Screw bouncing structure for locking terminal block module

Abstract

The utility model discloses a screw bouncing structure for locking a terminal block module, 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, the module is provided with a screw installation hole which extends in the same direction as the screw hole, and the locking screw is arranged in the screw installation hole. A stop ring with the inner diameter smaller than the outer diameter of the head of the locking screw is formed at the end, back on to the bottom plate, of the screw mounting hole, and an elastic piece is further arranged in the screw mounting hole and provides elastic reset force towards the direction away from the bottom plate for the locking screw. According to the utility model, the locking screw can be stably contracted in the screw mounting hole of the module and cannot extend out due to the influence of self weight, so that the module is prevented from being interfered by the locking screw when being vertically mounted and dismounted on the bottom plate, and the module is ensured to be smoothly mounted and dismounted on the bottom plate.

Description

Technical Field

[0001] This utility model relates to a terminal block, and more particularly to a screw spring structure for locking a terminal block module. 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 spring-loaded structure for locking terminal block modules. This screw spring-loaded structure 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 spring-up structure for locking terminal block modules, 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 module installation direction. The module is provided with a screw mounting hole extending in the same direction as the screw hole. A stop ring with an inner diameter smaller than the outer diameter of the locking screw head is formed at the end of the screw mounting hole facing away from the base plate. An elastic element is also provided in the screw mounting hole. The elastic element provides the locking screw with an elastic restoring force in the direction away from the base plate.

[0005] As a further improvement of this utility model, the elastic element is a spring, which is sleeved on the outside of the locking screw. One end of the spring is pressed against the stepped surface formed between the head of the locking screw and the stud of the locking screw, and the other end of the spring is fixedly clamped on the inner wall of the screw mounting hole.

[0006] As a further improvement of this utility model, a spring positioning groove is formed on the inner wall of the screw mounting hole, and at least one positioning ring with an increased diameter is formed on the other end of the spring. The positioning ring at the other end of the spring is engaged in the spring positioning groove on the inner wall of the screw mounting hole.

[0007] As a further improvement of this utility model, the screw mounting hole is a countersunk hole, and the head of the locking screw is stopped on the countersunk bottom surface of the countersunk hole.

[0008] As a further improvement of this utility model, a screw assembly mounting groove with a lateral opening is formed on the side wall of the module. The two opposite side walls of the screw assembly mounting groove are respectively provided with a screw adjustment port and a stud protrusion port communicating with the outside. A screw receiving shell is also provided, and a screw receiving cavity is formed inside the screw receiving shell. The locking screw and the elastic element are both received in the screw receiving cavity to form a screw assembly. The locking screw can slide along its axial direction within the screw receiving cavity. An opening is formed on one side wall along the axial direction of the locking screw, directly opposite the head of the locking screw. A notch is formed on the other side wall along the axial direction of the locking screw, allowing the stud of the locking screw to protrude. The screw receiving shell can be fixedly inserted into the screw assembly mounting groove. The opening on one side wall along the axial direction of the locking screw communicates directly opposite the screw adjustment port, and the notch on the other side wall along the axial direction of the locking screw communicates directly opposite the stud protrusion port.

[0009] As a further improvement of this utility model, the inner diameter of the opening on one side wall along the axial direction of the locking screw in the screw receiving shell is smaller than the outer diameter of the head of the locking screw. A screw inlet is formed on one side wall along the radial direction of the locking screw in the screw receiving shell for the locking screw and spring to be inserted into the screw receiving cavity in the radial direction. A protruding structure is formed on the bottom surface of the screw assembly mounting groove on the side wall of the module. The protruding structure can be inserted into the screw inlet of the screw receiving shell, and the surface of the protruding structure and the inner side wall of the screw receiving cavity are joined together to form a screw mounting hole.

[0010] As a further improvement of this utility model, the inner wall of the screw assembly mounting groove of the module and the outer wall of the screw receiving shell are fastened together by a snap-fit ​​structure.

[0011] As a further improvement of this utility model, a hollowed-out snap-fit ​​opening is provided on one side wall of the screw assembly mounting slot, and an inverted protrusion is provided on one side wall of the screw receiving shell along the axial direction of the locking screw. The inverted protrusion can be snapped into the snap-fit ​​opening on one side wall of the screw assembly mounting slot. An inverted boss is provided on the other side wall of the screw assembly mounting slot, and an inverted step is provided on the other side wall of the screw receiving shell along the axial direction of the locking screw. The inverted step on the other side wall of the screw receiving shell directly stops the inverted boss on the other side wall of the screw assembly mounting slot.

[0012] As a further improvement of this utility model, a V-shaped opening slot structure is formed between the side wall of the protruding structure on the bottom surface of the screw assembly mounting slot and the side wall of the screw assembly mounting slot. One side wall of the screw receiving shell can be inserted into the V-shaped opening slot structure, and the side wall of the screw receiving shell is flush with the side wall of the protruding structure on the bottom surface of the screw assembly mounting slot. At least one protruding rib is also provided at intervals on the side wall of the screw receiving shell, and the protruding rib is in close contact with the side wall of the screw assembly mounting slot.

[0013] As a further improvement of this utility model, the screw receiving shell is provided with guide grooves extending along the direction of insertion into the screw assembly mounting groove on two opposite side walls, and the screw assembly mounting groove is provided with inwardly protruding guide rails on two opposite side walls, the guide rails being able to be inserted into the guide grooves.

[0014] The beneficial technical effects of this utility model are as follows: By setting an elastic element in the screw mounting hole of the module, the elastic element provides elastic force to the locking screw, so that after the locking screw is unlocked from the threaded hole on the base plate, it automatically retracts into the screw mounting hole of the module. Furthermore, since a stop ring is formed at the end of the screw mounting hole facing away from the base plate to block the head of the locking screw, the locking screw will not come out of the screw mounting hole of the module. In this way, the locking screw can be stably retracted in the screw mounting hole of the module and will not extend due to its own weight. Therefore, it avoids interference from the locking screw when the module is vertically installed and disassembled on the base plate, ensuring smooth installation and disassembly of the module on the base plate. 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 inside the module of this utility model in the unlocked state;

[0017] Figure 3 The front view of the module locking screw of this utility model in the unlocked state;

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

[0019] Figure 5 A perspective view of the locking screw inside the module of this utility model in the locked state;

[0020] Figure 6 The front view of the module locking screw of this utility model in the locked state;

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

[0022] Figure 8 This is a perspective view of the screw assembly of this utility model;

[0023] Figure 9 This is a front view of the screw assembly of this utility model;

[0024] Figure 10 for Figure 9 C-axis sectional view;

[0025] Figure 11 This is a three-dimensional cross-sectional view of the screw receiving shell of this utility model;

[0026] Figure 12 This is a front view of the screw receiving shell of this utility model;

[0027] Figure 13 for Figure 12 Sectional view along the DD direction;

[0028] Figure 14 This is a perspective view of the spring of this utility model. Detailed Implementation

[0029] Example: A screw spring-loaded structure for locking a terminal block module 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. A stop ring 22 with an inner diameter smaller than the outer diameter of the head of the locking screw 3 is formed at the end of the screw mounting hole 21 facing away from the base plate 1. An elastic element is also provided in the screw mounting hole 21. The elastic element provides the locking screw 3 with an elastic restoring force in the direction away from the base plate 1. Under the action of the elastic element, the locking screw 3 is always retracted in the screw mounting hole 21 of the module 2 when not subjected to external force. It will not extend to the outside of the module 2 due to gravity. When installing or removing the module 2 in the vertical direction, the locking screw 3 remains retracted in the screw mounting hole 21 of the module 2 in the unlocked state. The locking screw 3 will not come into contact with the base plate 1 and its screw hole 11. 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. After the locking screw 3 is threaded into the screw hole 11 on the base plate 1, due to the axial force of the elastic element, the locking screw 3 and the screw hole 11 on the base plate 1 maintain a stable locking state, which can prevent loosening due to vibration and ensure that the module 2 and the base plate 1 remain in the locked state.

[0030] The elastic element is a spring 4, which is sleeved on the outside of the locking screw 3. One end of the spring 4 abuts against the stepped surface formed between the head of the locking screw 3 and the stud of the locking screw 3, and the other end of the spring 4 is fixedly engaged with the inner wall of the screw mounting hole 21. In addition to using a spring 4, other elastic elements such as a spring sheet can also be used.

[0031] A spring positioning groove 211 is formed on the inner wall of the screw mounting hole 21. At least one positioning ring 41 with an increased diameter is formed at the other end of the spring 4. The positioning ring 41 at the other end of the spring 4 is engaged in the spring positioning groove on the inner wall of the screw mounting hole 21. The lowest coil of the spring 4 has an increased diameter to form the positioning ring 41, which is engaged in the spring 4 positioning groove of the screw mounting hole 21 during installation, thereby positioning the spring 4 with the screw mounting hole 21. This positioning method can ensure that the spring 4 does not deform radially under pressure, prevent it from interfering with the locking screw 3, and facilitate the installation and positioning of the spring 4.

[0032] The screw mounting hole 21 is a countersunk hole, and the head of the locking screw 3 is stopped on the countersunk bottom surface 212 of the countersunk hole. The countersunk bottom surface 212 is used to limit the screw and prevent the screw from being over-tightened, which would damage the spring 4.

[0033] A screw assembly mounting groove 23 with a lateral opening is formed on the side wall of the module 2. The two opposite side walls of the screw assembly mounting groove 23 are respectively provided with a screw adjustment port 231 communicating with the outside and a stud extension port 232. A screw receiving shell 5 is also provided, and a screw receiving cavity 51 is formed inside the screw receiving shell 5. The locking screw 3 and the elastic element are both received in the screw receiving cavity 51 to form a screw assembly. The locking screw 3 can slide along its axial direction within the screw receiving cavity 51. The screw receiving shell 5 is located along the axis of the locking screw 3. An opening 52 is formed on one side wall of the screw housing 5, directly opposite the head of the locking screw 3. A notch 53 for the stud of the locking screw 3 to extend is formed on the other side wall of the screw housing 5 along the axis of the locking screw 3. The screw housing 5 can be fixedly inserted into the screw assembly mounting slot 23. The opening 52 on one side wall of the screw housing 5 along the axis of the locking screw 3 is directly opposite and communicates with the screw adjustment port 231, and the notch 53 on the other side wall of the screw housing 5 along the axis of the locking screw 3 is directly opposite and communicates with the stud extension port 232. During assembly, the screw and spring 4 are first installed in the screw housing 5 to form a screw assembly. Then, the screw assembly is fixedly inserted into the screw assembly mounting slot 23 of the module 2. This structure facilitates the assembly of the screw and spring 4 in the screw positioning hole and allows for the replacement of different specifications of locking screws 3 according to the size of the screw holes 11 on different base plates 1.

[0034] The inner diameter of the opening 52 on one side wall of the screw receiving shell 5 along the axial direction of the locking screw 3 is smaller than the outer diameter of the head of the locking screw 3. A screw inlet 54 is formed on one side wall of the screw receiving shell 5 along the radial direction of the locking screw 3, allowing the locking screw 3 and the spring 4 to be inserted into the screw receiving cavity 51 radially. A protruding structure 233 is formed on the bottom surface of the screw assembly mounting groove 23 on the side wall of the module 2. The protruding structure 233 can be inserted into the screw inlet 54 of the screw receiving shell 5, and the surface of the protruding structure 233 and the inner side wall of the screw receiving cavity 51 are joined together to form a screw mounting hole 21. A screw inlet 54 is formed on the radial sidewall of the screw receiving shell 5. During assembly, the spring 4 can be first put on the stud of the locking screw 3, and then inserted into the screw receiving cavity 51 together. The positioning ring 41 of the spring 4 is also directly inserted into the spring 4 positioning groove of the opening structure formed on the sidewall of the screw receiving cavity 51, which is convenient for assembly. Then, after this whole assembly is inserted into the screw assembly mounting groove 23 of the module 2, the protruding structure 233 on the bottom surface of the screw assembly mounting groove 23 will close the screw inlet on the screw receiving shell 5, ensuring that the locking screw 3 and the spring 4 will not come out.

[0035] The inner wall of the screw assembly mounting slot 23 of module 2 is connected to the outer wall of the screw receiving shell 5 by a snap-fit ​​structure. The snap-fit ​​structure facilitates the installation and positioning of the screw assembly. In addition, interference fit or screw locking can also be used for fixed positioning.

[0036] A hollowed-out slot 234 is provided on one side wall of the screw assembly mounting slot 23. An inverted protrusion 55 is provided on one side wall of the screw receiving shell 5 along the axial direction of the locking screw 3. The inverted protrusion 55 can be engaged in the slot on one side wall of the screw assembly mounting slot 23. An inverted boss 235 is provided on the other side wall of the screw assembly mounting slot 23. An inverted step 56 is provided on the other side wall of the screw receiving shell 5 along the axial direction of the locking screw 3. The inverted step 56 on the other side wall of the screw receiving shell 5 directly stops against the inverted boss on the other side wall of the screw assembly mounting slot. When the screw assembly is installed into the screw assembly mounting slot 23 of the module 2, the inverted protrusion 55 on the screw receiving shell 5 engages in the slot on one side wall of the screw assembly mounting slot 23. Simultaneously, the inverted step 56 on the screw receiving shell 5 passes over the inverted boss on the other side wall of the screw assembly mounting slot 23 and forms a blocking structure, achieving automatic engagement.

[0037] The screw assembly mounting groove 23 has a V-shaped opening slot structure 236 formed by the protruding structure 233 on one side wall of the bottom surface of the screw assembly mounting groove 23 and the protruding structure 233 on the bottom surface of the screw assembly mounting groove 23. One side wall of the screw receiving shell 5 can be inserted into the V-shaped opening slot structure 236, and the one side wall of the screw receiving shell 5 is flush with the protruding structure 233 on the bottom surface of the screw assembly mounting groove 23. At least one protruding rib 57 is also provided at intervals on the one side wall of the screw receiving shell 5, and the protruding rib 57 is in close contact with the one side wall of the screw assembly mounting groove 23. This structure ensures that while the screw receiving shell 5 is tightly inserted into the screw assembly mounting groove 23, the snap-fit ​​structures at both ends of the screw receiving shell 5 and the screw assembly mounting groove 23 remain in a tight snap-fit ​​connection state, and will not be disengaged under tension.

[0038] The screw receiving shell 5 is further provided with guide grooves 58 extending along the direction of insertion into the screw assembly mounting slot 23 on two opposite side walls. The screw assembly mounting slot 23 is provided with inwardly protruding guide rails on two opposite side walls, and the guide rails can be inserted into the guide grooves 58. Through the cooperation of the guide grooves 58 and the guide rails, the screw receiving shell 5 can be smoothly inserted into the screw assembly mounting slot 23.

Claims

1. A screw spring-loaded structure for locking a terminal block module, 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, and the module is provided with a screw mounting hole (21) extending in the same direction as the screw hole, characterized in that: The screw mounting hole has a stop ring (22) with an inner diameter smaller than the outer diameter of the screw head at the end facing away from the base plate. An elastic element is also provided in the screw mounting hole, which provides the screw with an elastic restoring force in the direction away from the base plate.

2. The screw spring-loaded structure for locking the terminal block module according to claim 1, characterized in that: The elastic element is a spring (4), which is sleeved on the outside of the locking screw. One end of the spring is pressed against the stepped surface formed between the head of the locking screw and the stud of the locking screw, and the other end of the spring is fixedly clamped on the inner wall of the screw mounting hole.

3. The screw spring-loaded structure for locking the terminal block module according to claim 2, characterized in that: A spring positioning groove (211) is formed on the inner wall of the screw mounting hole, and at least one positioning ring (41) with an increased diameter is formed on the other end of the spring. The positioning ring at the other end of the spring is engaged in the spring positioning groove on the inner wall of the screw mounting hole.

4. The screw spring-loaded structure for locking terminal block modules according to claim 1 or 3, characterized in that: The screw mounting hole is a countersunk hole, and the head of the locking screw is stopped on the countersunk bottom surface (212) of the countersunk hole.

5. The screw spring-loaded structure for locking terminal block modules according to claim 1, 2 or 3, characterized in that: A screw assembly mounting groove (23) with a lateral opening is formed on the side wall of the module. The two opposite side walls of the screw assembly mounting groove are respectively provided with a screw adjustment port (231) and a stud protrusion port (232) communicating with the outside. A screw receiving shell (5) is also provided. A screw receiving cavity (51) is formed inside the screw receiving shell. The locking screw and the elastic element are both accommodated in the screw receiving cavity to form a screw assembly. The locking screw can slide along its axial direction in the screw receiving cavity. An opening (52) is formed on one side wall along the axial direction of the locking screw, which is directly opposite to the head of the locking screw. A notch (53) is formed on the other side wall along the axial direction of the locking screw for the stud of the locking screw to protrude. The screw receiving shell can be fixedly inserted into the screw assembly mounting groove. The opening on one side wall along the axial direction of the locking screw is directly opposite to the screw adjustment port and the notch on the other side wall along the axial direction of the locking screw is directly opposite to the stud protrusion port.

6. The screw spring-loaded structure for locking the terminal block module according to claim 5, characterized in that: The inner diameter of the opening on one side wall of the screw receiving shell along the axial direction of the locking screw is smaller than the outer diameter of the head of the locking screw. A screw inlet (54) is formed on one side wall of the screw receiving shell along the radial direction of the locking screw for the locking screw and spring to be inserted into the screw receiving cavity in the radial direction. A protruding structure (233) is formed on the bottom surface of the screw assembly mounting groove on the side wall of the module. The protruding structure can be inserted into the screw inlet of the screw receiving shell, and the surface of the protruding structure and the inner side wall of the screw receiving cavity are joined together to form a screw mounting hole.

7. The screw spring-loaded structure for locking the terminal block module according to claim 6, characterized in that: The inner wall of the screw assembly mounting slot of the module is fastened to the outer wall of the screw receiving shell by a snap-fit ​​structure.

8. The screw spring-loaded structure for locking terminal block modules according to claim 7, characterized in that: A hollowed-out slot (234) is provided on one side wall of the screw assembly mounting slot. An inverted protrusion (55) is provided on one side wall of the screw receiving shell along the axial direction of the locking screw. The inverted protrusion can be locked in the slot on one side wall of the screw assembly mounting slot. An inverted boss (235) is provided on the other side wall of the screw assembly mounting slot. An inverted step (56) is provided on the other side wall of the screw receiving shell along the axial direction of the locking screw. The inverted step on the other side wall of the screw receiving shell directly stops the inverted boss on the other side wall of the screw assembly mounting slot.

9. The screw spring-loaded structure for locking terminal block modules according to claim 8, characterized in that: A V-shaped opening slot structure (236) is formed between the side wall of the protruding structure on the bottom surface of the screw assembly mounting slot and the side wall of the screw assembly mounting slot. One side wall of the screw receiving shell can be inserted into the V-shaped opening slot structure, and the side wall of the screw receiving shell is flush with the side wall of the protruding structure on the bottom surface of the screw assembly mounting slot. At least one protruding rib (57) is also provided at intervals on one side wall of the screw receiving shell, and the protruding rib is in close contact with the side wall of the screw assembly mounting slot.

10. The screw spring-loaded structure for locking terminal block modules according to claim 5, characterized in that: The screw receiving shell is provided with guide grooves (58) extending along the direction of insertion into the screw assembly mounting groove on its two opposite side walls. The screw assembly mounting groove is provided with inwardly protruding guide rails on its two opposite side walls. The guide rails can be inserted into the guide grooves.

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