Wire end straight tip connector

Abstract

The utility model discloses a wire end straight head connector, include: casing, terminal sleeve and limit ring, casing is provided with accommodation cavity, and the inboard wall of accommodation cavity is arranged in multiple limit protruding arms in circumference, and every limit protruding arm includes embrace and hold arm section and support arm section respectively, embrace and hold arm section extends along the axial direction of accommodation cavity, and support arm section is located embrace and hold arm section one end close to the interface of accommodation cavity and is inserted, and support arm section is protruding to the inside in the radial direction to embrace and hold arm section, and, the inboard wall of accommodation cavity is arranged in multiple limit boss in circumference, and limit boss is located close to embrace and hold arm section and is away from support arm section one end and is arranged axially interval with embrace and hold arm section, terminal sleeve is inserted in accommodation cavity, and the outer circumferential side of terminal sleeve abuts against embrace and hold arm section, and one end of terminal sleeve abuts against support arm section, limit ring is sleeved on terminal sleeve and abuts against limit boss one side towards support arm section.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a straight-end connector. Background Technology

[0002] In the field of electrical connector technology, straight-end connectors are widely used due to their compact structure and ease of standardized insertion and removal.

[0003] Currently, the terminals of this type of connector are mostly fixed in the housing using a single limiting structure, such as a local baffle or locking point at the tail of the terminal mounting hole for axial restraint. Under vibration or frequent insertion / removal conditions, this method is prone to stress concentration, leading to wear or plastic deformation of the limiting structure. This can cause axial movement or even rotation of the terminal within the mounting hole, severely affecting contact reliability and connector lifespan. Furthermore, to adapt to the trend of device miniaturization, the internal terminal layout of connectors is becoming increasingly dense. Currently, terminals are mostly arranged in parallel or matrix patterns. This layout is not conducive to stress distribution within the limited housing space, and uneven spacing between adjacent terminals may cause excessive local stress on the housing during insertion and removal, further exacerbating the terminal instability problem. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a straight-end connector that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: As one aspect of this utility model, a straight-end connector is provided, comprising: The housing has a receiving cavity. Multiple limiting protrusions are circumferentially arranged on the inner wall of the receiving cavity. Each limiting protrusion includes a clamping arm segment and a supporting arm segment. The clamping arm segment extends axially along the receiving cavity, and the supporting arm segment is located at the end of the clamping arm segment near the insertion interface of the receiving cavity, and the supporting arm segment protrudes radially inward relative to the clamping arm segment. Furthermore, multiple limiting bosses are circumferentially arranged on the inner wall of the receiving cavity. The limiting bosses are located near the end of the clamping arm segment away from the supporting arm segment and are axially spaced from the clamping arm segment. Terminal sleeve, the terminal sleeve is inserted into the receiving cavity, the outer periphery of the terminal sleeve abuts against the clamping arm section, and one end of the terminal sleeve abuts against the support arm section; A limiting ring is fitted onto the terminal sleeve and abuts against the limiting boss on the side facing the support arm segment.

[0006] Preferably, the outer periphery of the limiting ring is provided with a first guide surface, which guides the limiting ring past the limiting boss during assembly.

[0007] Preferably, the limiting boss has a second guide surface on the side facing away from the limiting protrusion, and the limiting ring is guided over the limiting boss by the second guide surface during assembly.

[0008] Preferably, the limiting protrusion and the limiting boss are integrally formed within the receiving cavity of the housing.

[0009] Preferably, the limiting ring is a C-shaped ring with a radial opening.

[0010] Preferably, the outer wall of the terminal sleeve is provided with a mounting groove, and the limiting ring is engaged in the mounting groove to restrict the axial movement of the limiting ring relative to the terminal sleeve.

[0011] Preferably, at least two of the accommodating cavities are arranged diagonally across the cross-section of the housing.

[0012] Preferred options also include: A cable conductor, one end of which is connected to the terminal sleeve, and the other end of which is led out from the cable outlet of the accommodating cavity; Terminal spring, which is nested inside the terminal sleeve.

[0013] Preferably, the terminal sleeve and the cable conductor are ultrasonically welded.

[0014] Preferably, the terminal spring has a ring-shaped structure and a C-shaped cross-section.

[0015] The beneficial effects of this utility model are as follows: In this invention, the first axial limiting is formed by the contact between the support arm segment and the end of the terminal sleeve, and the second axial limiting is formed by the contact between the limiting ring and the limiting boss. This double limiting structure significantly improves the axial holding force and reliability of the terminal sleeve under vibration environment.

[0016] In this invention, the clamping arm segments of the multiple limiting protrusions apply a continuous and uniform radial constraint force to the outer wall of the terminal sleeve, effectively eliminating the assembly gap between the terminal sleeve and the inner wall of the accommodating cavity, preventing any slight wobbling or swaying of the terminal sleeve in the radial direction, and ensuring its precise alignment and stability in the accommodating cavity. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 A schematic diagram of the straight connector structure provided in this embodiment of the utility model; Figure 2for Figure 1 A schematic diagram of the exploded structure; Figure 3 for Figure 1 A top-view structural diagram; Figure 4 for Figure 3 A schematic diagram of the AA-plane cross-sectional structure.

[0019] Figure 5 for Figure 4 A cross-sectional view of the inner shell.

[0020] In the picture: 100. Straight connector with wire end; 101. Housing; 102. Receiving cavity; 103. Limiting protrusion; 131. Clamping arm section; 132. Supporting arm section; 104. Limiting boss; 105. Terminal sleeve; 151. Mounting groove; 106. Limiting ring; 107. Terminal spring. Detailed Implementation

[0021] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model are further described in detail below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Figure 1 A schematic diagram of the straight connector structure provided in this embodiment of the utility model; Figure 2 for Figure 1 A schematic diagram of the exploded structure; Figure 3 for Figure 1 A top-view structural diagram; Figure 4 for Figure 3 A schematic diagram of the AA-plane cross-sectional structure. Figure 5 for Figure 4 A cross-sectional view of the housing is shown. The height direction of the straight connector at the wire end is taken as the Z-axis, which aligns with the direction of the cable lead-out. The axial direction of the housing and the accommodating cavity mentioned in this paper are both along the Z-axis. The Z-axis is perpendicular to the plane containing the X and Y axes. The length direction of the straight connector at the wire end is taken as the X-axis, and the width direction is taken as the Y-axis. The Y-axis is perpendicular to the X-axis. The cross-section of the housing 100 mentioned in this paper represents the plane containing the X and Y axes.

[0025] like Figures 1 to 5 As shown, this embodiment provides a straight-end connector 100 including: a housing 101, a receiving cavity 102, multiple limiting protrusions 103, multiple limiting bosses 104, a terminal sleeve 105, and a limiting ring 106. The housing 101 is provided with a receiving cavity 102. Multiple limiting protrusions 103 are circumferentially arranged on the inner wall of the receiving cavity. Each limiting protrusion includes a clamping arm section 131 and a supporting arm section 132. The clamping arm section extends axially along the receiving cavity 102, and the supporting arm section is located at the end of the clamping arm section near the insertion interface of the receiving cavity, and the supporting arm section protrudes radially inward relative to the clamping arm section. The inner wall of the receiving cavity is circumferentially arranged with multiple limiting protrusions 103. The device is provided with a plurality of limiting bosses 104, which are located near the end of the clamping arm segment away from the support arm segment and are axially spaced from the clamping arm segment; the terminal sleeve 105 is inserted into the receiving cavity 102, the outer periphery of the terminal sleeve abuts against the clamping arm segment, and one end of the terminal sleeve abuts against the support arm segment; the limiting ring 106 is fitted on the terminal sleeve 105 and abuts against the side of the limiting bosses facing the support arm segment.

[0026] In this embodiment, the insertion interface of the accommodating cavity mainly serves as the interface for the straight connector 100 to mate with other connectors. (See reference...) Figure 1 As shown, the insertion interface of the receiving cavity is located at the bottom of the receiving cavity 102, while the top of the receiving cavity 102 serves as the cable outlet, through which the cable conductor is typically led out. In the straight connector 100, the cable outlet of the housing 101 is generally arranged along the axial direction of the housing 101.

[0027] In this invention, the first axial restraint is formed by the contact between the support arm segment 132 and the end of the terminal sleeve 105, while the second axial restraint is formed by the contact between the restraining ring 106 and the restraining boss 104. This dual restraint structure significantly improves the axial holding force and reliability of the terminal sleeve 105 under vibration. Specifically, the contact between the end of the terminal sleeve 105 and the first end of the restraining protrusion 103 forms the first axial restraint, establishing a reliable benchmark for subsequent fixing processes. The restraining boss 104 and the restraining ring 106 fitted on the terminal sleeve 105 cooperate to form the second axial restraint, resisting pulling forces, vibrations, and impacts from the cable direction. Even in the event of accidental failure of the first axial restraint, this second axial restraint serves as a safety barrier, ensuring that the terminal sleeve 105 will not break or detach from the housing 101, greatly improving the mechanical reliability of this straight-end connector under harsh operating conditions.

[0028] In this embodiment, the clamping arm segment 131 extends axially from the end of the receiving cavity 102 into the receiving cavity 102, providing radial constraint and guidance during the insertion of the terminal sleeve 105, effectively preventing deflection and ensuring concentricity with the receiving cavity. The clamping arm segment 131 clamps the outer wall of the terminal sleeve 105. The clamping arm segments 131 of the plurality of limiting protrusions 103 apply a continuous and uniform radial constraint force to the outer wall of the terminal sleeve 105, effectively eliminating the assembly gap between the terminal sleeve 105 and the inner wall of the receiving cavity 102, preventing any slight radial wobbling or swaying of the terminal sleeve 105, and ensuring its precise alignment and stability in the receiving cavity 102. Furthermore, the clamping arm segment 131 has a certain degree of elasticity, which can absorb some assembly stress and working vibration, avoiding hard scratches on the terminal sleeve 105, while providing continuous clamping force to prevent radial movement.

[0029] In this embodiment, the end of the support arm segment 132 connected to the clamping arm segment 131 effectively disperses the axial force transmitted from the clamping arm segment to a wider area of ​​the inner wall of the accommodating cavity 102 through its radially extending structure. The contact between the support arm segment and the end of the terminal sleeve constitutes the first axial limiting. Here, the position where the support arm segment and the end of the terminal sleeve abut against each other can adopt a wing-shaped structure to significantly increase the contact area with the end of the terminal sleeve 105, avoid stress concentration that may be caused by point or line contact, make the supporting force evenly distributed, significantly improve the stability of axial support, and prevent the terminal sleeve 105 from tilting or squirming when subjected to force.

[0030] In one embodiment, a first guide surface is provided on the outer periphery of the limiting ring 106. During assembly, the limiting ring 106 is guided past the limiting boss 104 via the first guide surface. Specifically, the outer diameter of the limiting ring 106 on the side closer to the limiting protrusion 103 is smaller than the outer diameter of the limiting ring 106 on the side farther from the limiting protrusion 103. In this case, the first guide surface is an inclined surface. When the terminal sleeve 105 with the limiting ring 106 installed is pressed into the receiving cavity 102, the first guide surface of the limiting ring 106 can easily contact the limiting boss 104, guiding the limiting ring 106 to slide in smoothly and be aligned. The limiting ring 106 extends beyond the limiting boss 104 on the side closer to the limiting protrusion 103 and abuts against the limiting boss 104 on the side away from the limiting protrusion 103, effectively avoiding jamming or assembly damage that may occur when the terminal sleeve 105 is installed into the housing 101, and greatly improving assembly efficiency and yield.

[0031] In one embodiment, the limiting boss 104 has a second guide surface on the side facing away from the limiting protrusion 103. During assembly, the limiting ring 106 is guided past the limiting boss 104 via the second guide surface. Specifically, when the terminal sleeve 105 with the limiting ring 106 installed is pressed into the receiving cavity 102, the limiting ring 106 can be guided to slide in and center more smoothly by contacting the second guide surface of the limiting boss 104.

[0032] In one embodiment, the limiting arm 103 and the limiting boss 104 are integrally formed within the receiving cavity 102 of the housing. This arrangement enhances the mechanical strength, rigidity, impact resistance, and deformation resistance of the limiting arm 103 and the limiting boss 104, ensuring the long-term stability of the limiting function. Simultaneously, it completely avoids the cumulative errors caused by separate processing and assembly, ensuring that each terminal sleeve 105 in the straight connector 100 achieves completely consistent and precise positioning, thereby guaranteeing performance uniformity and reliability.

[0033] In one embodiment, the limiting ring 106 is an open C-shaped sleeve. Due to the inherent open design of the C-shaped sleeve, it possesses a certain degree of elasticity, allowing it to be opened and fitted onto the designated installation position on the terminal sleeve 105. Assembly requires no special tools, making the process simple and quick. It also facilitates disassembly and replacement during maintenance, significantly improving production efficiency and maintainability. Simultaneously, after installation, the C-shaped sleeve generates a continuous, inward elastic restoring force. This force securely fixes the C-shaped sleeve within the mounting groove 151 of the terminal sleeve 105, preventing axial movement or circumferential rotation under operational vibration. This ensures the stability of its relative position to the limiting boss 104, thereby maintaining the long-term effectiveness of the limiting function.

[0034] In one embodiment, the outer wall of the terminal sleeve 105 is provided with a mounting groove 151. The limiting ring 106 is fitted onto the terminal sleeve 105 and engaged in the mounting groove 151, thereby restricting the axial movement of the limiting ring relative to the terminal sleeve. The mounting groove 151 provides a preset and unique engaging position for the limiting ring 106, ensuring that the axial position of the limiting ring 106 on the terminal sleeve 105 remains unchanged. This ensures that its contact with the limiting boss 104 in the receiving cavity 102 is always in the optimal state, guaranteeing the accuracy and consistency of the second limiting function.

[0035] In one embodiment, at least two receiving cavities are provided on the housing 101, and the at least two receiving cavities are arranged diagonally across the cross-section of the housing 101. This adjustment of the arrangement of the receiving cavities within the housing saves installation space and achieves connector miniaturization.

[0036] In one embodiment, the straight connector 100 further includes a cable conductor and a terminal spring 107. One end of the cable conductor is connected to the terminal sleeve 105, and the other end of the cable conductor is led out from the cable outlet of the receiving cavity; the terminal spring 107 is nested inside the terminal sleeve 105.

[0037] In this embodiment, the terminal sleeve 105 and the cable conductor are ultrasonically welded. Optionally, the cable conductor can be a thick conductor of 6AWG or above, or a multi-strand fine stranded wire. In this case, if traditional crimping is still used, the process is not only difficult but also prone to damaging the wire core. Ultrasonic welding can firmly fuse the cable conductor and the terminal sleeve into a solid whole, avoiding problems such as wire core breakage, deformation, or insufficient contact that may occur with crimping, thus ensuring the connection quality of large-section cable conductors.

[0038] In this embodiment, the terminal spring 107 has a ring-shaped structure with a C-shaped cross-section. The ring-shaped structure of the terminal spring 107 surrounds the terminal sleeve 105, forming a large contact area. Compared to point contact or sheet contact, this significantly reduces contact resistance, increases current carrying capacity, and ensures continuous and stable current transmission under vibration. Simultaneously, when the terminal sleeve 105 is inserted, the C-shaped structure of the terminal spring 107 elastically deforms and opens, generating a continuous and uniform radial contact pressure. This ensures low contact resistance and mechanical clamping force, compensates for minor wear and manufacturing tolerances on the contact surface, and ensures a long-lasting and tight electrical connection.

[0039] In this embodiment, the straight connector 100 requires the following assembly steps: First, the terminal sleeve 105 is ultrasonically welded to the cable conductor. Then, the terminal spring 107 is nested inside the terminal sleeve 105 with the welded cable conductor, and the limiting ring 106 is fitted onto the terminal sleeve 105. Finally, the assembly is installed into the receiving cavity 102 of the housing 101, so that the ends of the limiting ring 106 and the terminal sleeve 105 abut against the limiting boss 104 and the limiting arm 103, respectively. It should be noted that although the cable conductor is not shown in the figure, the terminal spring 107 should be installed within the terminal sleeve 105 with the welded cable conductor.

[0040] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A straight-end connector (100), characterized in that, include: The housing (101) is provided with a receiving cavity (102). A plurality of limiting protrusions (103) are arranged circumferentially on the inner sidewall of the receiving cavity. Each limiting protrusion includes a clamping arm segment (131) and a supporting arm segment (132). The clamping arm segment (131) extends axially along the receiving cavity (102). The supporting arm segment (132) is located at one end of the clamping arm segment (131) near the insertion interface of the receiving cavity (102), and the supporting arm segment (132) protrudes radially inward relative to the clamping arm segment (131). A plurality of limiting bosses (104) are arranged circumferentially on the inner sidewall of the receiving cavity. The limiting bosses (104) are located at one end near the clamping arm segment (131) away from the supporting arm segment (132) and are axially spaced from the clamping arm segment (131). Terminal sleeve (105) is inserted into the receiving cavity (102), the outer periphery of the terminal sleeve abuts against the clamping arm section (131), and one end of the terminal sleeve abuts against the support arm section (132). A limiting ring (106) is fitted onto the terminal sleeve (105) and abuts against the limiting boss (104) on the side facing the support arm segment (132).

2. The straight connector (100) according to claim 1, characterized in that, The outer periphery of the limiting ring (106) is provided with a first guide surface, which guides the limiting ring (106) to pass over the limiting boss (104) during assembly.

3. The straight connector (100) according to claim 1, characterized in that, The limiting boss (104) has a second guide surface on the side opposite to the limiting protrusion arm. During assembly, the limiting ring (106) is guided to pass over the limiting boss (104) through the second guide surface.

4. The straight connector (100) according to claim 1, characterized in that, The limiting protrusion (103) and the limiting protrusion (104) are integrally formed in the receiving cavity (102) of the housing (101).

5. The straight connector (100) according to claim 1, characterized in that, The limiting ring (106) is a C-shaped ring with a radial opening.

6. The straight connector (100) according to claim 1, characterized in that, The outer wall of the terminal sleeve (105) is provided with a mounting groove (151) in the circumferential direction. The limiting ring (106) is fitted into the mounting groove (151) and the axial movement of the limiting ring (106) relative to the terminal sleeve is restricted by the mounting groove (151).

7. The straight connector (100) according to claim 1, characterized in that, At least two of the accommodating cavities (102) are arranged diagonally across the cross-section of the housing (101).

8. The straight connector (100) according to any one of claims 1 to 7, characterized in that, Also includes: The cable conductor has one end connected to the terminal sleeve (105) and the other end led out from the cable outlet of the accommodating cavity; Terminal spring (107) is nested inside the terminal sleeve (105).

9. The straight connector (100) according to claim 8, characterized in that, The terminal sleeve (105) is ultrasonically welded to the cable conductor.

10. The straight connector (100) according to claim 8, characterized in that, The terminal spring (107) has a ring-shaped structure and a C-shaped cross-section.

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