting are convenient. And the work except for rotating the locking screw is not increased.

Description

Technical Field

[0001] This utility model relates to a terminal block, and more particularly to a screw lifting and retaining structure. Background Technology

[0002] When a module needs to be locked onto the base plate, the screws are usually placed at an angle to save internal space. However, when the module is removed vertically upwards after the screws are placed at an angle, the screws, under their own weight, will protrude into the screw holes on the base plate, interfering with the screw holes and making it difficult to remove the module. Conversely, when installing the module, if the locking screws are first inserted into the screw mounting holes of the module, and then the module is installed vertically downwards onto the base plate, the screws that protrude at an angle from below the module will interfere with the module installation and will not be able to smoothly enter the threaded holes on the base plate. This affects both the installation and removal of the module on the base plate. Utility Model Content

[0003] To overcome the above deficiencies, this utility model provides a screw lifting and retaining structure that can keep the unlocked screw retracted into the screw mounting hole of the module, without interfering with the normal installation and disassembly of the module.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a screw lifting and holding structure, including a module to be installed on a base plate and a locking screw. The base plate is provided with a screw hole at an angle to the installation direction of the module. The module is provided with a screw mounting hole extending in the same direction as the screw hole. The stud of the locking screw can pass through the screw mounting hole and be screwed to the screw hole on the base plate to fix the module on the base plate. A screw positioning connection mechanism is provided in the screw mounting hole. When the locking screw is rotated to completely exit the screw hole on the base plate, the screw positioning connection mechanism in the screw mounting hole can be axially stopped by the locking screw.

[0005] As a further improvement of this utility model, the screw mounting hole is a countersunk through hole, and the head of the locking screw can be accommodated in the countersunk of the countersunk through hole and stopped on the bottom surface of the countersunk. The module is also provided with a stop member, and the head of the locking screw is blocked by the stop member so that the locking screw cannot be removed from the screw mounting hole.

[0006] As a further improvement of this utility model, the screw positioning connection mechanism is located inside the countersunk head of the countersunk through hole, and the screw positioning connection mechanism can be axially stopped by the head of the locking screw that has reached the unlocking position.

[0007] As a further improvement of this utility model, the screw positioning connection mechanism is a locking member provided on the inner side wall of the countersunk through hole. The locking member causes radial interference with the head of the locking screw, thereby preventing the head of the locking screw from moving towards the base plate without external force after reaching the unlocking position.

[0008] As a further improvement of this utility model, the locking element is a protrusion or ring protruding towards the inside of the countersunk hole, and the protrusion or ring can stop on the stepped surface where the head of the locking screw connects with the stud.

[0009] As a further improvement of this utility model, the locking element is a concave ring provided on the countersunk sidewall of the countersunk through hole, and the outer circumferential sidewall of the locking screw head is provided with a protrusion or a protruding ring, and the protrusion or protruding ring of the locking screw head can be locked in the concave ring.

[0010] As a further improvement of this utility model, the screw mounting hole is provided with an internal thread structure. When the locking screw reaches the unlocking position with the screw hole on the base plate, the locking screw can be threadedly connected and positioned with the internal thread structure in the screw mounting hole.

[0011] As a further improvement of this utility model, the internal thread structure of the screw mounting hole is located on the inner side wall of the countersunk head, and the external thread structure is provided on the outer side wall of the head circumference of the locking screw. The external thread structure and the internal thread structure can be screwed together.

[0012] As a further improvement of this utility model, the stop member is a stop ring or stop protrusion provided inside the countersunk opening of the countersunk through hole, and the gap between the inner hole of the stop ring or the stop protrusion forms an operating hole for the screwdriver to be inserted.

[0013] As a further improvement of this utility model, a spring washer is also provided on the outside of the stud of the locking screw, and the two ends of the spring washer can respectively abut against the countersunk bottom surface of the countersunk hole and the head of the locking screw.

[0014] The beneficial technical effects of this utility model are as follows: By setting a screw positioning connection mechanism in the screw mounting hole of the module, the screw positioning connection mechanism is axially stopped by the locking screw in the unlocked state. This allows the locking screw to automatically retract into the screw mounting hole of the module after being unlocked from the threaded hole on the base plate. This prevents the locking screw from protruding outside the screw mounting hole due to its own weight after being unlocked, and avoids interference from the locking screw when the module is vertically installed and disassembled on the base plate. This ensures smooth installation and disassembly of the module on the base plate. This utility model also sets a stop on the module to block the head of the locking screw, so that the locking screw will not come out of the screw mounting hole of the module after being unlocked. This ensures that the locking screw can be stably retracted in the screw mounting hole of the module and will not be lost. Furthermore, the screw positioning connection mechanism of this utility model adopts a clamp or internal thread structure, which is simple in structure, easy to manufacture, does not occupy extra space, and does not add any work other than rotating the locking screw. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing technology structure principle;

[0016] Figure 2 A perspective view of the locking screw in the unlocked state in the first structure of this utility model;

[0017] Figure 3 This is a front view of the locking screw in the unlocked state in the first structure of this utility model;

[0018] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0019] Figure 5 This is a perspective view of the locking screw and screw positioning connection mechanism in the first structure of this utility model in the disengaged state.

[0020] Figure 6 This is a front view of the locking screw and screw positioning connection mechanism in the first structure of this utility model in the disengaged state.

[0021] Figure 7 for Figure 6 Enlarged view of section B in the middle;

[0022] Figure 8 A perspective view of the locking screw in the locked state in the first structure of this utility model;

[0023] Figure 9 This is a front view of the locking screw in the locked state in the first structure of this utility model;

[0024] Figure 10 for Figure 9 Enlarged view of section C;

[0025] Figure 11 This is a three-dimensional view of the structural principle of the module in the first structure of this utility model;

[0026] Figure 12 This is a front view of the structural principle of the module in the first structure of this utility model;

[0027] Figure 13 for Figure 12 Enlarged view of section D in the middle;

[0028] Figure 14 A perspective view of the locking screw in the unlocked state in the second structure of this utility model;

[0029] Figure 15 This is a front view of the locking screw in the unlocked state in the second structure of this utility model;

[0030] Figure 16 for Figure 15 Enlarged view of section E in the middle;

[0031] Figure 17This is a perspective view of the locking screw and screw positioning connection mechanism in the second structure of this utility model in the disengaged state.

[0032] Figure 18 This is a front view of the locking screw and screw positioning connection mechanism in the second structure of this utility model in the disengaged state.

[0033] Figure 19 for Figure 18 Enlarged view of section F in the middle;

[0034] Figure 20 A perspective view of the locking screw in the locked state in the second structure of this utility model;

[0035] Figure 21 This is a front view of the locking screw in the locked state in the second structure of this utility model;

[0036] Figure 22 for Figure 21 Enlarged view of section G in the middle;

[0037] Figure 23 This is a three-dimensional view of the structural principle of the module in the second structure of this utility model;

[0038] Figure 24 This is a front view of the structural principle of the module in the second structure of this utility model;

[0039] Figure 25 for Figure 24 Enlarged view of the middle H section;

[0040] Figure 26 This is a front view of the locking screw in the second structure of this utility model. Detailed Implementation

[0041] Example: A screw lifting and retaining structure includes a module 2 to be installed on a base plate 1 and a locking screw 3. The base plate 1 has a screw hole 11 at an angle to the installation direction of the module 2. The module 2 has a screw mounting hole 21 extending in the same direction as the screw hole 11. The stud of the locking screw 3 can pass through the screw mounting hole 21 and be screwed into the screw hole 11 on the base plate 1 to fix the module 2 on the base plate 1. A screw positioning connection mechanism is provided in the screw mounting hole 21. When the locking screw 3 is rotated to completely exit the screw hole 11 on the base plate 1, the screw positioning connection mechanism in the screw mounting hole 21 can be axially stopped by the locking screw 3.

[0042] When the locking screw 3 is fully unlocked from the screw hole 11 on the base plate 1, the locking screw 3 is connected to the screw positioning connection structure, realizing the axial positioning of the locking screw 3. At this time, when the locking screw 3 is not subjected to external force, it is always retracted into the screw mounting hole 21 of the module 2 and will not extend out of the module 2 due to gravity. When installing or removing the module 2 in the vertical direction, the locking screw 3 will not come into contact with the base plate 1 and its screw hole 11 because it remains retracted into the screw mounting hole 21 of the module 2 in the unlocked state. Therefore, interference between the locking screw 3 and the base plate 1 is avoided, ensuring the smooth installation and removal of the module 2 and the base plate 1.

[0043] The screw mounting hole 21 is a countersunk through hole, allowing the head of the locking screw 3 to be accommodated within the countersunk head and stopped on the bottom surface of the countersunk head. The module 2 also includes a stop member, which prevents the head of the locking screw 3 from detaching from the screw mounting hole 21. The countersunk through hole 21 completely accommodates the locking screw 3, and the stop member prevents the screw head from coming out of the screw mounting hole 21, thus preventing the locking screw 3 from being lost after the module 2 is disassembled.

[0044] The screw positioning connection mechanism is located inside the countersunk head of the countersunk through hole, and the screw positioning connection mechanism can be axially stopped by the head of the locking screw 3 when it reaches the unlocked position.

[0045] The screw positioning and connecting mechanism is a locking element located on the inner side wall of the countersunk hole. The locking element radially interferes with the head of the locking screw 3, thus preventing the head of the locking screw 3 from moving towards the base plate 1 without external force after reaching the unlocked position. When the locking screw 3 is unlocked from the threaded hole on the base plate 1, the head of the locking screw 3 engages with the locking element inside the countersunk hole, thus locking the locking screw 3. This ensures that the locking screw 3 remains retracted inside the countersunk hole when not under external force, and does not extend outside the screw mounting hole 21, avoiding any impact on the installation and disassembly of the module 2. When it is necessary to lock the module 2 back onto the base plate 1, press the head of the locking screw 3 with a screwdriver to disengage the threaded head of the spring washer 4 from the locking element, and simultaneously rotate the locking screw 3 to screw it into the threaded hole on the base plate 1.

[0046] The locking element is a protrusion or ring 211 protruding towards the inside of the countersunk hole. The protrusion or ring 211 can stop the locking screw 3 head from moving towards the stud. When the locking screw 3 is unlocked, the screw head of the locking screw 3 just passes the protrusion or ring 211 inside the countersunk hole. The protrusion or ring 211 prevents the locking screw 3 head from moving towards the base plate 1, so that the locking screw 3 is completely retracted into the countersunk hole.

[0047] The locking element is a concave ring located on the countersunk sidewall of the countersunk hole. The locking screw 3 has a protrusion or ring 211 on its outer circumferential sidewall, which can engage with the concave ring. When the locking screw 3 is unlocked, the protrusion or ring 211 on the screw head sidewall engages with the concave ring on the countersunk sidewall. The concave ring blocks the protrusion or ring 211, preventing the locking screw 3 from moving towards the base plate 1 when no external force is applied, thus causing the locking screw 3 to retract completely within the countersunk hole.

[0048] The screw mounting hole 21 has an internal thread structure 212. When the locking screw 3 reaches the unlocked position with the screw hole 11 on the base plate 1, the locking screw 3 can be threadedly connected and positioned with the internal thread structure 212 in the screw mounting hole 21. After the locking screw 3 is unlocked, the locking screw 3 is just screwed into the internal thread structure 212 in the screw mounting hole 21. The threaded connection structure prevents the locking screw 3 from moving towards the base plate 1 without being rotated, so that the locking screw 3 is completely retracted in the countersunk through hole.

[0049] The internal thread structure 212 of the screw mounting hole 21 is located on the inner side wall of the countersunk head, and the external thread structure 31 is provided on the outer side wall of the head circumference of the locking screw 3. The external thread structure 31 and the internal thread structure 212 can be screwed together.

[0050] The stop is a stop ring 22 or a stop protrusion located inside the countersunk opening of the countersunk through hole. The gap between the inner hole of the stop ring 22 or the stop protrusion forms an operating hole for a screwdriver to insert. The inner sidewall of the stop ring 22 or the stop protrusion preferably forms a chamfered guide slope.

[0051] A spring washer 4 is fitted on the outside of the stud of the locking screw 3. The two ends of the spring washer 4 can respectively abut against the countersunk bottom surface of the countersunk hole and the head of the locking screw 3. Due to the axial elastic force of the spring washer 4, the locking screw 3 and the screw hole 11 on the base plate 1 maintain a stable locking state, which can avoid loosening due to vibration and ensure that the module 2 and the base plate 1 remain in a locked state.

Claims

1. A screw lifting and retaining structure, comprising a module (2) to be installed on a base plate (1) and a locking screw (3), wherein the base plate is provided with a screw hole (11) at an angle to the module installation direction, the module is provided with a screw mounting hole (21) extending in the same direction as the screw hole, and the stud of the locking screw can pass through the screw mounting hole and be screwed to the screw hole on the base plate to fix the module on the base plate, characterized in that: The screw mounting hole is equipped with a screw positioning connection mechanism. When the locking screw is rotated to the point where it is completely removed from the screw hole on the base plate, the screw positioning connection mechanism in the screw mounting hole can be axially stopped by the locking screw.

2. The screw lifting and retaining structure according to claim 1, characterized in that: The screw mounting hole is a countersunk through hole, and the head of the locking screw can be accommodated in the countersunk head of the countersunk through hole and stopped on the bottom surface of the countersunk head. The module is also provided with a stop member, and the head of the locking screw is blocked by the stop member so that the locking screw cannot be removed from the screw mounting hole.

3. The screw lifting and retaining structure according to claim 2, characterized in that: The screw positioning connection mechanism is located inside the countersunk head of the countersunk through hole, and the screw positioning connection mechanism can be axially stopped by the head of the locking screw that has reached the unlocked position.

4. The screw lifting and retaining structure according to claim 3, characterized in that: The screw positioning connection mechanism is a locking element located on the inner side wall of the countersunk through hole. The locking element causes radial interference with the head of the locking screw, thereby preventing the head of the locking screw from moving towards the base plate without external force after reaching the unlocking position.

5. The screw lifting and retaining structure according to claim 4, characterized in that: The locking element is a protrusion or ring (211) protruding towards the inside of the countersunk hole, and the protrusion or ring can stop on the stepped surface where the head of the locking screw connects with the stud.

6. The screw lifting and retaining structure according to claim 4, characterized in that: The locking element is a concave ring on the countersunk sidewall of the countersunk through hole. The outer circumferential sidewall of the head of the locking screw is provided with a protrusion or a protruding ring, and the protrusion or protruding ring of the head of the locking screw can be locked in the concave ring.

7. The screw lifting and retaining structure according to claim 2, characterized in that: The screw mounting hole is provided with an internal thread structure (212). When the locking screw reaches the position of being unlocked from the screw hole on the base plate, the locking screw can be threadedly connected and positioned with the internal thread structure in the screw mounting hole.

8. The screw lifting and retaining structure according to claim 7, characterized in that: The internal thread structure of the screw mounting hole is located on the inner side wall of the countersunk head, and the external thread structure (31) is provided on the outer side wall of the head circumference of the locking screw. The external thread structure and the internal thread structure can be screwed together.

9. The screw lifting and retaining structure according to claim 2, characterized in that: The stop is a stop ring (22) or a stop protrusion located inside the countersunk opening of the countersunk through hole. The gap between the inner hole of the stop ring or the stop protrusion forms an operating hole for the screwdriver to be inserted.

10. The screw lifting and retaining structure according to claim 2, characterized in that: A spring washer (4) is also fitted on the outside of the stud of the locking screw. The two ends of the spring washer can respectively abut against the countersunk bottom surface of the countersunk hole and the head of the locking screw.

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