Terminal crimping structure

Abstract

The utility model discloses a terminal crimping structure, which comprises a terminal main body and a flexible circuit board, the flexible circuit board is attached to the bottom of the terminal main body, when the terminal crimping structure is used, through the arrangement of a convex hull, a crimping stabbing sheet, a wire skin crimping sheet and a cutting groove, the crimping stabbing sheet and the wire skin crimping sheet only need to be attached to the terminal main body before the terminal crimping. According to the utility model, the crimping of the flexible circuit board can be realized by adding an extra convex hull punching and groove splitting work station, so that the crimping of the flexible circuit board can be realized by using the traditional wire terminal, the terminal does not need to open a new mold, the matched and fixed structure of the terminal and the plastic does not need to be changed, the connector plastic matched with the terminal does not need to be changed, and the connector plastic does not need to open a new mold; and the novel crimping mode is standard and universal, can be applied to connection application of all wire harnesses and terminals of the whole vehicle, has wide market popularization value, and can be popularized to all automobile wire harnesses including new energy automobiles, and the market capacity is about 30 billion.

Description

Technical Field

[0001] The utility model relates to the technical field of wire harness crimping, in particular to a terminal crimping structure. Background Art

[0002] Different from traditional fuel vehicles, the three-electric system of new energy vehicles will increase the weight of the whole vehicle, thereby increasing the power consumption of new energy vehicles during driving and reducing the driving range. For the same model, the weight increase caused by the three-electric system will cause the weight of the whole vehicle to increase by about 200-300kg, that is, the weight of a new energy vehicle when empty is almost equivalent to the weight of a traditional vehicle when fully loaded. At the same time, the lightweight coefficient of new energy vehicles is 1.5-4 times higher than that of traditional fuel vehicles, and the larger the coefficient, the lower the degree of lightweighting of the whole vehicle, so the demand for lightweighting of new energy vehicles is more urgent. The lightweighting of automotive wiring harnesses is an important part of the lightweighting of new energy vehicles.

[0003] In the process of using lighter FFC / FPC to replace traditional electronic wires, how to solve the direct connection between FFC / FPC and terminals is a very important issue. Since the connector interfaces of each component that matches the vehicle wiring harness remain unchanged, the connector interfaces on the corresponding vehicle wiring harness cannot be changed either.

[0004] The existing solution is to use a terminal to pierce the insulation of FFC / FPC and then crimp it. This method can achieve the purpose of lightweighting, but all the terminals and plastics used in the automotive wiring harness need to be made with new molds and customized production. For hundreds of terminals and plastics in the whole vehicle, it will be a huge investment in special equipment. In addition, the tail structure and size of traditional wire terminals are designed for crimping the characteristics of traditional wires. If they are used directly to crimp FFC / FPC, it will lead to insufficient pull-off force and unstable contact resistance. For this reason, we propose a terminal crimping structure. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the utility model is to provide a terminal crimping structure.

[0006] One of the purposes of the utility model is achieved by the following technical solution:

[0007] A terminal crimping structure includes a terminal body and a flexible circuit board, the flexible circuit board is fitted on the bottom of the terminal body, a crimping area is provided on the terminal body, and the crimping area includes a cutting groove and a wire skin crimping piece, the wire skin crimping piece is fitted with the flexible circuit board, a crimping thorn is provided at the bottom of the terminal body, and two convex bumps arranged up and down are fixedly connected to the terminal body, the crimping thorn is inserted into the outer surface of the flexible circuit board, the left and right inner walls of the terminal body are provided with storage grooves, and the left and right sides of the terminal body are provided with anti-falling mechanisms.

[0008] Furthermore, the anti-falling mechanism includes a needle, and the two ends of the needle are respectively located in the inner cavity of the terminal body and the receiving groove, one end of the needle is fixedly connected to a movable shaft, and the rear end of the movable shaft is rotatably connected to the inner wall of the receiving groove, the front end of the movable shaft is fixedly connected to a rotating gear, and the bottom of the rotating gear is meshed with a rack, the bottom of the rack is fixedly connected to a movable plate, and the bottom of the movable plate is fitted with a U-shaped plate, the left and right sides of the movable plate are jointly provided with a square hole, and the inner cavity of the square hole is slidably connected with a square rod, the left and right ends of the square rod are respectively fixedly connected to the left and right sides of the inner cavity of the U-shaped plate, the outer side of the square rod is sleeved with a first spring, and the two ends of the first spring are respectively fixedly connected to the movable plate and the inner wall of the U-shaped plate.

[0009] Furthermore, a rectangular groove is provided on one side of the U-shaped plate away from the terminal body, and a cross plate is slidably connected to the inner cavity of the rectangular groove, grooves are provided on the left and right sides of the terminal body near the bottom, and a rectangular slide groove is provided on the inner side of the groove, the other side of the cross plate passes through the rectangular slide groove, extends to the inner cavity of the groove, and is fixedly connected to a toggle plate, the bottom of the cross plate is fixedly connected to a second spring, and the two ends of the second spring are respectively fixedly connected to the cross plate and the bottom of the inner cavity of the rectangular slide groove.

[0010] Furthermore, a limiting slide groove is provided at the bottom of the inner cavity of the U-shaped plate, and the inner cavity of the limiting slide groove is slidably connected with a slider, the top of the slider is fixedly connected to the cross plate, the inner cavity of the limiting slide groove is provided with a third spring, and the two ends of the third spring are respectively fixedly connected to the slider and the inner side wall of the limiting slide groove, a positioning groove is provided on the inner side of the groove, and the inner cavity of the positioning groove is plugged with a positioning block matching it, and the positioning block is fixedly connected to the toggle plate.

[0011] Furthermore, a buckle groove is provided on a side of the toggle plate away from the horizontal plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. Through the setting of convex bulge, crimping barbed piece, wire skin crimping piece and slotting, it can be realized by adding additional convex bulge and slotting stations before terminal crimping. Therefore, when using traditional wire terminals to crimp flexible circuit boards, there is no need to open new molds for terminals. At the same time, the structure of the terminal and plastic is fixed without any changes, and the connector plastic that matches it does not need to be changed, so there is no need to open new molds for connector plastic. Compared with piercing crimping, the investment in special equipment is greatly reduced. This new crimping method is standardized and universal, and can be applied to the connection application of all wiring harnesses and terminals of the whole vehicle. It has broad market promotion value and can be extended to all automotive wiring harnesses including new energy vehicles, with a market capacity of about 300 billion;

[0014] 2. Through the arrangement of the receiving groove, the needle, the movable shaft, the rotating gear, the rack, the movable plate, the U-shaped plate, the square rod, the first spring, the horizontal plate, the second spring, the toggle plate, the third spring, the positioning groove, the positioning block and the buckle groove, when the flexible circuit board is inserted from the bottom of the terminal, the needles on both sides can be squeezed to deflect into the receiving groove, and after the flexible circuit board is inserted, the resilience of the first spring can drive the needle to reset and insert into the surface of the flexible circuit board, thereby improving the firmness of the connection between the flexible circuit board and the terminal. In addition, by pulling the toggle plate to move to the side away from the terminal body, the positioning block can be pulled out of the positioning groove, so that when the toggle plate is pressed to slide downward, the U-shaped plate can be driven to move downward synchronously, so that the needle can be pulled out of the flexible circuit board, which is convenient for adjusting the crimping position of the flexible circuit board and has higher operational flexibility.

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of this embodiment;

[0017] Figure 2 is a three-dimensional diagram of the terminal body of this embodiment;

[0018] Figure 3 This is a schematic diagram of the connection structure between the crimping barb and the flexible circuit board of this embodiment;

[0019] Figure 4 This is a schematic diagram of the local structure of the terminal body of this embodiment;

[0020] Figure 5 for Figure 1 A magnified view of the structure at center A;

[0021] Figure 6 for Figure 4 A magnified view of the structure at B in the middle.

[0022] In the figure: 1. terminal body; 2. flexible circuit board; 3. crimping area; 31. cutting groove; 32. wire skin crimping piece; 4. crimping barb; 5. convex bump; 6. storage groove; 7. barb; 8. movable shaft; 9. rotating gear; 10. rack; 11. movable plate; 12. U-shaped plate; 13. square rod; 14. first spring; 15. horizontal plate; 16. toggle plate; 17. second spring; 18. third spring; 19. positioning groove; 20. positioning block; 21. buckle groove. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0024] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] See also Figures 1 to 6 , the utility model provides the following technical solutions:

[0027] Embodiment 1:

[0028] A terminal crimping structure includes a terminal body 1 and a flexible circuit board 2, the flexible circuit board 2 is fitted on the bottom of the terminal body 1, a crimping area 3 is provided on the terminal body 1, and the crimping area 3 includes a cutting groove 31 and a wire skin crimping piece 32, the wire skin crimping piece 32 is fitted with the flexible circuit board 2, a crimping thorn piece 4 is provided at the bottom of the terminal body 1, and two convex bumps 5 arranged up and down are fixedly connected to the terminal body 1, the crimping thorn piece 4 is inserted into the outer surface of the flexible circuit board 2, the left and right inner walls of the terminal body 1 are provided with storage grooves 6, and the left and right sides of the terminal body 1 are provided with anti-dropping mechanisms.

[0029] The anti-falling mechanism includes a needle 7, and the two ends of the needle 7 are respectively located in the inner cavity of the terminal body 1 and the receiving groove 6, one end of the needle 7 is fixedly connected to a movable shaft 8, and the rear end of the movable shaft 8 is rotatably connected to the inner wall of the receiving groove 6, the front end of the movable shaft 8 is fixedly connected to a rotating gear 9, and the bottom of the rotating gear 9 is meshed with a rack 10, the bottom of the rack 10 is fixedly connected to a movable plate 11, and the bottom of the movable plate 11 is fitted with a U-shaped plate 12, the left and right sides of the movable plate 11 are jointly provided with a square hole, and the inner cavity of the square hole is slidably connected with a square rod 13, the left and right ends of the square rod 13 are respectively fixedly connected to the left and right sides of the inner cavity of the U-shaped plate 12, the outer side of the square rod 13 is sleeved with a first spring 14, and the two ends of the first spring 14 are respectively fixedly connected to the movable plate 11 and the inner wall of the U-shaped plate 12.

[0030] Working principle: When the utility model is in use, two convex bumps 5 and two grooves 31 are added to the tail of the flexible circuit board 2 where crimping is required. By adding the convex bumps 5, the friction coefficient between the flexible circuit board 2 and the terminal body 1 is increased to achieve the purpose of increasing the pull-off force. By adding the grooves 31, the contact points between the terminal body 1 and the flexible circuit board 2 after crimping are doubled, thereby effectively increasing the stability of the contact resistance. The terminal crimping depth is controlled by a pressure sensor to ensure that the terminal body 1 presses the flexible circuit board 2 tightly but does not pierce the conductor. By debugging the terminal crimping tool, the insulation layer of the flexible circuit board 2 is pierced, the contact points between the terminal body 1 and the flexible circuit board 2 are increased, and the stability of the contact resistance is increased. At the same time, piercing the insulation is also conducive to increasing the pull-off force. In addition, when the flexible circuit board 2 is inserted at the bottom of the terminal body 1, the flexible circuit board 2 can be pulled downward to slide after the flexible circuit board 2 is inserted and extended upward for a distance, so that the needle 7 can be inserted into the insulation on the surface of the flexible circuit board 2 to further increase the pull-off force.

[0031] Embodiment 2:

[0032] A rectangular slot is provided on the side of the U-shaped plate 12 away from the terminal body 1, and a horizontal plate 15 is slidably connected to the inner cavity of the rectangular slot. A groove is provided on both sides of the terminal body 1 near the bottom, and a rectangular slide is provided on the inner side of the groove. The other side of the horizontal plate 15 passes through the rectangular slide and extends to the inner cavity of the groove, and is fixedly connected to a toggle plate 16. A buckle groove 21 is provided on the side of the toggle plate 16 away from the horizontal plate 15. A second spring 17 is fixedly connected to the bottom of the horizontal plate 15, and the two ends of the second spring 17 are respectively connected to the The cross plate 15 is fixedly connected to the bottom of the inner cavity of the rectangular slide, a limiting slide is provided at the bottom of the inner cavity of the U-shaped plate 12, and a slider is slidably connected to the inner cavity of the limiting slide, the top of the slider is fixedly connected to the cross plate 15, a third spring 18 is provided in the inner cavity of the limiting slide, and the two ends of the third spring 18 are respectively fixedly connected to the slider and the inner side wall of the limiting slide, a positioning groove 19 is provided on the inner side of the groove, and a positioning block 20 matching with it is inserted into the inner cavity of the positioning groove 19, and the positioning block 20 is fixedly connected to the toggle plate 16.

[0033] Working principle: When the utility model is in use, the positioning block 20 can be pulled out of the positioning groove 19 by pulling the toggle plate 16 to move to the side away from the terminal body 1, so that when the toggle plate 16 is pressed to slide downward, the U-shaped plate 12 can be driven to move downward synchronously through the cross plate 15, so that the needle 7 can be pulled out from the insulation of the flexible circuit board 2, which is convenient for adjusting the crimping position of the flexible circuit board 2, and the operation flexibility is higher.

[0034] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A terminal crimping structure, comprising a terminal body (1) and a flexible circuit board (2), characterized in that: The flexible circuit board (2) is arranged at the bottom of the terminal body (1), and a crimping area (3) is arranged on the terminal body (1), and the crimping area (3) includes a cutting groove (31) and a wire skin crimping piece (32), and the wire skin crimping piece (32) is arranged at the flexible circuit board (2). A crimping barb (4) is arranged at the bottom of the terminal body (1), and two convex bumps (5) arranged up and down are fixedly connected to the terminal body (1), and the crimping barb (4) is plugged into the outer surface of the flexible circuit board (2), and the left and right inner walls of the terminal body (1) are provided with storage grooves (6), and the left and right sides of the terminal body (1) are provided with anti-dropping mechanisms.

2. A terminal crimping structure according to claim 1, characterized in that: The anti-drop mechanism comprises a needle (7), and the two ends of the needle (7) are respectively located in the inner cavity of the terminal body (1) and the receiving groove (6), one end of the needle (7) is fixedly connected to a movable shaft (8), and the rear end of the movable shaft (8) is rotatably connected to the inner wall of the receiving groove (6), the front end of the movable shaft (8) is fixedly connected to a rotating gear (9), and the bottom of the rotating gear (9) is meshed with a rack (10), and the bottom of the rack (10) is fixedly connected to a movable plate (11). ), and a U-shaped plate (12) is fitted on the bottom of the movable plate (11), a square hole is provided on both the left and right sides of the movable plate (11), and a square rod (13) is slidably connected to the inner cavity of the square hole, and the left and right ends of the square rod (13) are respectively fixedly connected to the left and right sides of the inner cavity of the U-shaped plate (12), and a first spring (14) is sleeved on the outer side of the square rod (13), and the two ends of the first spring (14) are respectively fixedly connected to the inner wall of the movable plate (11) and the U-shaped plate (12).

3. A terminal crimping structure according to claim 2, characterized in that: A rectangular slot is formed on one side of the U-shaped plate (12) away from the terminal body (1), and a transverse plate (15) is slidably connected to the inner cavity of the rectangular slot; grooves are formed on both the left and right sides of the terminal body (1) near the bottom, and a rectangular slide groove is formed on the inner side of the groove; the other side of the transverse plate (15) passes through the rectangular slide groove, extends to the inner cavity of the groove, and is fixedly connected to a toggle plate (16); a second spring (17) is fixedly connected to the bottom of the transverse plate (15), and two ends of the second spring (17) are respectively fixedly connected to the transverse plate (15) and the bottom of the inner cavity of the rectangular slide groove.

4. A terminal crimping structure according to claim 3, characterized in that: A limiting slide groove is provided at the bottom of the inner cavity of the U-shaped plate (12), and a slider is slidably connected to the inner cavity of the limiting slide groove, and the top of the slider is fixedly connected to the cross plate (15). A third spring (18) is provided in the inner cavity of the limiting slide groove, and the two ends of the third spring (18) are respectively fixedly connected to the slider and the inner wall of the limiting slide groove. A positioning groove (19) is provided on the inner side of the groove, and a positioning block (20) matching with the positioning groove (19) is inserted into the inner cavity of the positioning groove (19), and the positioning block (20) is fixedly connected to the toggle plate (16).

5. A terminal crimping structure according to claim 4, characterized in that: A buckle groove (21) is formed on a side of the shifting plate (16) away from the transverse plate (15).

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