Novel reversely-stacked double-elastic-arm terminal

Abstract

The utility model provides a novel reversely-stacked double-elastic-arm terminal, which comprises a terminal side wall, a second elastic arm arranged on one side of the terminal side wall, a fixed arm arranged on the other side of the terminal side wall, and a first elastic arm arranged at the outer end of the second elastic arm. A second elastic arm bending part which is bent inwards is arranged at one end, close to the first elastic arm, of the second elastic arm; a first elastic arm contact bent inwards is arranged at the end, close to the second elastic arm, of the first elastic arm, the contact of the first elastic arm is located on the inner side of the bent part of the second elastic arm, the contact of the first elastic arm and the bent part of the second elastic arm are partially overlapped, and the outer side part of the first elastic arm is folded outwards to form a turnover part; a hollow groove is formed in the terminal shell on the outer side of the fixed arm; and a first locking part which is bent outwards is arranged on the outer side of the hollow groove. By means of the mode, the problems that the positive force of an existing terminal elastic piece is not stable, and an elastic arm is prone to falling in the inserting and pulling process are solved.

Description

Technical Field

[0001] The utility model relates to the field of electronic connectors, in particular to a novel reverse-stacked double-elastic-arm terminal. Background Art

[0002] With the rapid development and widespread adoption of the automotive industry in China, demands for increasingly advanced automotive functionality are rising, posing significant challenges to automotive manufacturing technology and cost considerations. Terminals, as essential components and core components of automotive wiring harnesses, are garnering increasing attention and attention. The miniaturization of automotive signal terminals has become an inevitable trend. Miniaturized terminals exhibit lower insertion and removal forces, and the linear relationship between insertion and removal force and the terminal's positive force indicates that smaller terminals also exhibit lower positive force.

[0003] Traditional miniaturized terminals have the following shortcomings:

[0004] 1. Traditional miniaturized terminals only have a single spring to provide positive force, which is increasingly unable to meet the vibration performance requirements of automotive products. Terminals with low positive force are prone to instantaneous signal interruption during vibration, resulting in loss of automotive line signals.

[0005] 2. Traditional miniaturized terminals have terminals with dual spring arms, most of which are stacked on the same side. This optimizes the positive force provided by a single spring arm. However, the positive force provided by the dual spring arms on the same side is unstable and the spring arms are easily surrendered during the insertion and removal process, resulting in a reduction in the positive force. Utility Model Content

[0006] In order to solve the above problems, the present invention proposes a novel reverse-stacked double-elastic-arm terminal, which solves the problem that the positive force of the existing terminal spring is unstable and the elastic arms are easily surrendered during the plugging and unplugging process.

[0007] The main contents of the utility model include: a novel reverse stacked double-elastic arm terminal, comprising: a terminal side wall, a second elastic arm arranged on one side of the terminal side wall, a fixed arm arranged on the other side of the terminal side wall, and a first elastic arm arranged at the outer end of the second elastic arm;

[0008] The second elastic arm is provided with a second elastic arm bent portion bent inwardly at one end close to the first elastic arm;

[0009] The first elastic arm is provided with a first elastic arm contact point bent inwardly at one end close to the second elastic arm. The contact point of the first elastic arm is located inside the bent portion of the second elastic arm, and the two partially overlap. The outer portion of the first elastic arm is folded outwardly to form a flip portion.

[0010] A hollow groove is provided at the terminal housing outside the fixed arm, and a first locking portion bent outward is provided on the outside of the hollow groove. One end of the first locking portion is connected to the terminal housing, and the other end is bent outward and suspended.

[0011] Preferably, an inwardly protruding fixed arm contact is provided at a position of the fixed arm corresponding to the first elastic arm contact.

[0012] Preferably, an inclined transition portion is provided between the fixed arm contact and the fixed arm.

[0013] Preferably, a small guiding bump is provided on one end of the outer side of the fixed arm contact close to the socket, and the height of the small guiding bump is smaller than that of the fixed arm contact.

[0014] Preferably, a square convex bump protruding inward is symmetrically provided on one end of the terminal side wall close to the socket.

[0015] Preferably, an outwardly protruding anti-mistake bump is symmetrically provided at one end of the terminal side wall close to the socket.

[0016] Preferably, an inwardly bent undercut is provided on the frame opening of the terminal housing.

[0017] The beneficial effects of the present invention are:

[0018] The utility model adopts a reverse-stacked double elastic arm structure to provide a more stable positive force, and the first elastic arm has an outward-flipped flip portion, which makes the elastic arm more rigid, the contact shape is stable, and not easy to deform; the end of the second elastic arm can form a simply supported beam structure with the plastic sheath arm, which increases rigidity, so that the terminal positive force can be adjusted according to actual conditions, obtaining a more stable positive force and more reliable contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic cross-sectional perspective structural diagram of a preferred embodiment of a novel reverse-stacked double-elastic-arm terminal of the present invention;

[0020] Figure 2 It is a sectional front view of a novel reverse stacked double spring arm terminal;

[0021] Figure 3 This is a front view of a new type of reverse stacked double spring arm terminal;

[0022] Figure 4 for Figure 3 Right view of;

[0023] Figure 5 This is a schematic diagram of plugging and unplugging male and female terminals;

[0024] Reference numerals:

[0025] 1-first elastic arm, 2-second elastic arm, 3-fixed arm, 4-terminal side wall, 50-male terminal, 60-plastic sheath;

[0026] 11- flip part, 12- first elastic arm contact;

[0027] 21- second elastic arm bending portion;

[0028] 31-fixed arm contact, 32-transition portion, 33-hollow groove, 34-first locking portion, 35-second locking portion, 36-guide small convex bump, 37-undercut;

[0029] 41-Square convex hull. DETAILED DESCRIPTION

[0030] The technical solution protected by the present utility model is described in detail below with reference to the accompanying drawings.

[0031] like Figure 1 、 Figure 2 As shown, a novel reverse stacked double elastic arm terminal comprises: a terminal side wall 4, a second elastic arm 2 provided on one side of the terminal side wall 4, a fixed arm 3 provided on the other side of the terminal side wall 4, and a first elastic arm 1 provided at the outer end of the second elastic arm 2;

[0032] The second elastic arm 2 is provided with an inwardly bent second elastic arm bent portion 21 at one end close to the first elastic arm 1 . Initially, the second elastic arm bent portion 21 is bent toward the first elastic arm 1 but does not contact the first elastic arm 1 .

[0033] The first elastic arm 1 is provided with a first elastic arm contact 12 bent inwardly at one end close to the second elastic arm 2. The first elastic arm contact 12 is located inside the second elastic arm bent portion 21, and the two partially overlap. When the male terminal is inserted into the female terminal and contacts the first elastic arm contact 12, the free end of the first elastic arm contact 12 is pushed outward by the force, and at the same time drives the second elastic arm bent portion 21 to move outward. When the displacement reaches a certain distance, the second elastic arm bent portion 21 contacts the outer plastic sheath 60 (such as Figure 5 As shown), at this time, the second elastic arm bent portion 21 provides a reverse force to the first elastic arm contact 12, forming a simply supported beam structure. The plastic sheath 60 provides a reaction force to the second elastic arm 2, thereby increasing the reverse positive pressure of the first elastic arm 1, thereby increasing the positive force of the terminal; the second elastic arm 2 formed by reverse stacking is less likely to surrender after deformation than the second elastic arm 2 formed by stacking on the same side, and is more stable.

[0034] The outer portion of the first elastic arm 1 is folded outward 180 degrees to form a flip portion 11. The flipped first elastic arm 1 structure not only increases the strength of the first elastic arm 1, but also shortens the length of the first elastic arm 1, which can correspondingly reduce the overall length of the mating plastic sheath 60, thereby reducing the overall length of the connector and achieving a more compact connector.

[0035] Furthermore, a hollowed-out slot 33 is provided in the terminal housing outside the fixed arm, forming a micro-elastic arm. When the male and female contacts make contact, the micro-elastic arm deforms to a certain extent. This is different from the fixed arm 3, which cannot deform during the male-female mating process due to poor terminal positioning or excessive interference, resulting in hard interference and forced scraping, causing excessive wear on the convex bump of the fixed arm contact 31. The micro-elastic arm can avoid this defect to a certain extent. When the male terminal is inserted, the convex bump can deform slightly with the micro-elastic arm, preventing excessive wear and tear on the convex bump and causing poor contact later.

[0036] A first locking portion 34 bent outward is provided on the outer side of the hollow groove 33. One end of the first locking portion 34 is connected to the terminal housing, and the other end is bent outward in an "L" shape and suspended in the air. The "L"-shaped structure is more stable and not easy to deform. This first locking portion 34 passes through the plastic sheath and forms a stop with the plastic retaining wall. At this time, the "L"-shaped structure has a large interference area and is not sharp, and is not easy to cause damage to the plastic during pulling, thereby increasing the one-time locking holding force of the terminal.

[0037] The functions of the first locking portion 34 and the second locking portion 35 are as follows: when the terminal is inserted into the hole of the plastic sheath, the "L"-shaped structure of the first locking portion 34 is first pressed down and then rebounds to clamp the stop plate of the plastic sheath, thereby achieving the function of locking the terminal once; then the plastic sheath continues to be inserted, clamping the second locking portion 35 of the terminal, and the secondary stopping mechanism prevents the terminal from being pulled out.

[0038] like Figure 1 、 Figure 2 As shown, an inwardly protruding fixed arm contact 31 is provided at the position corresponding to the first elastic arm contact 12 of the fixed arm 3, and an inclined transition portion 32 is provided between the fixed arm contact 31 and the fixed arm 3. The design of the transition portion 32 avoids the risk of cracking of the first elastic arm contact 12 due to excessive protrusion height during the stamping process, which could lead to poor contact.

[0039] like Figure 2As shown, a small guide bump 36 is provided on the outer side of the fixed arm contact 31, near the end of the connector. The height of the guide bump 36 is smaller than that of the fixed arm contact 31. The guide bump 36 and the front area of ​​the first elastic arm 1 serve as a guide, preventing the tip of the male terminal from scraping against the normal contact point during oblique insertion, thereby causing wear of the plating of the bump on the fixed arm contact 31 and avoiding the risk of poor contact caused by prolonged exposure of the substrate.

[0040] like Figure 2 、 Figure 3 As shown, the terminal sidewall, near the socket, is symmetrically provided with an inwardly projecting square bump 41. This design reinforces the shape of the terminal opening, preventing deformation. Furthermore, the structure formed by this bump 41 restricts the position of the first elastic arm 1 within the opening. This also keeps the first elastic arm's flip portion 11, which is bent 180° within the opening, centered, preventing it from swinging sideways.

[0041] like Figure 1 、 Figure 4 As shown, an inwardly bent undercut 37 is provided at the frame opening of the terminal housing, so that the terminal has a polarity-proof feature and cannot be inserted into the plastic hole when turned 180°, thus meeting the polarity requirements of the automotive connector terminal.

[0042] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A new type of reverse stacked double spring arm terminal, characterized in that: include: A terminal side wall, a second elastic arm provided on one side of the terminal side wall, a fixed arm provided on the other side of the terminal side wall, and a first elastic arm provided at the outer end of the second elastic arm; The second elastic arm is provided with a second elastic arm bent portion bent inwardly at one end close to the first elastic arm; The first elastic arm is provided with a first elastic arm contact point bent inwardly at one end close to the second elastic arm. The contact point of the first elastic arm is located inside the bent portion of the second elastic arm, and the two partially overlap. The outer portion of the first elastic arm is folded outwardly to form a flip portion. A hollow groove is provided at the terminal housing outside the fixed arm, and a first locking portion bent outward is provided on the outside of the hollow groove. One end of the first locking portion is connected to the terminal housing, and the other end is bent outward and suspended.

2. A novel reverse stacked double spring arm terminal according to claim 1, characterized in that: The fixed arm is provided with an inwardly protruding fixed arm contact at a position corresponding to the first elastic arm contact.

3. A novel reverse stacked double spring arm terminal according to claim 2, characterized in that: An inclined transition portion is provided between the fixed arm contact and the fixed arm.

4. The novel reverse stacked double spring arm terminal according to claim 1, characterized in that: A small guiding bulge is provided on one end of the outer side of the fixed arm contact close to the socket, and the height of the small guiding bulge is smaller than that of the fixed arm contact.

5. The novel reverse stacked double spring arm terminal according to claim 1, characterized in that: A square convex bump protruding inward is symmetrically arranged on one end of the terminal side wall close to the socket.

6. The novel reverse stacked double spring arm terminal according to claim 1, characterized in that: The terminal side wall is symmetrically provided with an outwardly protruding anti-mistake convex bump at one end close to the socket.

7. The novel reverse stacked double spring arm terminal according to claim 1, characterized in that: An inwardly bent undercut is provided on the frame opening of the terminal housing.

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