CN212784037U - A kind of interface unit - Google Patents

Abstract

The utility model relates to the technical field of waterproof wiring devices, in particular to a connector with small terminal insertion resistance and easy splicing, which comprises a rubber box provided with a socket, an inner cavity of the rubber box is provided with an elastic clamping hook, and a terminal which penetrates through the socket and extends into the inner cavity of the rubber box, the tail end of the terminal is provided with a waterproof bolt, and one side of the elastic clamping hook adjacent to the terminal is sequentially provided with a first slope part, a horizontal part and a vertical part, wherein the width of the first slope part, the horizontal part and the vertical part is gradually increased along the direction from the socket to the inner cavity of the; one side of the terminal, which is matched with the elastic clamping hook, is sequentially provided with a second slope part, a straight part and a clamping part, wherein the width of the second slope part is gradually reduced along the direction from the socket to the inner cavity of the rubber box; when the terminal is inserted into the inner cavity of the rubber box, the elastic clamping hook deforms under the action of the terminal, the waterproof bolt is attached to the flat part of the connecting part of the transverse part and the vertical part and is inserted into the socket when moving towards the clamping part, and the elastic clamping hook compresses the terminal when the connecting part of the transverse part and the vertical part is embedded into the clamping part.

Description

A kind of interface unit

Technical Field

The utility model relates to a waterproof termination technical field especially relates to a terminal inserts connector that resistance is less.

Background

Binding post is an accessory product for realizing electrical connection, and binding post's use has replaced the not enough of traditional terminal when connecting need weld or winding, and has packed terminal connecting portion, has improved the convenience and the security that electrical equipment connects. During actual production, often set up waterproof gluey ring at the socket edge of gluing the box or on the terminal, avoid because of liquid flows into terminal wiring position, the binding post that causes pollutes or the emergence of electric leakage accident to further promote the security that binding post used.

However, after the traditional terminal is inserted into the rubber box, the terminal is required to be matched with the limiting part in the rubber box so as to avoid looseness in use, and the combined resistance of the waterproof rubber ring and the limiting part to the terminal is large in plugging, so that the insertion difficulty of the terminal is increased.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a connector with small terminal insertion resistance and easy insertion for solving the technical problem of large resistance when the terminal is inserted into the plastic box.

The utility model provides a connector, this connector is including being equipped with socket and inner chamber and having the gluey box of elasticity trip and wearing to establish the socket stretches into the inner chamber of gluey box, tail end are equipped with the terminal of waterproof plug, close on the elasticity trip one side of terminal is equipped with according to the preface along the socket to the inner chamber direction width of gluey box is crescent first slope portion, one end and the horizontal portion that first slope portion is connected and with the perpendicular portion that the other end of horizontal portion is connected.

On the terminal with elasticity trip complex one side is equipped with the edge the socket to the inner chamber direction width of gluing the box reduces second slope portion gradually, with straight portion and dorsad that second slope portion top is connected second slope portion and with the end connection of straight portion, be used for the joint horizontal portion with the block portion at vertical portion connection position.

The elastic clamping hook is used for being deformed under the action of the terminal when the terminal is inserted into the inner cavity of the rubber box, the waterproof bolt is attached to the connecting part of the transverse part and the vertical part and is inserted into the socket when the clamping part moves, and the elastic clamping hook is used for being embedded into the connecting part of the transverse part and the vertical part and pressing the terminal when the clamping part moves.

In one embodiment, the waterproof plug is in interference fit with an inner wall surface of the socket.

In one embodiment, the waterproof plug is provided with a threading hole, the connecting wire penetrates through the threading hole and is connected with the terminal, and the outer surface of the connecting wire is hermetically connected with the inner surface of the threading hole.

In one embodiment, the waterproof plug is provided with a plurality of annular convex ribs.

In one embodiment, the tail end of the terminal is further provided with a limiting ring, and the waterproof plug is inserted into the limiting ring and abuts against the inner surface of the limiting ring.

In one embodiment, the waterproof plug is in interference fit with the limit ring.

In one embodiment, the limiting ring is a C-shaped structure or a U-shaped structure formed by bending the metal crimping piece.

The connector of the utility model is implemented by sequentially arranging a first slope part, a transverse part and a vertical part on the elastic hook along the direction from the socket to the inner cavity of the rubber box, and sequentially arranging a second slope part, a straight part and a clamping part on the terminal along the direction from the inner cavity of the rubber box to the socket, wherein the second slope part is abutted and extrudes the first slope part to deform the elastic hook in the process that the terminal is inserted into the rubber box, and when the joint of the second slope part and the straight part is abutted against the transverse part, the acting force of the terminal on the elastic hook reaches the maximum; when the straight part is matched with the transverse part, the elastic clamping hook gradually recovers elastic deformation, the terminal slides relative to the elastic clamping hook, the acting force of the terminal on the elastic clamping hook gradually decreases, in the process, the waterproof bolt is gradually embedded into the socket, and the resistance of the inner wall of the socket on the waterproof bolt gradually increases; when the transverse part and the vertical part of the elastic clamping hook are connected with the clamping part in an embedded mode, the acting force of the terminal on the elastic clamping hook reaches the minimum, namely the resistance of the elastic clamping hook on the terminal reaches the minimum, the resistance of the inner wall of the socket facing the waterproof plug reaches the maximum, and the terminal is difficult to further insert under the constraint of the elastic clamping hook. Through the peak-shifting matching mode of the two resistances, the resistance of the terminal to the glue box in the process of inserting the terminal is reduced, namely the resistance of the elastic clamping hook to the terminal and the combined resistance of the inner wall of the socket facing the waterproof plug are reduced, so that the inserting difficulty of the terminal is reduced.

Drawings

Fig. 1 is a schematic structural view of a glue box according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a terminal and a waterproof plug assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first matching stage of the terminal and the rubber box according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second stage of the terminal and the rubber box according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a third stage of the terminal and the rubber box according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a fourth stage of the terminal and the rubber box according to an embodiment of the present invention;

fig. 7 is a resistance curve diagram of the terminal and the rubber box matching process in an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1, 2 and 6, the present invention provides a connector with small insertion resistance and easy insertion, which includes a plastic box 100 having a socket 110 and an inner cavity with an elastic hook 120, and a terminal 200 having a waterproof plug 300 at the tail end and penetrating the socket 110 and extending into the inner cavity of the plastic box 100. The glue box 100 is used to isolate the terminal 200 from the environment, so as to prevent the electric arc generated in the wiring process of the terminal 200 from interfering with external environment elements, i.e. to provide a stable environment for the operation of the terminal 200. In practical use, the connector of the present embodiment is equivalent to a male terminal in a wiring device, and the plastic box 100 is inserted into another plastic box 100 or a plastic piece, so that the terminal 200 is electrically connected with a female terminal in another plastic box 100 or a plastic piece, so as to realize transmission of electrical signals. In one embodiment, the inner diameter of the socket 110 of the rubber box 100 is slightly smaller than the outer diameter of the waterproof plug 300, that is, when the waterproof plug 300 is inserted into the socket 110 under the driving of the terminal 200, the waterproof plug 300 is in interference fit with the inner wall surface of the socket 110 to eliminate the gap between the waterproof plug 300 and the inner wall surface of the socket 110, so as to prevent water or other liquid substances from flowing into the inner cavity of the rubber box 100, thereby ensuring the safe use of the connector.

The elastic hook 120 is used for limiting the position of the terminal 200 in the plastic box 100, and prevents the terminal 200 from shaking after being plugged, so that when the terminal 200 is matched with an external terminal, the connection part is loose or the terminal 200 is difficult to be matched, and the reliability of the connector is improved. One side of the elastic hook 120 adjacent to the terminal 200 is sequentially provided with a first slope portion 121, a transverse portion 122 and a vertical portion 123, wherein the width of the first slope portion 121 gradually increases along the direction from the socket 110 to the inner cavity of the rubber box 100, one end of the transverse portion 122 is connected with the first slope portion 121, and the other end of the transverse portion 122 is connected with the vertical portion 123, and the first slope portion 121, the transverse portion 122 and the vertical portion 123 together form a limiting portion of the elastic hook 120 for limiting the movement of the terminal 200. It should be noted that the width of the elastic hook 120 in this embodiment refers to the dimension of the elastic hook 120 in the direction approaching the terminal 200, and similarly, the width of the terminal 200 refers to the dimension of the terminal 200 in the direction approaching the elastic hook 120.

The terminal 200 is used for electrically connecting with an external terminal, so as to realize power taking of electrical equipment or electrical signal transmission between the electrical equipment, and in actual use, the terminal 200 can be used as a female terminal by changing the shape of the plugging part of the terminal 200, which is not described herein again. The waterproof plug 300 serves to increase the airtightness of the cartridge 100 and prevent fluid from penetrating into the inner cavity of the cartridge 100. In one embodiment, the waterproof plug 300 is provided with a threading hole 310, the connecting wire is threaded through the threading hole 310 and connected to the terminal 200, and the outer surface of the connecting wire is hermetically connected to the inner surface of the threading hole 310, so as to guide the electrical signal of the external electrical device into or transmit the electrical signal to the external electrical device through the connecting wire, and ensure the waterproof property of the connector.

The terminal 200 is provided with a second slope portion 210, a straight portion 220 connected to the top end of the second slope portion 210, a clamping portion 230 connected to the end of the straight portion 220 and used for clamping the connection portion between the horizontal portion 122 and the vertical portion 123, a straight portion 220 connected to the top end of the second slope portion 210, a flat portion 210 opposite to the second slope portion 210 and connected to the end of the straight portion 220, the second slope portion 210 is used for matching with the first slope portion 121 to reduce the difficulty of inserting the terminal 200 into the cavity of the rubber box 100, the straight portion 220 is used for matching with the horizontal portion 122 of the elastic hook 120 to facilitate the sliding of the terminal 200 relative to the elastic hook 120 when the straight portion 220 is matched with the horizontal portion 122, and the clamping portion 230 is used for clamping or limiting the connection portion when the terminal is moved to the connection portion between the horizontal portion 122 and the vertical portion 123, i.e. limiting the maximum insertion depth of the terminal 200 in the rubber box 100, and preventing the occurrence of bottom contact breakage problem when the terminal 200 is connected to an external terminal due to an excessively large insertion distance, to extend the life of the terminal 200 and ensure the reliability of the connector.

When the terminal 200 is inserted into the inner cavity of the rubber box 100, the elastic hook 120 is deformed under the action of the terminal 200, specifically, the terminal 200 pushes the elastic hook 120 in the process of being inserted into the inner cavity of the rubber box 100, so that the elastic hook 120 is elastically deformed, and further generates resistance to the terminal 200, the waterproof plug 300 is inserted into the socket 110 when being attached to the flat part 220 at the connecting part of the horizontal part 122 and the vertical part 123 and moving towards the clamping part 230, and is subjected to the gradually increased resistance of the inner wall surface of the socket 110, and the elastic hook 120 compresses the terminal 200 when being embedded into the clamping part 230 at the connecting part of the horizontal part 122 and the vertical part 123. Referring to fig. 1 to 7, wherein a line M in fig. 7 represents a variation of a resistance value of the elastic hook 120 to the terminal 200 as the depth of the terminal 200 inserted into the rubber case 100 increases; line N represents the variation of the resistance value of the inner wall of the socket 110 facing the waterproof plug 300 as the depth of insertion of the terminal 200 into the cartridge 100 increases; the line L represents the variation of the combined resistance of the rubber case 100 to the combination of the terminal 300 and the waterproof plug 300 as the depth of the terminal 200 inserted into the rubber case 100 increases. Specifically, the terminal 200 is inserted into the inner cavity of the rubber box 100, before the second slope portion 210 of the terminal 200 is not matched with the first slope portion 121 of the elastic hook 120, the terminal 200 and the rubber box 100 are in a first matching stage, in this case, the waterproof plug 300 at the tail end of the terminal 200 is not inserted into the socket 110, the resistance of the elastic hook 120 to the terminal 200 and the resistance of the inner wall of the socket 110 facing the waterproof plug 300 are both zero, the resultant force of the two, that is, the insertion resistance of the terminal 200, is also zero, and the terminal 200 is in an initial implantation state.

With the terminal 200 extending into the terminal, when the second slope portion 210 of the terminal 200 contacts the first slope portion 121 of the elastic hook 120, the terminal 200 and the rubber box 100 enter the second matching stage, and in the process that the terminal 200 slides along the first slope portion 121, a gap between the elastic hook 120 and the inner wall of the rubber box 100, into which the terminal 200 is inserted, is reduced, so that the extrusion force of the terminal 200 on the elastic hook 120 is gradually increased, the elastic hook 120 is stressed to generate bending deformation, and the resistance of the elastic hook to the terminal 200 is also gradually increased. When the connection portion of the second slope portion 210 and the straight portion 220 slides to contact with the horizontal portion 122 of the elastic hook 120, the pressing force of the terminal 200 on the elastic hook 120 reaches a peak value, that is, the resistance of the elastic hook 120 on the terminal 200 reaches a maximum value, which can be referred to as a point a in fig. 7. In this case, the waterproof plug 300 is not yet in contact with the inner wall surface of the socket 110, and at this time, the insertion resistance of the terminal 200 is constituted only by the resistance of the elastic hook 120 to the terminal 200.

When the straight portion 220 of the terminal 200 contacts the horizontal portion 122 of the elastic hook 120, the terminal 200 and the glue cartridge 100 enter a third mating stage. Because when the second cooperation stage is finished, the deformation amount of the elastic hook 120 reaches the maximum value, so that the transverse portion 122 of the elastic hook 120 is inclined and lifted, thus, the initial contact area of the flat portion 220 and the transverse portion 122 is smaller, the elastic hook 120 gradually recovers the elastic deformation to match the transverse portion 122 with the flat portion 220, so the acting force of the terminal 200 on the elastic hook 120 gradually decreases until the flat portion 220 is completely attached to the transverse portion 122, the flat portion 220 of the terminal 200 slides relative to the transverse portion 122 of the elastic hook 120, and the acting force of the terminal 200 on the elastic hook 120 and the resistance of the elastic hook 120 on the terminal 200 reach stable values. In the sliding process of the terminal 200, the waterproof plug 300 is inserted into the socket 110 and contacts with the inner wall surface of the socket 110, and receives resistance from the inner wall surface of the socket 110, that is, friction force of the inner wall surface of the socket 110 facing the waterproof plug 300, and the resistance value is increased as the insertion depth of the waterproof plug 300 is increased. In this case, the insertion resistance of the terminal 200 is composed of both the resistance of the elastic hook 120 to the terminal 200 and the resistance of the inner wall of the socket 110 to the waterproof plug 300.

When the engaging portion 230 of the terminal 200 moves to the connecting portion between the horizontal portion 122 and the vertical portion 123 of the elastic hook 120, the convex angle of the connecting portion between the horizontal portion 122 and the vertical portion 123 of the elastic hook 120 is embedded into the engaging portion 230 of the terminal 200, and the terminal 200 and the plastic box 100 enter the fourth matching stage, at this time, the pressing force of the terminal 200 on the elastic hook 120 reaches the minimum value, and the elastic hook 120 returns to the initial state. In this case, the elastic hook 120 has a large constraint force on the terminal 200 in the insertion direction of the terminal 200 to prevent the terminal 200 from being further inserted, that is, the insertion amount of the waterproof plug 300 reaches a maximum value, and also the resistance of the inner wall of the socket 110 facing the waterproof plug 300 reaches a peak value. Because the resistance of the elastic hook 120 to the insertion of the terminal 200 reaches the peak value, the resistance of the inner wall of the socket 110 to the waterproof plug 300 reaches the valley value, and when the resistance of the inner wall of the socket 110 to the waterproof plug 300 reaches the peak value, the resistance of the elastic hook 120 to the insertion of the terminal 200 reaches the valley value, the two are completely staggered, so that the resultant force of the two, namely the resultant resistance of the terminal 200 to the insertion of the rubber box 100 is integrally smaller, and the plugging difficulty of the terminal 200 is reduced.

In one embodiment, the waterproof plug 300 is provided with a plurality of annular ribs 320. Preferably, the annular rib 320 is made of a flexible material such as silicone rubber or rubber. By arranging the plurality of annular convex ribs 320 on the waterproof plug 300, multiple blockage is formed on externally leaked liquid, the liquid leakage path is prolonged, and the waterproof effect of the connector is improved.

In one embodiment, the terminal 200 further has a stop ring 400 at the tail end thereof, and the waterproof plug 300 is inserted into the stop ring 400 and abuts against the inner surface of the stop ring 400. Preferably, the stop collar 400 has a C-shaped structure or a U-shaped structure formed by bending the metal crimping piece. Further, the waterproof plug 300 is in interference fit with the stop collar 400. Through setting up spacing ring 400, before terminal 200 grafting operation, insert spacing ring 400 with waterproof plug 300, like this, spacing ring 400 will compress tightly waterproof plug 300 and wear to establish the connecting wire of waterproof plug 300 to further promote the water-proof effects of connector.

The connector of the utility model is implemented, through setting up first slope portion 121, horizontal portion 122 and vertical portion 123 in proper order along the direction of socket 110 to the inner chamber of the rubber box 100 on the elastic trip 120, and set up second slope portion 210, straight portion 220 and block 230 in proper order along the direction of the inner chamber of the rubber box 100 to the socket 110 on the terminal 200, in the process that the terminal 200 inserts the rubber box 100, the second slope portion 210 butts and extrudes the first slope portion 121, make the elastic trip 120 warp, when the second slope portion 210 butts the horizontal portion 122 with the straight portion 220 junction, the effort of the terminal 200 to the elastic trip 120 reaches the biggest; when the straight portion 220 is matched with the horizontal portion 122, the elastic hook 120 gradually recovers elastic deformation, the terminal 200 slides relative to the elastic hook 120, the acting force of the terminal 200 on the elastic hook 120 gradually decreases, in the process, the waterproof plug 300 is gradually embedded into the socket 110, and the resistance of the inner wall of the socket 110 on the waterproof plug 300 gradually increases; when the connection portion between the horizontal portion 122 and the vertical portion 123 of the elastic hook 120 is inserted into the engaging portion 230, the acting force of the terminal 200 on the elastic hook 120 is minimized, that is, the resistance of the elastic hook 120 on the terminal 200 is minimized, the resistance of the inner wall of the socket 110 facing the waterproof plug 300 is maximized, and the terminal 200 is restrained by the elastic hook 120 and is difficult to be inserted further. The peak-off matching mode of the two resistances reduces the resistance of the terminal 200 in the process of inserting the rubber box 100, namely the resistance of the elastic clamping hook 120 to the terminal 200 and the combined resistance of the inner wall of the socket 110 facing the waterproof plug 300, thereby reducing the plugging difficulty of the terminal 200.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (7)

1. A connector comprises a rubber box (100) provided with a socket (110) and an inner cavity provided with an elastic clamping hook (120), and a terminal (200) which penetrates through the socket (110) and extends into the inner cavity of the rubber box (100) and the tail end of which is provided with a waterproof plug (300), and is characterized in that,

a first slope part (121) with the width gradually increasing along the direction from the inserting opening (110) to the inner cavity of the rubber box (100), a transverse part (122) with one end connected with the first slope part (121) and a vertical part (123) connected with the other end of the transverse part (122) are sequentially arranged on one side, close to the terminal (200), of the elastic clamping hook (120);

a second slope part (210) with the width gradually reduced from the socket (110) to the direction of the inner cavity of the rubber box (100), a straight part (220) connected with the top end of the second slope part (210), a clamping part (230) which is back to the second slope part (210), connected with the end part of the straight part (220) and used for clamping the connecting part of the transverse part (122) and the vertical part (123) are arranged on one side, matched with the elastic clamping hook (120), of the terminal (200);

elasticity trip (120) are in terminal (200) insert when the inner chamber of gluing box (100), receive the effect of terminal (200) is out of shape, waterproof bolt (300) are in horizontal portion (122) with erect portion (123) connection site laminating straight portion (220) and to insert when block portion (230) remove socket (110), elasticity trip (120) are in horizontal portion (122) with erect portion (123) connection site embedding compress tightly during block portion (230) terminal (200).

2. The connector according to claim 1, wherein the waterproof plug (300) is interference fitted with an inner wall surface of the socket (110).

3. The connector of claim 2, wherein the waterproof plug (300) is provided with a threading hole (310), the connecting wire is threaded through the threading hole (310) and connected with the terminal (200), and the outer surface of the connecting wire is hermetically connected with the inner surface of the threading hole (310).

4. A connector according to any of claims 2 or 3, wherein the water stop (300) is provided with a plurality of annular ribs (320).

5. The connector according to claim 4, wherein a stop ring (400) is further provided at the tail end of the terminal (200), and the waterproof plug (300) is inserted into the stop ring (400) and abuts against the inner surface of the stop ring (400).

6. The connector of claim 5, wherein the waterproof plug (300) is an interference fit with the stop collar (400).

7. The connector according to claim 5, wherein the retainer ring (400) has a C-shaped structure or a U-shaped structure formed by bending a metal crimping piece.

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