Hand screw for preventing static electricity of circuit board

Abstract

The utility model provides an anti-static hand screw for a circuit board, which comprises a rubber cap, the rubber cap is fixedly mounted on a bolt head of a screw connecting piece after injection molding, and a screw body penetrates through the inside of the rubber cap; the external thread of the screw connecting piece extends out of the rubber cap; the guide sleeve is installed on the screw connecting piece in a sleeving mode from the end, away from the rubber cap, of the screw connecting piece and can move up and down in the rubber cap along with a screw body of the screw connecting piece. The part, located in the rubber cap, of the screw connecting piece is further sleeved with a spring, and the two ends of the spring abut against the inner wall of the rubber cap and the top of the guide sleeve respectively. On the basis of the screw connecting piece, the insulated rubber cap is formed at one end in an injection molding mode, static electricity is prevented from being generated when a screw is turned, in addition, the screw connecting piece is further sleeved with the silicon rubber sleeve, the position of the guide sleeve can be limited, the guide sleeve and a corresponding circuit board can be conveniently positioned and welded before the screw is turned, shaking is avoided, and the service life of the screw is prolonged. And the cost is reduced while the mounting precision is high.

Description

Technical Field

[0001] The utility model relates to the field of hand screws, in particular to the technical field of screws for circuit boards, and specifically is a hand screw for anti-static use of circuit boards. Background Art

[0002] When circuit boards are produced in small batches or are customized, manual disassembly is usually used. Simple screw installation can achieve a stable effect, and it can be flexibly adjusted according to the specific situation to ensure that each component is accurately installed in the correct position, and the cost can be effectively reduced. In addition, when the circuit board needs to be taken out of the host for inspection, manual disassembly and installation are also usually used.

[0003] Due to the characteristics of circuit boards, improper operation during maintenance will usually cause static electricity inadvertently. When static electricity energy breakdown occurs, it will directly damage the materials and devices of the circuit board, interfere with the signals on the circuit board, reduce signal quality, and even cause the signal to be unable to be transmitted, thereby affecting the normal operation of the circuit board. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a hand-tightened screw for anti-static circuit board to solve the difficulties of the prior art.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a hand screw for anti-static of circuit board, comprising:

[0006] A rubber cap 1, which is fixedly mounted on a bolt head 21 of a screw connector 2 after injection molding, and passes through a screw body 22;

[0007] A screw connector 2, wherein the external thread 23 of the screw connector 2 extends out of the rubber cap 1;

[0008] A guide sleeve 3, wherein the guide sleeve 3 is sleeved and installed on the screw connector 2 from one end of the screw connector 2 away from the rubber cap 1, and can move up and down in the rubber cap 1 along with the screw body 22 of the screw connector 2;

[0009] Spring 4: The portion of the screw connector 2 located inside the rubber cap 1 is also sleeved with a spring 4, and the two ends of the spring 4 are respectively against the inner wall of the rubber cap 1 and the top of the guide sleeve 3.

[0010] According to the preferred embodiment, the rubber cap 1, the screw connector 2, the guide sleeve 3 and the spring 4 are all coaxially arranged.

[0011] According to a preferred embodiment, the rubber cap 1 is made of nylon-modified insulating material.

[0012] According to the preferred embodiment, the screw connector 2 is integrally provided with a bolt head 21, a screw body 22 and an external thread 23 along the axial direction, the bolt head 21 and the rubber cap 1 are integrally injection molded, and the screw body 22 is located on the side wall between the bolt head 21 and the external thread 23 and adopts an aperture structure;

[0013] The outer diameter of the external thread 23 is greater than the outer diameter of the aperture.

[0014] According to a preferred embodiment, a driving groove 24 is further provided on one end of the bolt head 21 away from the external thread 23 , and the driving groove 24 has a plum blossom groove structure.

[0015] According to the preferred embodiment, the rubber cap 1 is integrally provided with a rotating end 11 and a connecting end 12 along the axial direction;

[0016] The outer diameter of the rotating end 11 is greater than the outer diameter of the connecting end 12;

[0017] The connection end 12 is provided with a groove 14 passing through the screw connection piece 2 .

[0018] According to a preferred embodiment, the connecting end 12 forms a tapered structure, and the outer diameter gradually decreases in the downward direction.

[0019] According to a preferred embodiment, the outer circumference of the rotating end 11 is provided with annular anti-slip knurling 13 arranged at equal intervals.

[0020] According to a preferred embodiment, the guide sleeve 3 comprises:

[0021] A guide sleeve body 31, wherein the guide sleeve body 31 is sleeved on the outer side of the screw body 22, and a through hole 32 is formed inside the guide sleeve body 31 and passes through the guide sleeve body 31 vertically;

[0022] The upper limit platform 33 is integrally and horizontally arranged on the inner side of the top of the guide sleeve body 31, and a center hole 34 is opened at the center to pass through the screw body 22. The inner diameter of the center hole 34 is smaller than the inner diameter of the spring 4, and the outer diameter of the upper limit platform 33 is larger than the outer diameter of the spring 4.

[0023] The lower limiting platform 35 is integrally and horizontally arranged on the outer side of the bottom of the guide sleeve body 31 , and the outer diameter of the lower limiting platform 35 is not less than the inner diameter of the groove 14 .

[0024] According to a preferred solution, the inner diameter of the central hole 34 is smaller than the outer diameter of the external thread 23 .

[0025] According to a preferred embodiment, a detachable silicone sleeve 5 is provided on the bottom of the screw connector 2. When the screw connector 2 is screwed to the bottom, the silicone sleeve 5 is sleeved on the external thread 23 of the screw connector 2 to clamp the guide sleeve 3 and the spring 4.

[0026] According to a preferred embodiment, a silicone limiting side wall 36 is further provided on the inner wall of the through hole 32 , and the inner diameter of the silicone limiting side wall 36 is smaller than the outer diameter of the silicone sleeve 5 .

[0027] According to a preferred embodiment, the length of the silicone sleeve 5 is slightly greater than the length of the external thread 23 .

[0028] According to a preferred embodiment, the thickness of the silicone sleeve 5 is slightly smaller than the distance between the external thread 23 and the inner wall of the groove 14 .

[0029] The utility model has an insulating rubber cap injection-molded on one end of the screw connector to prevent static electricity from being generated when the screw is tightened. In addition, a silicone sleeve is also provided on the screw connector, which can not only limit the position of the guide sleeve but also facilitate the positioning welding of the guide sleeve and the corresponding circuit board before tightening the screw, thereby preventing shaking, achieving high installation accuracy and reducing costs.

[0030] The best embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The display is a three-dimensional structural schematic diagram of the utility model;

[0032] Figure 2 The display is a front view of the utility model;

[0033] Figure 3 Shown is a cross-sectional view of the present utility model;

[0034] Figure 4 The display is an enlarged schematic diagram of the structure of the guide sleeve in the utility model;

[0035] Figure 5 Shown is a schematic diagram of the structure of the second embodiment of the utility model;

[0036] Figure 6 Shown is a cross-sectional view of the second embodiment of the present utility model;

[0037] Description of symbols

[0038] 1. Rubber cap, 11. Rotating end, 12. Connecting end, 13. Anti-slip knurling, 14. Groove;

[0039] 2. screw connecting piece, 21. bolt head, 22. screw body, 23. external thread, 24. driving groove;

[0040] 3. guide sleeve, 31. guide sleeve body, 32. through hole, 33. upper limit platform, 34. center hole, 35. lower limit platform, 36. silicone limit side wall;

[0041] 4. Spring;

[0042] 5. Silicone cover. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] Compared with the embodiments shown in the drawings, feasible implementations within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0045] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] The utility model provides a hand screw for preventing static electricity of a circuit board, which is used in the circuit board installation process. The utility model does not limit the type of the circuit board, but the structure of the hand screw for preventing static electricity of the circuit board is particularly suitable for use in a host computer case.

[0047] In general, the hand screw for anti-static circuit board proposed in the utility model mainly includes a rubber cap 1, a screw connector 2, a guide sleeve 3, and a spring 4. Figure 1, which shows the arrangement relationship of the rubber cap 1, the screw connector 2, the guide sleeve 3, and the spring 4.

[0048] In order to achieve the purpose of avoiding static electricity when manually installing circuit boards and to solve the problem in the background technology that due to the characteristics of circuit boards, static electricity will usually occur inadvertently if the operation is improper during the maintenance process. When static electricity energy breakdown occurs, it will directly damage the materials and devices of the circuit board, interfere with the signals on the circuit board, reduce the signal quality, and even cause the signal to be unable to be transmitted, thereby affecting the normal operation of the circuit board. For this reason, in the technical solution provided in this embodiment, an insulating rubber cap is injection-molded at one end on the basis of the screw connector 2 to avoid static electricity when tightening the screws. In addition, a silicone sleeve 5 is also provided on the screw connector 2, which can not only limit the position of the guide sleeve 3 but also facilitate the positioning welding of the guide sleeve 3 and the corresponding circuit board before tightening the screws, thereby avoiding shaking, and reducing the cost while achieving high installation accuracy.

[0049] Embodiment 1

[0050] like Figure 1 As shown, the structure provided by the utility model includes a coaxially arranged rubber cap 1, a screw connector 2 and a guide sleeve 3. The rubber cap 1 is fixedly installed on the bolt head 21 of the screw connector 2 after injection molding, and the screw body 22 is passed through the inside. The external thread 23 of the screw connector 2 extends out of the rubber cap 1. The guide sleeve 3 is sleeved and installed on the screw connector 2 from one end of the screw connector 2 away from the rubber cap 1, and can move up and down in the rubber cap 1 along with the screw body 22 of the screw connector 2.

[0051] In order to prevent static electricity from being generated when the screw connector 2 is working by using the rubber cap 1, the rubber cap 1 provided in this embodiment is made of nylon-modified insulating material as a whole. In addition, in terms of structure, the rubber cap 1 is integrally provided with a rotating end 11 and a connecting end 12 along the axial direction, and the outer circumference of the rotating end 11 is provided with annular and evenly spaced anti-slip knurling 13. The outer diameter of the rotating end 11 is larger than the outer diameter of the connecting end 12. The connecting end 12 forms a conical structure, and the outer diameter gradually decreases in the downward direction, which provides a convenient viewing angle for the operator, allowing the operator to easily observe the screwing-in of the bolt and facilitating alignment with the circuit board.

[0052] like Figure 2As shown, a groove 14 is provided in the connection end 12 of the rubber cap 1 for passing the screw connector 2. As mentioned above, the screw connector 2 is installed in the rubber cap 1. Specifically, the screw connector 2 is integrally provided with a bolt head 21, a screw body 22 and an external thread 23 along the axial direction. The bolt head 21 and the rubber cap 1 are integrally injection-molded. At the same time, the bolt head 21 is flush with the end of the rubber cap 1 away from the external thread 23. Considering that the rubber cap 1 can be used to rotate manually in the early stage of bolt rotation, and the effect of further strengthening with a screwdriver in the later stage will be better, a driving groove 24 is further provided on the end of the bolt head 21 away from the external thread 23. Preferably, the driving groove 24 adopts a plum blossom groove structure;

[0053] Next, an aperture structure is adopted on the side wall of the screw body 22 between the bolt head 21 and the external thread 23, with the purpose of partially sleeved with a spring 4, with the two ends of the spring 4 respectively resting on the inner wall of the rubber cap 1 and the top of the guide sleeve 3, so that the spring 4 plays a role in buffering and supporting the guide sleeve 3.

[0054] It should be specifically explained that a guide sleeve body 31 is arranged in the middle of the guide sleeve 3, the guide sleeve body 31 is sleeved on the outside of the screw body 22, and a through hole 32 is formed inside thereof to penetrate from top to bottom, an upper limit platform 33 is integrally arranged horizontally on the top inner side of the guide sleeve body 31, and a center hole 34 is opened at the center to penetrate the screw body 22, and the through hole 32 and the center hole 34 penetrate the screw body 22;

[0055] On this basis, in order to prevent the guide sleeve 3 from falling off the screw connector 2 during movement, it is preferred to set the inner diameter of the center hole 34 to be smaller than the outer diameter of the external thread 23, and utilize the external thread 23 to achieve the purpose of limiting the moving space of the guide sleeve 3. Correspondingly, in the opposite direction, to prevent the guide sleeve 3 from excessively extending into the rubber cap 1, the lower limit platform 35 is integrally and horizontally arranged on the bottom outer side of the guide sleeve body 31, and the outer diameter of the lower limit platform 35 is not less than the inner diameter of the groove 14, thereby achieving the purpose of limiting the movement of the guide sleeve 3 between the lower limit platform 35 and the top of the external thread 23; similarly, in order to meet the structural installation requirements of the spring 4, the inner diameter of the center hole 34 is smaller than the inner diameter of the spring 4, and the outer diameter of the upper limit platform 33 is larger than the outer diameter of the spring 4.

[0056] Embodiment 2

[0057] As mentioned above, this embodiment also mentions that the hand screw needs to be welded and positioned with another locking product before tightening the screw, that is, the guide sleeve 3 needs to be welded to the corresponding position on the circuit board. During welding, the relative position between the guide sleeve 3 and the screw connector 2 needs to be fixed. Therefore, a detachable silicone sleeve 5 is provided on the bottom of the screw connector 2. When the screw connector 2 is screwed to the bottom, the silicone sleeve 5 is sleeved on the external thread 23 of the screw connector 2 to achieve the purpose of clamping the guide sleeve 3 and the spring 4.

[0058] On this basis, preferably, a silicone limiting side wall 36 is also provided on the inner wall of the through hole 32. The inner diameter of the silicone limiting side wall 36 is smaller than the outer diameter of the silicone sleeve 5. The silicone limiting side wall 36 is utilized to limit the silicone sleeve 5 during installation. In addition, the thickness of the silicone sleeve 5 is slightly smaller than the distance between the external thread 23 and the inner wall of the groove 14. When in use, only when it reaches this position, the guide sleeve 3 can be pushed toward the groove 14 and then clamped on the external thread 23 to form a clamping effect, so that there will be no looseness between the structures, thereby achieving the effect of precise alignment.

[0059] Preferably, the length of the silicone sleeve 5 is slightly greater than the length of the external thread 23. Since the silicone sleeve 5 will be expanded when it is stuck in the external thread 23, the elastic silicone sleeve 5 can be prevented from shortening after being expanded. The slightly longer structure can protect the external thread 23 at the bottom of the screw connector 2.

[0060] After welding is completed, it is only necessary to manually remove the silicone sleeve 5, and the screw connector 2 can be flexibly moved and rotated in the guide sleeve 3 to achieve the effect of screw connection.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A hand screw for anti-static circuit board, characterized in that: include: A rubber cap (1), wherein the rubber cap (1) is fixedly mounted on a bolt head (21) of a screw connecting piece (2) after injection molding, and the inside of the rubber cap (1) passes through a screw body (22); A screw connector (2), wherein the external thread (23) of the screw connector (2) extends out of the rubber cap (1); A guide sleeve (3), the guide sleeve (3) being sleeved and installed on the screw connector (2) from one end of the screw connector (2) away from the rubber cap (1), and being able to move up and down in the rubber cap (1) along with the screw body (22) of the screw connector (2); A spring (4), wherein the portion of the screw rod connector (2) located inside the rubber cap (1) is also sleeved with a spring (4), and the two ends of the spring (4) are respectively abutted against the inner wall of the rubber cap (1) and the top of the guide sleeve (3).

2. The anti-static hand screw for circuit boards according to claim 1, characterized in that: The screw connecting piece (2) is integrally provided with a bolt head (21), a screw body (22) and an external thread (23) along the axial direction; the bolt head (21) and the rubber cap (1) are integrally injection-molded; and the screw body (22) is located on a side wall between the bolt head (21) and the external thread (23) and has an aperture structure; The outer diameter of the external thread (23) is greater than the outer diameter of the aperture.

3. The anti-static hand screw for circuit boards according to claim 2, characterized in that: The rubber cap (1) is integrally provided with a rotating end (11) and a connecting end (12) along the axial direction; The outer diameter of the rotating end (11) is greater than the outer diameter of the connecting end (12); The connection end (12) is provided with a groove (14) passing through the screw connection piece (2).

4. The anti-static hand screw for circuit boards according to claim 3, characterized in that: The guide sleeve (3) comprises: A guide sleeve body (31), wherein the guide sleeve body (31) is sleeved on the outer side of the screw body (22) and has a through hole (32) extending vertically therethrough; An upper limit platform (33), the upper limit platform (33) is integrally and horizontally arranged on the inner side of the top of the guide sleeve body (31), and a center hole (34) passing through the screw body (22) is opened at the center, the inner diameter of the center hole (34) is smaller than the inner diameter of the spring (4), the outer diameter of the upper limit platform (33) is larger than the outer diameter of the spring (4), and the above; A lower limiting platform (35) is integrally and horizontally arranged on the outer side of the bottom of the guide sleeve body (31), and the outer diameter of the lower limiting platform (35) is not less than the inner diameter of the groove (14).

5. The anti-static hand screw for circuit boards according to claim 4, characterized in that: The inner diameter of the central hole (34) is smaller than the outer diameter of the external thread (23).

6. The anti-static hand screw for circuit boards according to claim 5, characterized in that: A detachable silicone sleeve (5) is provided on the bottom of the screw connector (2). When the screw connector (2) is screwed to the bottom, the silicone sleeve (5) is sleeved on the external thread (23) of the screw connector (2) to clamp the guide sleeve (3) and the spring (4).

7. The anti-static hand screw for circuit boards according to claim 6, characterized in that: A silicone limiting side wall (36) is also provided on the inner wall of the through hole (32), and the inner diameter of the silicone limiting side wall (36) is smaller than the outer diameter of the silicone sleeve (5).

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