Damage-proof contact element and connector using same

Abstract

An anti-damage contact element and a connector using the same, the anti-damage contact element comprises a sleeve and a pawl spring, two ends of the sleeve are respectively a front end provided with a pin and a rear end used for installing the pawl spring, the rear end of the sleeve is provided with a blind hole used for the pawl spring to be inserted in an interference manner, and a jack at the rear end of the pawl spring is provided with a guide inclined plane. The guiding inclined surface enables the caliber of the socket to contract from the rear end to the front end. The connector comprises a shell and an insulator assembly, the insulator assembly comprises an insulator, the anti-damage contact piece and a positioning plate, a guide inclined plane is additionally arranged at the rear end of the pawl spring in the contact piece to prevent insertion damage of a contact pin inserted into the pawl spring, and the positioning plate is installed on the contact pin of the insulator to prevent the contact pin from being bent due to stress.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to an anti-damage contact piece and a connector using the contact piece. Background Art

[0002] At present, many connector sockets use wire spring holes as the contact parts of the sockets, such as Figure 1 As shown, the wire spring hole contact is composed of a rear sleeve 3, an inner sleeve 4 and a protective sleeve 5. Its structure is complex, especially the assembly of the wire spring wire in the inner sleeve is difficult and the cost is relatively high. In addition, as the number of insertions increases, the hole is prone to weakness. In order to save costs and simplify the structure of the contact, a new type of socket contact needs to be developed. To solve this problem, a claw spring is installed in the blind hole instead of the existing wire spring. The rear end face of the claw spring in the prior art is a plane. If the pin that cooperates with the claw spring is pressed against the plane, it may cause damage to the pin inserted into the claw spring.

[0003] Furthermore, when the current connector is plugged into a printed circuit board, the contact pins are prone to bending when subjected to force because the pins are numerous and thin. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an anti-damage contact and a connector using the contact. A guiding slope is added to the rear end of the claw spring inside the contact to prevent the pin inserted into the claw spring from being damaged during insertion. In addition, a positioning plate is installed on the contact pin of the insulator to prevent the contact pin from being bent due to force.

[0005] In order to achieve the above technical objectives, the adopted technical solution is: an anti-damage contact part, including a sleeve and a claw spring, the two ends of the sleeve are respectively a front end with a pin and a rear end for installing the claw spring, the rear end of the sleeve is provided with a blind hole for interference insertion of the claw spring, and the rear end socket of the claw spring is provided with a guide bevel, which causes the socket diameter to shrink from the rear end to the front end.

[0006] Furthermore, the blind hole is a two-stage step hole, the aperture of the step hole decreases from the rear end to the front end, the step hole includes a small diameter hole and a large diameter hole, and the large diameter hole is used for interference fit insertion of the claw spring.

[0007] Furthermore, the bottom of the small-diameter hole is a conical surface.

[0008] Furthermore, the small diameter hole is communicated with a side hole penetrating through the wall of the casing.

[0009] Furthermore, the rear end of the sleeve has a riveting structure for fixing the claw spring after riveting.

[0010] Furthermore, the sleeve and the pin are integrally formed.

[0011] A connector includes a shell and an insulator assembly, the insulator assembly is installed in the shell, the insulator assembly includes an insulator, the anti-damage contact and a positioning plate, multiple anti-damage contacts are installed in the insulator, the positioning plate is provided with through holes for inserting pins, at least part of the through holes on the positioning plate are interference fit with the corresponding pins, so that the positioning plate is set in an installation position to prevent the pins from being bent due to force.

[0012] Furthermore, upper and lower protrusions are respectively provided on the front and rear surfaces of the positioning plate, and the positioning plate also has a welding position, and the positioning plate is pushed backward until the lower protrusion contacts the insulator to reach the welding position; when in the welding position, the printed circuit board contacts and cooperates with the upper protrusion to form a tin-penetrating gap between the positioning plate and the printed circuit board.

[0013] Furthermore, the insulator is provided with a groove for the positioning plate to be embedded and matched when in the welding position.

[0014] Furthermore, the insulator is provided with a boss for supporting the printed circuit board.

[0015] The beneficial effects of the utility model are:

[0016] 1. A guiding slope is provided at the rear end socket of the claw spring, and the size of the socket shrinks from the rear end to the front end, so that the pin inserted into the claw spring can be inserted into the claw spring in a guided manner to prevent the pin inserted into the claw spring from being damaged by hitting the plane.

[0017] 2. Designing the blind hole as a two-stage step hole can increase the insertion length of the pin inserted into the claw spring, making the cooperation with the claw spring more stable.

[0018] 3. The bottom of the small-diameter hole is designed to be conical, which can match the end of the pin inserted into the claw spring to achieve reasonable avoidance and prevent the pin from being bent.

[0019] 4. There is a side hole connected to the side of the small diameter hole, which helps the electrolyte to be electroplated completely when the blind hole is small.

[0020] 5. The claw spring is fixed with a riveting structure, which has reliable connection, high riveting efficiency, low cost, and can be mechanized.

[0021] 6. The pin and the sleeve are formed in one piece to simplify the structure of the contact, reduce costs, reduce installation, and increase service life.

[0022] 7. All the pins of the connector are first inserted into a positioning plate. The positioning plate can be positioned by interference fit between several through holes of the positioning plate and the pins to prevent the pins from being bent due to stress.

[0023] 8. When welding the connector to the printed circuit board, there is no need to remove the positioning plate. The positioning plate can be directly pressed down. Through the upper protrusion of the positioning plate, a tin-penetrating gap is formed between the positioning plate and the printed circuit board, which is conducive to the solder penetrating downward in the solder hole of the printed circuit board, improving the pin welding efficiency and welding reliability; the welding position of the positioning plate is also determined by the lower protrusion of the positioning plate, which will not cause the contact to be forced out.

[0024] 9. A groove is provided on the insulator to fit into the positioning plate when it reaches the welding position. The installation can be identified according to the shape of the groove to prevent wrong installation.

[0025] 10. In order to further improve the flatness of the printed circuit board, a boss for supporting the printed circuit board can be added to the insulator to limit the downward pressure position of the printed circuit board. When there is no positioning plate, it plays the role of the main support. When there is a positioning plate, it prevents excessive downward pressure and damage to the positioning plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the prior art;

[0027] Figure 2 It is a cross-sectional view of the contact piece of the utility model;

[0028] Figure 3 It is an exploded view of the contact piece of the utility model;

[0029] Figure 4 It is an exploded view of the connector of the utility model;

[0030] Figure 5 This is a structural schematic diagram of the positioning plate of the utility model being located at the installation position;

[0031] Figure 6 This is a structural schematic diagram of the positioning plate of the utility model being located at the welding position;

[0032] Figure 7 It is a cross-sectional structural schematic diagram of the positioning plate of the utility model in the welding position;

[0033] Reference numerals:

[0034] 1. Shell;

[0035] 2. Insulator components;

[0036] 21, insulator; 211, groove; 212, boss;

[0037] 22. Anti-damage contact parts;

[0038] 221, casing; 221-1, blind hole; 221-11, large diameter hole; 221-12, small diameter hole; 221-12, side hole;

[0039] 222, pin;

[0040] 223, claw spring; 223-1, guiding slope; 223-2, riveting structure;

[0041] 23, positioning plate; 231, through hole; 232, upper protrusion, 233, lower protrusion;

[0042] 3. Back sleeve; 4. Inner sleeve; 5. Sheath; 6. Printed circuit board; 7. Tin penetration gap. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0044] In the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integral connection. A person of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0046] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0047] like Figure 3 As shown, an anti-damage contact part includes a sleeve 221, a pin 222 and a claw spring 223. The two ends of the sleeve 221 are respectively a front end provided with the pin 222 and a rear end for installing the claw spring 223. The front end structure of the sleeve 221 adopts a structure that is plugged in and plugged into the insulator 21. The pin 222 is used for plugging with the printed circuit board 6 and then welding. The rear end of the sleeve 221 is provided with a blind hole 221-1 for interference insertion of the claw spring 223.

[0048] like Figure 2As shown, the front end surface of the claw inner sleeve in the prior art is a plane. If the pin hits the plane, it may cause damage to the pin. The rear end of the claw spring 223 is provided with a guiding slope 223-1 to guide the pin of the adapter connector to enter. The socket refers to the part where the end of the pin of the adapter that is plugged into the connector first contacts and inserts. The guiding slope 223-1 shrinks the diameter of the socket from the rear end to the front end, that is, the size of the socket gradually decreases from the rear end to the front end. This structure allows the pin of the adapter to be inserted into the claw spring 223 in a guided manner without causing damage.

[0049] The claw spring is made of brass and rolled into a round shape after stamping. Figure 3 The eagle claw spring or reverse spring claw shown only needs to be able to be interference fit in the blind hole 221-1, have a cavity in the center suitable for inserting the adapter pin, and have a spring claw structure that can grasp the pin.

[0050] like Figure 2 As shown, the blind hole 221-1 is a two-stage step hole, and the aperture of the step hole decreases from the rear end to the front end. The step hole includes a small-diameter hole 221-12 and a large-diameter hole 221-11. The large-diameter hole 221-11 is used for interference fit insertion of the claw spring 223. After the adapter pin is inserted into the claw spring 223, it can continue to be pushed forward to increase the length of the insertion, so that the adapter pin and the claw spring 223 are more firmly matched. The front end of the adapter pin inserted into the small-diameter hole 221-12 does not contact the small-diameter hole 221-12. The small-diameter hole 221-12 acts as a avoidance hole to prevent the pin from being touched and bent.

[0051] like Figure 2 As shown, the bottom of the small-diameter hole 221 - 12 is a cone, which is consistent with the shape of the front end of the adapter pin and can better avoid the front end of the pin.

[0052] like Figure 2 As shown, if the diameter-depth ratio of the blind hole 221-1 is relatively small, the electroplating integrity in the blind hole is not affected, and there is no need to add a side hole 221-13. If the diameter-depth ratio of the blind hole 221-1 is relatively large, the electrolyte cannot be completely electroplated when entering the blind hole. This requires opening a side hole 221-13 that penetrates the wall of the sleeve 221 on the sleeve 221 of the small-diameter hole 221-12 for the outflow of the electrolyte or as a vent to ensure complete electroplating of the electrolyte.

[0053] like Figure 2As shown, the rear end of the sleeve 221 has a riveting structure 223-2 for fixing the claw spring 223 after riveting. The riveting structure is a port with a smaller thickness reserved at the rear end of the sleeve 221. After the claw spring 223 is installed, the port is riveted to fix the claw spring 223 inside the blind hole. The claw spring 223 will not be separated from the blind hole, but the riveted structure will not cover the guiding inclined surface 223-1. The riveting structure is located at the rear end of the sleeve 221, and the claw spring 223 can be fixed by mechanical processing without adding additional fixing parts. It has high production efficiency and is easy to install. Compared with the existing wire spring hole, the cost is reduced and the mechanical life is improved.

[0054] like Figure 2 , Figure 3 As shown, the sleeve 221 and the pin 222 are integrally formed. The contact structure is composed of only two integrally formed parts, the sleeve 221 and the claw spring 223, which is simple and easy to produce, saves the connection structure, reduces the process steps, and greatly reduces the cost.

[0055] like Figure 4 , Figure 5 , Figure 6 As shown, a connector includes a shell 1 and an insulator component 2, the insulator component 2 is installed in the shell 1, the insulator component 2 includes an insulator 21, the above-mentioned anti-damage contacts 22 and a positioning plate 23, the rear ends of the plurality of anti-damage contacts 22 are installed in the insulator 21, the front end pins extend beyond the surface of the insulator 21 for welding with the printed circuit board 6, the positioning plate 23 is provided with through holes 231 for inserting the pins 222, the pins 222 are arranged in a one-to-one correspondence with the through holes 231, the pins 222 are inserted into the through holes 231, at least part of the through holes 231 on the positioning plate 23 are interference fit with the pins 222, a non-full interference fit is adopted to facilitate the disassembly and movement of the positioning plate 23, the interference fit position is optimally selected at the outer ring or the four-pin position, in order to ensure the stability of the positioning plate 23 in the installation position, the through holes 231 and the pins 222 can also be fully interference fit. Before the connector is welded to the printed circuit board 6, the positioning plate 23 is set in the installation position to prevent the pin 222 from bending due to stress, so that the positioning plate 23 is suspended in the air to prevent the soldering pin from bending due to stress. The stress is not limited to the downward pressure on the printed circuit board 6, but may also be hit or bumped during transportation and installation. The positioning plate 23 mainly plays the role of fixing the pin 222 to prevent the contact from bending as much as possible. When the printed circuit board and the contact are welded, according to the press Figure 5 As shown in the figure, the positioning plate 23 is moved downward in the up-down direction to leave a gap between the positioning plate 23 and the printed circuit board 6. The positioning plate 23 can also be directly removed to allow the printed circuit board 6 to be plugged into the pins 222 and then welded. Figure 5 As shown, the insulator assembly 2 may also include a thick pin 222 on the left side of the figure, and this type of pin may be optionally equipped with a positioning plate 23 as required.

[0056] like Figure 5 As shown, if there is no need to move the positioning plate 23 separately and to leave a gap for soldering tin between the positioning plate 23 and the printed circuit board 6, an upper protrusion 232 and a lower protrusion 233 may be provided on the front and rear (upper and lower) surfaces of the positioning plate 23, respectively. The pin 222 is also provided with a positioning plate 23 that is forced to move from the installation position to the welding position when the connector can be soldered with the printed circuit board 6. The printed circuit board 6 and the pin 222 are plugged in and installed to press down and contact the upper protrusion 232. At this time, the pin 222 above the positioning plate 23 is shorter and will not bend. When the upper end pin 222 is inserted into the printed circuit board 6, the positioning plate 23 is pushed backward, and the positioning plate 23 can be used as a guide plate or an anti-deflection plate until the lower protrusion 233 contacts the insulator 21 and reaches the soldering position. The thickness of the upper protrusion 232 is the thickness of the tin-transmitting gap 7. That is, when the connector is mated with the printed circuit board 6, there is no need to remove the positioning plate 23, but the positioning plate 23 is pressed toward the plug-in end of the connector to achieve Figure 6 At the welding position, an upper protrusion 232 is provided on the positioning plate 23, mainly to form a gap between the positioning plate 23 and the printed circuit board 6 after the positioning plate 23 is pushed backward. The existence of the gap is conducive to the penetration of tin when the soldering pin is welded to the printed circuit board. The lower protrusion 233 creates a gap between the positioning plate 23 and the insulator 21 to prevent the anti-damage contact 22 from being pressed down and being dislodged from the insulator 21.

[0057] like Figure 5 , Figure 6 As shown, the insulator 21 is provided with a groove 211 for the positioning plate 23 to be embedded in the welding position. By designing a special structure, the installation direction of the positioning plate can be quickly determined, which reduces the confirmation time and prevents errors. When the positioning plate 23 is embedded in the groove 211, the position of the positioning plate 23 can be stabilized to prevent the positioning plate 23 from shaking, thereby improving the structural stability of the connector.

[0058] like Figure 6 As shown, the insulator 21 is provided with a boss 212 for supporting the printed circuit board 6. The boss 212 structure can be applied to two situations: using the positioning plate 23 to penetrate tin and directly penetrating tin without using the positioning plate 23. When using the positioning plate 23 to penetrate tin, refer to the description of pressing the positioning plate 23 to the welding position, the boss 212 is located on the outside of the positioning plate 23, and the plane where the top surface of the boss 212 used to support the printed circuit board 6 coincides with the plane where the top surface of the upper protrusion 232 is located. The boss 212 and the upper protrusion 232 cooperate to support the printed circuit board 6, and can limit the pressing limit of the printed circuit board 6, which has a reminder effect to prevent the printed circuit board 6 from being pressed down with too much force to damage the positioning plate 23 or itself; when the positioning plate 23 is not used, it can also play a role in supporting the printed circuit board 6, so that there is a gap between the insulator 21 and the printed circuit board 6 through which tin can penetrate.

[0059] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An anti-damage contact, comprising a sleeve (221) and a claw spring (223), wherein the sleeve (221) has a front end provided with a pin (222) and a rear end for mounting the claw spring (223), and the rear end of the sleeve (221) is provided with a blind hole (221-1) for interference insertion of the claw spring (223), characterized in that: A guiding inclined surface (223-1) is provided at the rear end socket of the claw spring (223), and the guiding inclined surface (223-1) causes the socket diameter to shrink from the rear end to the front end.

2. The damage-resistant contact member according to claim 1, characterized in that: The blind hole (221-1) is a two-stage step hole, the diameter of the step hole decreases from the rear end to the front end, the step hole comprises a small diameter hole (221-12) and a large diameter hole (221-11), and the large diameter hole (221-11) is used for interference fit insertion of the claw spring (223).

3. An anti-damage contact member according to claim 2, characterized in that: The bottom of the small-diameter hole (221-12) is a conical surface.

4. An anti-damage contact piece according to claim 2 or 3, characterized in that: The small-diameter hole (221-12) is in communication with a side hole (221-13) that passes through the wall of the sleeve (221).

5. The damage-resistant contact member according to claim 1, characterized in that: The rear end of the sleeve (221) is provided with a riveting structure (223-2) for fixing the claw spring (223) after riveting.

6. The damage-resistant contact member according to claim 3, characterized in that: The sleeve (221) and the insertion pin (222) are integrally formed.

7. A connector, comprising a housing (1) and an insulator assembly (2), wherein the insulator assembly (2) is mounted in the housing (1), characterized in that: The insulator assembly (2) comprises an insulator (21), an anti-damage contact piece (22) as claimed in any one of claims 1 to 6, and a positioning plate (23), wherein a plurality of anti-damage contact pieces (22) are installed in the insulator (21), and the positioning plate (23) is provided with through holes (231) for inserting pins (222), and at least part of the through holes (231) on the positioning plate (23) are interference fit with the corresponding pins (222), so that the positioning plate (23) is arranged at an installation position that prevents the pins (222) from being bent due to force.

8. A connector according to claim 7, characterized in that: The front and rear surfaces of the positioning plate (23) are respectively provided with an upper protrusion (232) and a lower protrusion (233). The positioning plate (23) also has a welding position. The positioning plate (23) is pushed backward until the lower protrusion (233) contacts the insulator (21) and reaches the welding position. When in the welding position, the printed circuit board (6) contacts and cooperates with the upper protrusion (232) to form a tin-penetrating gap (7) between the positioning plate (23) and the printed circuit board (6).

9. A connector according to claim 8, characterized in that: The insulator (21) is provided with a groove (211) for the positioning plate (23) to be embedded and matched when in the welding position.

10. A connector according to claim 7 or 8, characterized in that: The insulator (21) is provided with a boss (212) for supporting the printed circuit board (6).

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