Cylindrical connector with strong plug-in retention

Abstract

The utility model discloses a cylindrical connector with strong plug-in retention. The cylindrical connector comprises a male head and a female head, the male head comprises a first shell and a first plastic terminal assembly, and the female head comprises a second shell and a second plastic terminal assembly; the first shell and the second shell are both of a cylinder structure. One end of the first shell extends into the second shell, and the outer diameter of the extending section is reduced to form an insertion section; an annular groove is formed in an inner hole section, corresponding to the insertion section, of the second shell, a spring ring is arranged in the annular groove, a guide-in part and a clamping part are sequentially formed on the insertion section from outside to inside in the axial direction, the guide-in part is of an annular protruding structure, and the outer contour of the cross section of the guide-in part is a curve; the curve comprises a first curve section close to the clamping part and a second curve section away from the clamping part, and the radian fillet of the second curve section is larger than that of the first curve section. According to the utility model, a relatively strong plug-in holding force can be maintained, and a user can conveniently and easily realize plug-in of the male head and the female head.

Description

[Technical field]

[0001] The utility model belongs to the technical field of connectors, in particular to a cylindrical connector with strong insertion retention force. [Background technology]

[0002] The connector is an indispensable electrical component for realizing the connection of electrical signals. It generally includes a male head and a female head. The male head and the female head are plugged together, and the electrical signal connection is realized through the contact of metal terminals. In order to ensure the connection stability after plugging together, it is generally required that the male head and the female head have a certain plug-in retention force after plugging together. In a circular connector, in order to realize the plug-in retention force, it is usually necessary to add a through-hole feature on the outer surface of the product to adapt to the elastic part to provide the plug-in retention force. For example, a connector terminal disclosed in the patent publication number CN216312120U in the prior art relies on a retaining ring to make the connection between the terminal body and the terminal post more stable and reliable. However, for miniaturized cylindrical connectors, due to the small product space, this type of design has high requirements for the elastic retaining ring. The elastic retaining ring is very easy to yield during use, which shortens the product life; secondly, this design requires opening a hole on the outer surface of the product to cooperate with the elastic part, which affects the appearance.

[0003] Therefore, it is necessary to provide a new cylindrical connector with strong insertion retention force to solve the above technical problems. [Contents of the utility model]

[0004] The main purpose of the utility model is to provide a cylindrical connector with strong plug-in retention force, which can maintain a strong plug-in retention force and facilitate users to easily plug a male head and a female head.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a cylindrical connector with strong plug-in holding force, which includes a male head and a female head; the male head includes a first shell and a first plastic terminal assembly arranged in the first shell, and the female head includes a second shell and a second plastic terminal assembly arranged in the second shell; the first shell and the second shell are both cylindrical structures; one end of the first shell extends into the second shell and the outer diameter of the extending section is reduced to form a plug-in section; the second shell is provided with an annular groove in the inner hole section corresponding to the plug-in section, a spring ring is provided in the annular groove, and the plug-in section is axially formed with an introduction part and a clamping part in sequence from the outside to the inside, the introduction part is an annular protrusion structure and the outer contour of the cross section is a curve; the curve includes a first section of the curve close to the clamping part and a second section of the curve away from the clamping part, and the arc fillet of the second section of the curve is greater than the arc fillet of the first section of the curve.

[0006] Furthermore, the plug-in section has a first stop surface for axial stop formed at the beginning of the outer diameter reduction due to the diameter change, and the plug-in section is inserted into the second shell, and the axial end surface of the second shell abuts against the first stop surface.

[0007] Furthermore, the outer peripheral surface of the plug-in section is provided with an outwardly protruding positioning lug, and the inner wall surface of the second shell is provided with a positioning groove adapted to be positioned with the positioning lug.

[0008] Furthermore, a second stop surface for axially positioning the first plastic terminal assembly is provided in the inner hole of the first shell.

[0009] Furthermore, a third stop surface for axially positioning the second plastic terminal assembly is provided in the inner hole of the second shell.

[0010] Furthermore, the inner ring profile of the spring ring protrudes from the annular groove and extends into the inner hole space of the second shell.

[0011] Furthermore, the clamping portion is an annular groove structure; a fourth stop surface for axially stopping the spring coil is formed on a side of the clamping portion away from the introduction portion.

[0012] Compared with the prior art, the utility model has the beneficial effects of a cylindrical connector with strong insertion retention force: the retention force after the male head and the female head are inserted is provided by setting the spring coil, an introduction part and a clamping part are provided at the end of the male head, the male head is introduced into the spring coil by the introduction part, and the male head and the spring coil are stopped and positioned by the clamping part; two guide curves with different curvatures are designed on the external contour curve of the introduction part, when the male head is inserted, the spring coil cooperates with the second curve to introduce, and the second curve adopts a gentle large-arc rounded corner curve, which reduces the resistance when the male head is inserted; in the removal direction, the spring coil cooperates with the first curve to lead out, and the first curve adopts a steeper small-arc rounded corner curve, which increases the resistance when the male head is pulled out, and while the spring coil is inserted and retained, the insertion retention force of the male head and the female head is further improved.

Brief Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0015] Figure 3 It is a schematic cross-sectional view of the male connector and the female connector when they are plugged into each other in the embodiment of the utility model;

[0016] Figure 4 It is a partial structural schematic diagram of the male head in the embodiment of the utility model;

[0017] Figure 5 It is a partial structural schematic diagram of the female head in the embodiment of the utility model;

[0018] Figure 6 It is a schematic cross-sectional view of the first housing and the second housing when they are plugged into each other in the embodiment of the utility model;

[0019] Figure 7 It is a schematic diagram of the matching structure of the first housing and the second housing with the spring ring when they are plugged into each other in the embodiment of the utility model;

[0020] Figure 8 It is an enlarged structural diagram of the clamping part and the introduction part in the embodiment of the utility model;

[0021] The numbers in the figure represent:

[0022] 100-cylindrical connector with strong plug-in retention force;

[0023] 1-male connector, 11-first housing, 111-connection section, 112-first stop surface, 113-positioning protrusion, 114-second stop surface, 115-introduction portion, 1151-first curve, 1152-second curve, 116-clamping portion, 117-fourth stop surface, 12-first plastic part, 13-jack terminal;

[0024] 2-driving pulley assembly, 21-second housing, 211-positioning groove, 212-third stop surface, 213-annular groove, 22-second housing, 23-pin terminal, 24-spring ring. [Specific implementation method]

[0025] Embodiment 1:

[0026] Please refer to Figure 1-Figure 8 This embodiment is a cylindrical connector 100 with strong insertion retention force, which includes a male connector 1 and a female connector 2.

[0027] The male connector 1 includes a first housing 11 , a first plastic component 12 installed in the first housing 11 , and a pair of socket terminals 13 plugged and assembled in the first plastic component 12 .

[0028] The female connector 2 includes a second housing 21 , a second plastic component 22 installed in the second housing 21 , and a pair of pin terminals 23 embedded in or plug-in-assembled on the second plastic component 22 .

[0029] The first shell 11 and the second shell 21 are both cylindrical structures and have opposite outer ends and inner ends. One end of the first shell 11 and the second shell 21 that are inserted into each other is called the "outer end" and the other opposite end is called the "inner end". The outer diameter of the set length section of the first shell 11 close to the outer end is reduced to form a plug-in section 111 so that it can be inserted into the second shell 21. A first stop surface 112 for axial stop is formed on one side of the plug-in section 111 close to the inner end. When the plug-in section 111 is inserted into the second shell 21, the axial end face of the outer end of the second shell 21 abuts against the first stop surface 112 to form an axial stop during insertion; and when the first shell 11 and the second shell 21 are inserted into place, the outer peripheral contours of the two form a columnar structure of equal diameter to improve their aesthetics. There are no openings on the outer peripheral surfaces of the first shell 11 and the second shell 21, and the dustproof function is good.

[0030] In order to ensure that the jack terminal 13 can be accurately inserted into the pin terminal 23 and prevent the male connector 1 from damaging the pin terminal 23 or the jack terminal 13 due to the wrong angle, the outer peripheral surface of the plug section 111 is provided with an outwardly protruding positioning lug 113, and the inner wall surface of the second housing 21 is provided with a positioning groove 211 adapted to the positioning lug 113. The male connector 1 is positioned at an angle during insertion by the cooperation of the positioning lug 113 and the positioning groove 211. Two positioning lugs 113 are provided, and they are asymmetrically arranged so that the two pairs of jack terminals 13 can be plugged into the corresponding pin terminals 23 according to the corresponding relationship to prevent the positive and negative signals from being plugged in reverse.

[0031] The inner hole of the first housing 11 is provided with a second stop surface 114 for axially positioning the first plastic part 12. The inner hole of the second housing 21 is provided with a third stop surface 212 for axially positioning the second plastic part 22.

[0032] An annular groove 213 is provided in the inner hole section of the second housing 21 corresponding to the plug-in section 111, and a spring ring 24 is provided in the annular groove 213. The inner ring contour of the spring ring 24 protrudes from the annular groove 213 and extends into the inner hole space of the second housing 21. An introduction portion 115 and a clamping portion 116 are formed axially in sequence at the outer end of the plug-in section 111. The introduction portion 115 is an annular protrusion structure and the outer contour of the cross section is a curve, and the clamping portion 116 is an annular groove structure. The introduction portion 115 is used to guide the spring ring 24 through when the first housing 11 is inserted into the second housing 21, and the spring ring 24 stays in the clamping portion 116 when the insertion stops. A fourth stop surface 117 for axially stopping the spring ring 24 is formed on one side of the clamping portion 116 close to the inner end.

[0033] In order to reduce the insertion force when the first shell 11 and the second shell 21 are plugged together, and to improve the ease with which the operator can perform the plug-in action, and at the same time, to increase the pull-out force when the first shell 11 is pulled out, and to improve the plug-in retention force after the first shell 11 and the second shell 21 are plugged together, in this embodiment, the outer contour curve of the cross-section of the introduction portion 115 includes a first curve 1151 close to the clamping portion 116 and a second curve 1152 away from the clamping portion 116, and the arc radius of the second curve 1152 is greater than the arc radius of the first curve 1151. In this embodiment, the first section of the curve 1151 is designed as a small-arc rounded curve, that is, the first section of the curve 1151 is steeper, so that during the removal of the male plug 1, on the one hand, the spring coil 24 will not be damaged, and on the other hand, the removal force can be effectively increased to improve the insertion retention force; by designing the second section of the curve 1152 as a large-arc rounded curve, that is, the second section of the curve 1152 is relatively flat, so that during the insertion of the male plug 1, the resistance with the spring coil 24 is reduced, making it easier to insert the male plug 1.

[0034] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A cylindrical connector with strong insertion retention force, comprising a male connector and a female connector; the male connector comprises a first housing and a first plastic terminal assembly disposed in the first housing, and the female connector comprises a second housing and a second plastic terminal assembly disposed in the second housing; characterized in that: Both the first shell and the second shell are cylindrical structures; one end of the first shell extends into the second shell and the outer diameter of the extended section is reduced to form an insertion section; the second shell is provided with an annular groove in the inner hole section corresponding to the insertion section, a spring ring is provided in the annular groove, and the insertion section is axially formed with an introduction part and a clamping part from the outside to the inside, the introduction part is an annular protrusion structure and the outer contour of the cross section is a curve; the curve includes a first section of the curve close to the clamping part and a second section of the curve away from the clamping part, and the arc radius of the second section of the curve is greater than the arc radius of the first section of the curve.

2. The cylindrical connector with strong insertion retention force as claimed in claim 1, characterized in that: The plug-in section has a first stop surface for axial stop formed at the beginning of the outer diameter reduction due to the diameter change. The plug-in section is inserted into the second shell, and the axial end surface of the second shell abuts against the first stop surface.

3. The cylindrical connector with strong insertion retention force as claimed in claim 1, characterized in that: An outwardly protruding positioning lug is disposed on the outer peripheral surface of the plug-in section, and a positioning groove adapted to be positioned with the positioning lug is disposed on the inner wall surface of the second shell.

4. The cylindrical connector with strong insertion retention force as claimed in claim 1, characterized in that: A second stop surface for axially positioning the first plastic terminal assembly is disposed in the inner hole of the first housing.

5. The cylindrical connector with strong insertion retention force as claimed in claim 1, characterized in that: A third stop surface for axially positioning the second plastic terminal assembly is provided in the inner hole of the second shell.

6. The cylindrical connector with strong insertion retention force as claimed in claim 1, characterized in that: The inner ring profile of the spring ring protrudes from the annular groove and extends into the inner hole space of the second housing.

7. The cylindrical connector with strong insertion retention force as claimed in claim 1, characterized in that: The clamping portion is an annular groove structure; a fourth stop surface for axially stopping the spring ring is formed on a side of the clamping portion away from the introduction portion.

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