Terminal connector

Abstract

The invention discloses a terminal connector which comprises a connector shell, a buckle, a waterproof ring, a tail plug and a plurality of terminals. The connector shell comprises an outer shell body, the front end of the outer shell body is provided with a plugging cavity, the rear end of the outer shell body is provided with terminal limiting cavities, the front end of each terminal limiting cavity is communicated with the plugging cavity through a pin hole, the terminals are located in the terminal limiting cavities, insertion tongues of the terminals extend into the plugging cavity, clamping grooves are formed in the outer shell body above the pin holes, and the clamping grooves are communicated with the terminal limiting cavities. The terminal buckle is inserted and fixed in the clamping groove, a first step part and a second step part are formed at the lower end of the terminal buckle, and the first step part and the second step part are in compression joint with corresponding parts of the terminal; the waterproof ring is arranged at the rear end of the plugging cavity in an interference fit mode, and the tail plug is arranged at the rear end of the outer shell in an interference fit mode. And a forward and downward retaining elastic sheet is formed at the top of each terminal limiting cavity of the outer shell and behind the corresponding terminal buckle. The terminal is good in stability and waterproof performance, and meanwhile the problem of terminal pin withdrawing is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of connectors, and particularly relates to a terminal connector. Background Art

[0002] A connector is a component often contacted by electronic engineering technicians. It usually includes a male connector and a female connector. The male and female connectors mostly adopt a plug-and-play design, and the current or signal is quickly connected and disconnected through the plug-and-lock structure of the plug-and-play structure.

[0003] In the existing connectors, the terminals are prone to skew, and during the plug-and-play connection, the internal structure has poor stability, and there is a defect that the terminals are retracted from the pins during long-term plugging and unplugging. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a terminal connector to solve the problems of poor internal structure stability, easy terminal skew and terminal pin retraction in the existing connectors.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present invention is: A terminal connector includes a connector housing and a plurality of terminals arranged at intervals inside the connector housing; characterized in that it further includes a terminal buckle, a waterproof ring and a tail plug arranged inside the connector housing; the connector housing includes an outer housing, a plug-and-play cavity is provided at the front end of the outer housing, and a terminal limiting cavity with the same number as the terminals is isolated and arranged at the rear end of the outer housing. The front end of each terminal limiting cavity is communicated with the plug-and-play cavity through a pin hole. The terminal is located in the terminal limiting cavity, and its front end tongue extends into the plug-and-play cavity from the pin hole. A card slot is formed above the pin hole on the outer housing, and the terminal buckle is inserted and fixed in the card slot. A first step portion is formed at the lower end of the terminal buckle in the terminal limiting cavity, and a second step portion lower than the first step portion is formed in the pin hole. The first step portion and the second step portion press the corresponding parts of the terminal; the waterproof ring is in interference fit with the rear end of the plug-and-play cavity, and the inner hole of the waterproof ring is in interference fit with the outer dimension of the insertion end of the mating connector inserted into the plug-and-play cavity. The tail plug is in interference fit with the rear end of the outer housing, and the tail plug is provided with a cable hole at the position corresponding to each terminal limiting cavity; a retaining spring sheet is formed at the top of each terminal limiting cavity on the outer housing and behind the terminal buckle.

[0006] Furthermore, it further includes an inner housing. The outer housing is provided with limiting grooves at the upper and lower ends of the plug-and-play cavity and in front of the waterproof ring, and limiting holes are provided on both sides of the plug-and-play cavity and in front of the waterproof ring. The inner housing is correspondingly provided with limiting blocks matching the limiting grooves and clamping blocks matching the limiting holes. The inner housing and the outer housing are mutually limited through the limiting grooves and the limiting blocks and are clamped and connected through the clamping blocks and the limiting holes.

[0007] Further, the inner dimension of the inner housing is between the outer dimension and the inner dimension of the waterproof ring, and a guiding groove is further provided at the lower end of the inner housing.

[0008] Further, a slot is provided in the middle of the top of the front end of the inner housing, and a card hole is provided above the slot in the outer housing to cooperate with the hook of the connector inserted externally.

[0009] Further, an elastic pressing piece is connected to the outer wall of the outer housing and behind the card hole, a convex block is provided on the lower surface of the front end of the pressing piece, and the convex block is directly above the card hole.

[0010] Further, retaining pieces are provided on both sides outside the elastic pressing piece of the outer housing, and the top surface of the retaining pieces is higher than the top surface of the elastic pressing piece.

[0011] Further, a front convex block and a rear convex block are both provided at intervals on both sides of the rear end of the terminal buckle, guiding surfaces are provided on both the front convex block and the rear convex block, and the convex blocks on both sides are symmetrically arranged, and anti - detachment convex platforms that can be inserted into the gaps between the front convex block and the rear convex block are symmetrically provided on both sides of the outer housing.

[0012] Further, a plurality of annular grooves are provided at intervals on the outer surfaces of both the waterproof ring and the tail plug.

[0013] Further, the terminal is provided with a horizontal lower surface, and the terminal limiting cavity is provided with a supporting surface that is in contact with the lower surface of the terminal.

[0014] Further, a protrusion is provided below the box part of the terminal, and a relief groove is provided at the center of the top of the terminal limiting cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a terminal limiting cavity, a pin hole and a card slot in the connector housing, inserting a terminal buckle, pressing the terminal by the first step portion and the second step portion of the terminal buckle, and using the anti - retreat elastic piece to limit the box part of the terminal, the present invention makes the terminal in the installed connector have good stability, and at the same time solves the problem of terminal pin retreat caused by long - term plugging and unplugging; in addition, by providing a waterproof ring and a tail plug at the rear end of the plug - in cavity and the rear end of the terminal limiting cavity respectively, the waterproof function of the connector is enhanced.

[0016] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above - mentioned and other purposes, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Brief Description of the Drawings

[0017] Figure 1 This is the state diagram of the terminal connector of the present invention when in use; Figure 2 It is Figure 1 the enlarged view of part A of; Figure 3 This is the front structural schematic diagram of a terminal installed in the connector housing of the present invention; Figure 4 It is Figure 3 the sectional view taken along the line B - B in; Figure 5 It is Figure 3 the sectional view taken along the line C - C in; Figure 6 It is Figure 5 the enlarged view of part D in; Figure 7 This is the exploded view of the connector housing of the present invention; Figure 8 This is the sectional view of the outer housing of the present invention; Figure 9 This is the structural schematic diagram of the terminal of the present invention; Figure 10 This is the structural schematic diagram of the terminal buckle of the present invention; Figure 11 This is the anti - detachment structural schematic diagram formed by the front and rear bumps and the anti - detachment boss of the present invention; Figure 12 This is the structural schematic diagram of the waterproof ring of the present invention; Figure 13 This is the structural schematic diagram of the tail plug of the present invention.

[0018] The reference numerals and corresponding names in the figure are: 1. Connector housing, 11. Outer housing, 110. Plug - and - unplug cavity, 1101. Limit groove, 1102. Limit hole, 111. Terminal limit cavity, 1111. Support surface, 1112. Relief groove, 112. Pin hole, 113. Card slot, 114. Anti - reverse elastic piece, 1141. Notch, 116. Card hole, 117. Elastic pressing piece, 1171. Pressing block, 118. Flap, 119. Anti - detachment boss, 12. Inner housing, 121. Limit block, 122. Clamping block, 123. Guide groove, 124. Slot, 2. Terminal, 21. Insert tongue, 22. Box part, 23. Protrusion, 3. Terminal buckle, 31. First step part, 32. Second step part, 33. Front convex block, 34. Rear convex block, 4. Waterproof ring 41. Annular groove, 5. Tail plug, 51. Cable hole 52. Annular groove, 6. Plug-in connector, 61. Hook Detailed implementation mode

[0019] A terminal connector, as Figure 1-8 shown, the terminal connector includes a connector housing 1 and terminal buckles 3, waterproof rings 4, tail plugs 5 arranged inside the outer housing 11, and a plurality of terminals 2 arranged at intervals inside the connector housing 1. Among them, the connector housing 1 includes an outer housing 11. The front end of the outer housing 11 is provided with a plug-in cavity 110. The rear end of the outer housing 11 is isolated and provided with terminal limiting cavities 111 having the same number as the terminals 2. The front end of each terminal limiting cavity 111 is communicated with the plug-in cavity 110 through a pin hole 112. The outer housing 11 forms a card slot 113 above the pin hole 112. The card slot 113 communicates with all the pin holes 112, as well as the terminal limiting cavities 111 at the rear end and the plug-in cavity 110 at the front end. The outer housing 11 forms an integrally formed and forward-downward anti-retreat elastic piece 114 at the top of each terminal limiting cavity 111 and behind the first step portion 31 of the terminal buckle 3. A notch 1141 is provided at the front lower corner of the anti-retreat elastic piece 114. The terminal 2 is located in the terminal limiting cavity 111, and its front insertion tongue 21 extends into the plug-in cavity 110 from the pin hole 112. The rear end of the terminal buckle 3 is inserted and limited and fixed in the card slot 113. The waterproof ring 4 is arranged at the rear end of the plug-in cavity 110. Its outer dimension is in interference fit with the side wall of the plug-in cavity 110. The inner hole of the waterproof ring 4 is in interference fit with the outer dimension of the insertion end of another plug-in connector 6 that matches this connector. The tail plug 5 is in interference fit and arranged at the rear end of the outer housing 11. And the tail plug 5 is provided with a cable hole 51 corresponding to each terminal limiting cavity 111 for leading out the cable at the rear end of the terminal 2.

[0020] As Figure 9 shown, the terminal 2 is provided with a horizontal lower surface, and the terminal limiting cavity 111 is provided with a supporting surface 1111 that is in contact with the lower surface of the terminal 2. The terminal 2 is provided with a protrusion 23 below its box portion 22. Correspondingly, a relief groove 1112 is provided at the top of the terminal limiting cavity 111.

[0021] As Figure 10 shown, a first step portion 31 is formed in the middle of the terminal buckle 3 in each terminal limiting cavity 111. The front end of the terminal buckle 3 correspondingly forms a second step portion 32 lower than the first step portion 31 in each pin hole 112. The first step portion 31 and the second step portion 32 press the corresponding parts of the terminal 2 below them. Preferably, the first step portion 31 and the second step portion 32 are provided with inclined guiding surfaces.

[0022] As Figure 12 、 13As shown, a plurality of annular grooves 41 and 52 are provided at intervals on the outer surfaces of the waterproof ring 4 and the tail plug 5, and the inner surface of the waterproof ring 4 and the surface of the cable hole 51 of the tail plug 5 also correspondingly adopt an annular structure with alternating concave and convex surfaces.

[0023] In the present invention, a terminal limiting cavity, a pin hole and a card slot are arranged in the connector housing, and a terminal buckle is inserted into the card slot. By means of the first step portion and the second step portion of the terminal buckle pressing the corresponding parts of the terminal and the inclined guiding surfaces of the two step portions, the direction deviation during the insertion of the terminal can be corrected, and then the terminal can be guided back to the correct position. The first step portion and / or the second step portion can be used to press and limit the terminal, so that the terminal is stably located in the terminal limiting cavity. In addition, a notch is opened at the lower front corner of the anti-retreat elastic piece to make way for the box portion of the terminal during the installation of the terminal. After the installation of the terminal in the connector housing is completed, the notch can be in partial contact with the box portion of the terminal and limit the terminal to prevent the terminal from retracting. Therefore, the present invention improves the stability of the internal structure of the connector and solves the problem of terminal pin withdrawal caused by long-term plugging and unplugging. By respectively arranging an interference-fitting waterproof ring and a tail plug at the rear ends of the plugging cavity and the terminal limiting cavity, the annular concave-convex surface structure forms a multi-stage seal, enhancing the waterproof function of the connector. By setting the lower surface of the terminal to a horizontal plane, in the present invention, the lower surfaces of the front end plug tongue and the rear end wiring part of the existing unequal-height terminals are set to a horizontal plane of the same height, and a protrusion is arranged below the terminal box portion. The terminal limiting cavity is correspondingly provided with a horizontal supporting surface and a relief groove for limiting the protrusion. By cooperating with the terminal buckle for pressing, the effective fitting surface between the terminal and the terminal limiting cavity is also increased, further ensuring the stability after the terminal is installed.

[0024] Preferably, as Figure 7 、 8As shown in the figure, the outer housing 11 is provided with limiting grooves 1101 at both the upper and lower ends of the plugging cavity 110 in front of the waterproof ring 4, and limiting holes 1102 are provided on both sides of the plugging cavity 110 in front of the waterproof ring 4. The inner housing 12 is inserted into the front end of the plugging cavity 110 of the outer housing 11, and limiting blocks 121 and clamping blocks 122 that cooperate with the limiting grooves 1101 and the limiting holes 1102 are provided. The inner housing 12 and the outer housing 11 are mutually limited by the limiting grooves 1101 and the limiting blocks 121 and are connected by clamping the clamping blocks 122 with the limiting holes 1102. The inner size of the inner housing 12 is between the outer size and the inner size of the waterproof ring 4. A guiding groove 123 is provided in the middle of the limiting block 121 at the lower end of the inner housing 12. An opening groove 124 is provided in the middle of the top of the front end of the inner housing 12, and a clamping hole 116 that cooperates with the hook 61 of the connector 6 inserted externally is provided above the opening groove 124 of the outer housing 11. An integrally formed elastic pressing piece 117 is connected to the outer wall of the outer housing 11 and behind the clamping hole 116. A downwardly convex pressing block 1171 is provided on the lower surface of the front end of the elastic pressing piece 117, and the pressing block 1171 is directly above the clamping hole 116. The outer housing 11 is provided with retaining pieces 118 on both sides outside the elastic pressing piece 117, and the top surface of the retaining pieces 118 is higher than the top surface of the elastic pressing piece 117.

[0025] More preferably, the limiting grooves 1101 and the limiting holes 1102 in the upper parts of the plugging cavity 110 and the inner housing 12 both adopt a wedge-shaped structure, the limiting grooves 1101 and the limiting holes 1102 in the lower parts of the plugging cavity 110 and the inner housing 12 both adopt a rectangular structure, and two groups of the limiting grooves 1101 and the limiting holes 1102 in the lower parts of the plugging cavity 110 and the inner housing 12 are arranged at intervals.

[0026] In the present invention, the inner housing is clamped at the front end of the plugging cavity of the outer housing, so that on the one hand, the inner housing can limit the waterproof ring, and on the other hand, by opening an opening groove at the top of the inner housing and providing a guiding groove at the bottom, when the male and female connectors are plugged in, plugging and guiding and limiting can be carried out to ensure the accuracy of the position of the male and female connectors after plugging. In addition, by providing an integrally formed elastic pressing piece at the top of the outer housing, when one of the two plugged male and female connectors is pulled out, by pressing the elastic pressing piece, the lower pressing block presses down the hook of the connector fixed by mutual plugging, so that the hook disengages from the clamping hole, which is more labor-saving and easier than directly pressing the pressing elastic piece integrally formed with the hook near the root in the prior art; through the arrangement of the retaining pieces on both sides, a cover baffle can be provided above the whole formed by the male and female connectors after plugging, so as to prevent an external object from accidentally touching the elastic pressing piece and causing the clamping of the hook and the clamping hole of the male and female connectors to fail (connection loosening).

[0027] Preferably, as Figure 6 、 10As shown in FIGS. 11, on both side surfaces at the rear end of the terminal buckle 3, a front bump 33 and a rear bump 34 are arranged at intervals. Guide surfaces are provided at the rear ends of the front bump 33 and the rear bump 34, and the bumps on both sides are symmetrical to each other. On both sides inside the outer housing 11, an anti - detachment boss 119 that can be inserted into the gap between the front bump 33 and the rear bump 34 is symmetrically arranged. When the terminal buckle 3 is inserted into the card slot 113 to the limit position (the rear - end bayonet of the terminal buckle is isolated from the outer rubber shell), the rear end surface of the anti - detachment boss 119 and the front end surface of the front bump 33 form an anti - detachment surface for abutment and limitation. The first step portion 31 is located in the terminal limiting cavity 111, and the second step portion 32 is located in the pin insertion hole 112. When the terminal buckle 3 is partially inserted into the card slot 113 and the anti - detachment boss 119 is located in the gap between the front bump 33 and the rear bump 34, the rear end surface of the anti - detachment boss 119 and the front end surface of the front bump 33 form a limiting anti - detachment surface. The first step portion 31 is located in the pin insertion hole 112, and the second step portion 32 is located in the plug - and - unplug cavity 110.

[0028] In the present invention, by arranging front and rear bumps on both side surfaces of the terminal buckle and arranging an anti - detachment boss on the outer housing, two - stage anti - detachment is formed on both sides of the terminal buckle between the front and rear bumps and in front of the front bump, which facilitates the installation of the terminal and the terminal buckle, and can also meet the requirements of different terminals.

[0029] The present invention is not limited to the above - mentioned specific embodiments. For those of ordinary skill in the art, starting from the above - mentioned concept, without creative labor, all kinds of transformations made fall within the protection scope of the present invention.

Claims

1. A terminal connector, comprising a connector housing and a plurality of terminals spaced inside the connector housing; characterized in that, It further includes a terminal buckle, a waterproof ring and a tail plug disposed inside the connector housing; the connector housing includes an outer housing, a plugging cavity is provided at the front end of the outer housing, and a terminal limiting cavity with the same number of terminals as the terminals is isolatedly provided at the rear end of the outer housing. The front end of each terminal limiting cavity communicates with the plugging cavity through a pin hole. The terminal is located in the terminal limiting cavity, and its front inserting tongue extends into the plugging cavity from the pin hole. A clamping groove is formed above the pin hole on the outer housing. The terminal buckle is inserted and fixed in the clamping groove. A first step portion is formed in the terminal limiting cavity at the lower end of the terminal buckle, and a second step portion lower than the first step portion is formed in the pin hole. The first step portion and the second step portion press the corresponding parts of the terminal; the waterproof ring is in interference fit with the rear end of the plugging cavity, and the inner hole of the waterproof ring is in interference fit with the outer dimension of the insertion end of the external pluggable connector inserted into the plugging cavity. The tail plug is in interference fit with the rear end of the outer housing, and a cable hole is provided at the tail plug corresponding to each terminal limiting cavity; a retaining elastic piece is formed at the top of each terminal limiting cavity of the outer housing and behind the terminal buckle.

2. The terminal connector according to claim 1, characterized in that, It further includes an inner housing. The outer housing is provided with limiting grooves at the upper and lower ends of the plugging cavity and in front of the waterproof ring, and limiting holes are provided on both sides of the plugging cavity and in front of the waterproof ring. The inner housing is correspondingly provided with limiting blocks matching the limiting grooves and clamping blocks matching the limiting holes. The inner housing and the outer housing are mutually limited through the limiting grooves and the limiting blocks and are connected by clamping the clamping blocks with the limiting holes.

3. The terminal connector according to claim 2, characterized in that, The inner dimension of the inner housing is between the outer dimension and the inner dimension of the waterproof ring, and a guiding groove is further provided at the lower end of the inner housing.

4. A terminal connector according to claim 2, characterized in that, A slot is provided in the middle of the top of the front end of the inner housing, and a clamping hole matching the hook of the external pluggable connector is provided above the slot on the outer housing.

5. A terminal connector according to claim 4, wherein An elastic pressing piece is connected to the outer wall of the outer housing and behind the clamping hole. A pressing block is provided on the lower surface of the front end of the pressing piece, and the pressing block is directly above the clamping hole.

6. The terminal connector according to claim 5, wherein, Blocking pieces are provided on both sides outside the elastic pressing piece on the outer housing, and the top surface of the blocking pieces is higher than the top surface of the elastic pressing piece.

7. The terminal connector according to claim 1, characterized in that Protrusions are symmetrically provided at intervals on both sides of the rear end of the terminal buckle, including a front protrusion and a rear protrusion. The front protrusion and the rear protrusion are both provided with guiding surfaces, and the protrusions on both sides are symmetrically arranged. Anti-detachment protrusions that can be inserted into the gap between the front protrusion and the rear protrusion are symmetrically provided on both sides of the outer housing.

8. A terminal connector according to claim 1, characterized in that, A plurality of annular grooves are provided at intervals on the outer surfaces of the waterproof ring and the tail plug.

9. The terminal connector according to claim 1, wherein The terminal is provided with a horizontal lower surface, and the terminal limiting cavity is provided with a supporting surface that is in contact with the lower surface of the terminal.

10. A terminal connector according to claim 9, characterized in that, A protrusion is provided below the box part of the terminal, and a relief groove is provided at the center of the top of the terminal limiting cavity.

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