Welding-free socket connector

Abstract

A welding-free socket connector comprises a shell and a terminal module, the terminal module is composed of two module units, each module unit comprises a signal pin insulator and a row of signal pins installed on the signal pin insulator, and a cam capable of extruding the signal pins to enable the signal pins to be bent and deformed is arranged between the two rows of signal pins of the two module units; an inner wall of an installation cavity used for installing the terminal module on the housing is provided with an anti-drop through groove, and the anti-drop through groove is a through groove with two through ends. A signal pin insulator of the terminal module is provided with an anti-drop rib which is in interference fit with the anti-drop through groove; the shell large end of the installation cavity of the shell is located on the side away from the connector plugging end, and the shell small end of the installation cavity of the shell is located on the side facing the connector plugging end. According to the utility model, the demoulding direction of the shell is changed, so that the rotation of the signal pin insulator is reduced or avoided, and the signal pin contact is prevented from being exposed.

Description

Technical Field

[0001] The utility model belongs to the field of zero insertion force connectors, and in particular relates to a solder-free socket connector. Background Art

[0002] In the field of medical ultrasound diagnosis, multi-core zero-plug-in force connectors are involved. Zero-plug-in force connectors have the advantages of long life, easy operation, and a large number of cores. They are widely used in medical ultrasound diagnostic equipment. The socket connector used on the host end is a camshaft-driven zero-plug-in force connector, such as Figure 1 , 2 As shown, it includes a housing 1, a terminal module 2, a pair of camshafts connected in a transmission manner, and a shield 4. The working principle of the connector is as follows Figure 3 As shown, before the socket connector is locked, the signal pin contact 201 of the terminal module 2 is hidden in the shield 4. When the connector is plugged into and locked with the matching plug connector, the two cam shafts are in accordance with Figure 3 The cam 7 is rotated in the direction of the arrow shown, driving the installed cam 7 to rotate, driving the signal needle to bend and deform, so that the signal needle contact 201 pops out from the side opening of the shield 4; the problem in this process is that when the camshaft rotates to push open the signal needle, the signal needle is subjected to an outward push force, and the signal needle drives the signal needle insulator 202 to deform outward together; because the signal needle insulator 202 fixes the signal needle, the signal needle insulator 202 is fixed to the housing 1 by forced installation, and the first gap S1 between the upper end of the signal needle insulator 202 and the housing 1 is large, and the lower end of the signal needle insulator 202 The second gap S2 with the shell 1 is small. Therefore, in the process that the signal pin drives the signal pin insulator 202 to deform outward, the upper end of the signal pin insulator 202 will be offset toward the side wall of the shell 1, so that a gap is generated in the center of the two signal pin insulators 202 in the same terminal module 2. In addition, the rotation of the signal pin insulator 202 will also cause the signal pin contact 201 to be exposed from the side of the shield 4 in advance, losing the anti-finger contact function. At the same time, the positive pressure of the signal pin holding the camshaft is reduced, and the positive pressure at the signal pin contact point 201 is also reduced, making the signal transmission unreliable.

[0003] Next, combine Figure 4-10 , and a detailed analysis of the causes of this phenomenon is conducted.

[0004] like Figure 4 , 5As shown, the housing 1 is provided with an installation cavity for installing the terminal module 2. For any installation cavity, the end opposite to the plug-in end of the socket connector is the housing small end 101, and the end facing the plug-in end of the socket connector is the housing large end 102. The size of the housing large end 102 is slightly larger than the size of the housing small end 101. There is a terminal module forced installation position 103 between the housing large end 102 and the housing small end 101, and a plurality of anti-slip grooves 104 are provided at the terminal module forced installation position 103. The structure of the anti-slip groove 104 is as shown in FIG. Figure 6 As shown, the upper end of the anti-slip groove 104 is the end facing the plug-in end of the socket connector, and the lower end is the end away from the plug-in end of the socket connector. The upper end of the anti-slip groove 104 is pulled upward, and the lower end is provided with an anti-slip groove step 105, so it is blocked. This results in the mold core being demolded with the anti-slip groove step 105 as the boundary, the upper part of the anti-slip groove step 105 being demolded upward, and the lower part being demolded downward, as shown by the upper and lower arrows in the figure. Since the mold core above the anti-slip groove step 105 needs to be demolded upward, in order to facilitate demolding, the shell large end 102 is formed, and the corresponding other end is the shell small end 101.

[0005] The terminal module 2 is composed of Figure 7 The two module units shown are combined, and the module unit includes a signal pin insulator 202 and a plurality of signal pins fixed on the signal pin insulator 202. The outer side of the signal pin insulator 202 is provided with an anti-slip rib 203 and a strong rib 204. The anti-slip rib 203 is used to cooperate with the anti-slip groove 104 to prevent the terminal module from retreating during the plug-in process. The strong rib 204 is used to have an interference fit with the inner wall of the housing 1 to fix the terminal module. The rest of the outer side of the signal pin insulator 202 is a non-interference fit surface 205, and a gap is formed between the non-interference fit surface 205 and the inner wall of the housing 1.

[0006] When the terminal module 2 is installed into the housing 1 from bottom to top, that is, from the small end 101 of the housing to the large end 102 of the housing, as shown in FIG. Figure 8 As shown, when the anti-slip rib 203 is installed into the shell 1, it will be scraped off by the platform of the anti-slip groove step 105 on the shell 1, losing the interference and the anti-slip function; in addition, when the terminal module 2 is installed into the shell 1, it first passes through the small end 101 of the shell, the assembly guide of the product is not good, and the assembly is not smooth.

[0007] Since the housing 1 has a housing large end 102 and a housing small end 101, after the terminal module 2 is installed, Fig. 9As shown in FIG. 1 , a gap of different sizes is formed between the non-interference fitting surface 205 of the signal pin insulator 202 and the housing 1, namely the first gap S1 and the second gap S2. When the socket connector is assembled with the printed circuit board, there is no limiting structure above the center of the signal pin insulator 202. When the printed circuit board exerts force on the terminal module 2, the two sides of the signal pin insulator 202 are limited by the housing, and the center area of ​​the signal pin insulator 202 forms a gap of different sizes. Fig.10 The force indicated by the arrow causes the signal pin insulator 202 to rotate along the interference point at the small end 101 of the shell. Since the first gap S1 between the signal pin insulator 202 and the large end 102 of the shell is large, the signal pin insulator 202 rotates until the non-interference fit surface 205 is attached to the side of the large end 102 of the shell, and a third gap S3 is formed between the two signal pin insulators 202 in the terminal module 2, and then the signal pin insulator 202 tilts outward and the signal pin contact 101 leaks out of the insulating shield 4, and the terminal loses the anti-touch finger function. At the same time, the rotation of the signal pin insulator 202 reduces the positive pressure of the signal pin holding the camshaft, and the positive pressure of the signal pin contact 201 will also decrease, and the signal transmission is unreliable. Utility Model Content

[0008] The utility model aims to provide a solder-free socket connector, optimizes the structure of the housing for assembling the terminal module, changes the demoulding direction of the housing, thereby reducing or avoiding the rotation of the signal pin insulator and preventing the signal pin contact from leaking out.

[0009] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a solder-free socket connector, including a shell and a terminal module, the terminal module is composed of two module units, the module unit includes a signal pin insulator and a row of signal pins installed on the signal pin insulator, and a cam capable of squeezing the signal pins to make them bend and deform is arranged between the two rows of signal pins of the two module units; an anti-slip groove is arranged on the inner wall of the installation cavity on the shell for installing the terminal module, and the anti-slip groove is a groove through both ends; an anti-slip rib that is interference fit with the anti-slip groove is arranged on the signal pin insulator of the terminal module; the large end of the shell of the installation cavity of the shell is located on the side away from the connector plug-in end, and the small end of the shell is located on the side toward the connector plug-in end.

[0010] The beneficial effects are as follows: easy assembly, when the terminal module is installed into the housing, it first enters from the large end of the housing, and then achieves a tight fit at the small end of the housing, which conforms to the assembly logic; moreover, the large end of the housing can also serve as an assembly guide. During the installation of the terminal module, due to the through-slot design of the anti-slip through-slot, the anti-slip ribs will not be scraped off, and the complete anti-slip ribs can be retained, and the anti-slip effect is achieved by the interference extrusion of the anti-slip ribs on the anti-slip through-slot.

[0011] After the terminal module is assembled, the first gap between the signal pin insulator and the small end of the shell is very small, or even non-existent, and the second gap between the signal pin insulator and the large end of the shell is larger than the first gap. The terminal module will not rotate around the mating point of the small end of the shell, so no gap will be generated between the two signal pin insulators of the terminal module, and the signal pin contacts will not leak out.

[0012] A non-tapered fitting surface is arranged on the inner wall of the installation cavity of the housing at the bottom of the die-cutting groove at the anti-slipping groove, and is used to fit with the non-interference fitting surface of the signal pin insulator on the terminal module.

[0013] The beneficial effects are: the good fit between the non-interference fit surface and the non-taper fit surface can make the size of the first gap between the terminal module and the small end of the shell zero, further avoiding the rotation of the terminal module; in addition, the setting of the non-taper fit surface can increase the contact area with the non-interference fit surface of the terminal module compared to setting it as a conical surface, and achieve complete face-to-face fit, thereby ensuring the reliable installation of the terminal module.

[0014] The length of the non-tapered matching surface in the demoulding direction is smaller than the length of the anti-slip through groove.

[0015] The signal pin insulator of the terminal module is also provided with a reinforcing rib.

[0016] The reinforcing ribs and the anti-slip ribs are alternately arranged along the length direction of the signal pin insulator.

[0017] The beneficial effect is that the force between the terminal module and the housing is more balanced.

[0018] The outer side surface of the terminal module is provided with the strengthening ribs and the anti-slip ribs, and the rest of the outer side surface is provided with a non-interference fitting surface.

[0019] A shield made of insulating material is arranged in the shell, and the shield is installed at the plug-in end of the connector. The signal pin is located in the shield, and an opening for exposing the contact of the signal pin is arranged on the side of the shield.

[0020] The beneficial effect is that the signal pin contact can be protected and the finger-touch protection function can be realized.

[0021] Two terminal modules are arranged in the housing, each terminal module is correspondingly provided with a camshaft, and the cam is mounted on the camshaft.

[0022] The beneficial effect is: a specific implementation method is proposed.

[0023] Of the two camshafts, one is a driving shaft and the other is a driven shaft, and the two camshafts achieve synchronous opposite rotation through a transmission mechanism.

[0024] The beneficial effect is that the signal pin contacts of the terminal module can be ejected from the protective cover synchronously.

[0025] A locking hook is mounted on each camshaft for locking with the matching plug connector.

[0026] The beneficial effects are: it is easy to achieve locking with the plug connector and ensure the reliability of the head seat connection.

[0027] The beneficial effects of the utility model are: 1. The utility model is easy to assemble. When the terminal module is installed into the shell from bottom to top, it first enters from the large end of the shell at the lower end, and then achieves a tight fit at the small end of the shell, which conforms to the assembly logic; moreover, the large end of the shell can also serve as an assembly guide.

[0028] 2. After the terminal module is assembled, there is no leakage of the signal pin contacts. Moreover, during the rotation of the cam, the terminal module will not rotate and the signal pin contacts will not leak, which improves the product's qualification rate and safety.

[0029] 3. After the terminal module is assembled, when the cam rotates and the terminal is opened, the terminal module will not rotate, the force of the terminal holding the camshaft will not decrease, the positive pressure of the camshaft on the terminal remains unchanged, and the positive pressure at the contact point also remains unchanged, thereby ensuring the reliability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the solder-free socket connector described in the utility model;

[0031] Figure 2 This is an exploded view of the structure of the solder-free socket connector described in the utility model;

[0032] Figure 3 It is a schematic diagram of the principle of the technical problems existing in the locking process of the solder-free socket connector in the prior art;

[0033] Figure 4 It is a cross-sectional view of a shell of a solder-free socket connector in the prior art along the width direction;

[0034] Figure 5 It is a cross-sectional view along the length direction of the shell of the solder-free socket connector in the prior art;

[0035] Figure 6 It is a schematic diagram of the position of the anti-slip groove of the shell of the solder-free socket connector in the prior art;

[0036] Figure 7 It is a schematic diagram of the structure of the module unit constituting the terminal module in the solder-free socket connector;

[0037] Figure 8It is a cross-sectional view of the terminal module of the solder-free socket connector in the prior art at the position of the anti-slip groove after being assembled with the housing;

[0038] Fig. 9 It is a schematic diagram of the matching relationship between the terminal module and the housing before the solder-free socket connector is assembled in place in the prior art;

[0039] Fig.10 It is a cross-sectional view of a solder-free socket connector in the prior art after being assembled in place;

[0040] Fig.11 It is a cross-sectional view of the shell of the solder-free socket connector in the utility model along the length direction;

[0041] Fig.12 It is a cross-sectional view of the housing of the solder-free socket connector of the utility model along the width direction;

[0042] Fig.13 It is a schematic diagram of the position of the anti-dropping through groove of the shell of the solder-free socket connector in the utility model;

[0043] Fig.14 It is a cross-sectional view of the terminal module of the solder-free socket connector of the utility model at the position of the anti-dropping groove after being assembled with the housing;

[0044] Fig.15 This is a cross-sectional view of the solder-free socket connector of the utility model after being assembled in place;

[0045] Markings in the figure: 1. Shell, 101. Small end of shell, 102. Large end of shell, 103. Forced installation position with terminal module, 104. Anti-slip groove, 105. Anti-slip groove step, 106. Non-tapered mating surface, 107. Anti-slip through groove, 2. Terminal module, 201. Signal pin contact, 202. Signal pin insulator, 203. Anti-slip rib, 204. Forced installation rib, 205. Non-interference fitting surface, 3. Long-axis lock hook component, 4. Protective cover, 5. Screw, 6. Short-axis lock hook component, 7. Cam, 8. Printed circuit board, 9. Base. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention in any way.

[0047] See attached Figure 1 As shown, the main structure of the solder-free socket connector described in the utility model is similar to that of the solder-free socket connector in the prior art, and also includes a housing 1, a terminal module 2, a long-axis locking hook component 3, a shield 4, and a short-axis locking hook component 6. The terminal module 2 is assembled in the housing 1 and is located at the bottom of the housing 1. The terminal module 2 is composed of two module units that are buckled together. The module units are as shown in FIG. Figure 7As shown, it includes a signal pin insulator 202 and a plurality of signal pins fixed on the signal pin insulator 202, a signal pin contact 201 is arranged at the front end of the signal pin, and the tail end of the signal pin is used to connect with the printed circuit board. The structures of the long-axis lock hook component 3 and the short-axis lock hook component 6 are basically the same, both including a rotating shaft, a cam 7 mounted on the rotating shaft and a lock hook mounted on the rotating shaft, and the two rotating shafts can realize opposite synchronous rotation through gear meshing. After assembly, the cam 7 is located between the two rows of signal pins of the same terminal module 2, and the two rows of signal pins are squeezed and deformed and bent by the rotation of the cam 7, so that the signal pin contact 201 is exposed from the opening on the side of the shield 4, so that it can be in contact with the terminal of the plug connector.

[0048] like Fig.11 , 12 As shown in 13, the anti-slip groove 107 provided on the inner wall of the mounting cavity for mounting the terminal module 2 on the housing 1 is a vertically through groove, so the mold core at the anti-slip groove 107 can be demoulded from the bottom of the housing, and the mold core above the anti-slip groove 107 is demoulded from the top of the housing, that is, Fig.11 As shown by the up and down arrows in the figure. Therefore, the large end 102 of the housing installation cavity is located on the side away from the connector plug-in end, and the small end 101 of the housing is located on the side facing the connector plug-in end. When the terminal module 2 is installed into the housing 1 from bottom to top, the through groove setting of the anti-slip groove 107 will not scratch the anti-slip rib 203 of the signal pin insulator, so the anti-slip rib 203 and the anti-slip groove 107 can achieve anti-slip by interference extrusion (such as Fig.14 Even if it is slightly dislodged, the module will still be forced back to fit tightly against the housing when the printed circuit board is installed.

[0049] Further, such as Fig.11 As shown, a section of the inner wall area of ​​the housing corresponding to the upper end of the anti-slip groove 107 adopts a non-taper design, which is used as a non-taper mating surface 106 to fit with the non-interference mating surface 205 of the signal pin insulator 202 on the terminal module 2. Compared with the inner wall of the housing installation cavity being set as a conical surface except for the anti-slip groove 107, the utility model sets a section of non-taper mating surface 106 at the upper end of the anti-slip groove 107, that is, at the bottom of the draft mold at the anti-slip groove 107, which can increase the contact area between the inner wall of the housing and the terminal module 2. This is because, if all are conical surfaces, after the terminal module 2 is installed, it is difficult for the non-interference mating surface 205 on its side to completely fit with the conical surface, so that the contact area is small, affecting the reliability of the installation of the terminal module 2; and after setting a section of non-taper mating surface 106, the non-taper mating surface 106 and the non-interference mating surface 205 can fit face to face, thereby increasing the contact area between the two and ensuring the reliable installation of the terminal module 2.

[0050] After the terminal module is assembled, the first gap S1 between the signal pin insulator 202 and the small end 101 of the housing is very small, or even non-existent, and there is a second gap S2 between the signal pin insulator 202 and the large end 102 of the housing, which is larger than the first gap S1. Fig.15 As shown, the force at the joint of the two signal pin insulators 202 in the terminal module 2 is upward as shown by the arrow in the figure. At this time, the terminal module 2 will rotate along the fulcrum where the shell first contacts the module, that is, the small end is the fulcrum rotation, but the first gap S1 at the small end is very small or even there is no gap. The terminal module 2 is clamped by the shell 1 and there is no rotation space. There will be no gap in the center of the terminal module 2, and the signal pin contact 201 will not leak out.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A solder-free socket connector, comprising a housing (1) and a terminal module (2), wherein the terminal module (2) is composed of two module units, the module units comprising a signal pin insulator (202) and a row of signal pins mounted on the signal pin insulator (202), and a cam (7) capable of squeezing the signal pins to bend and deform them is arranged between the two rows of signal pins of the two module units; the characteristics are as follows: An anti-dropout through groove (107) is provided on the inner wall of the installation cavity of the shell (1) for installing the terminal module (2), and the anti-dropout through groove (107) is a through groove with two ends passing through; an anti-dropout rib (203) which is interference-fitted with the anti-dropout through groove (107) is provided on the signal pin insulator (202) of the terminal module (2); the shell large end (102) of the installation cavity of the shell (1) is located on a side away from the connector plug-in end, and the shell small end (101) is located on a side facing the connector plug-in end.

2. The solder-free socket connector according to claim 1, characterized in that: A non-tapered fitting surface (106) is provided on the inner wall of the installation cavity of the housing (1) at the bottom of the die-cutting mold at the anti-dropping through groove (107) for fitting with the non-interference fitting surface (205) of the signal pin insulator (202) on the terminal module (2).

3. The solder-free socket connector according to claim 2, characterized in that: The length of the non-tapered matching surface (106) in the demoulding direction is shorter than the length of the anti-slip through groove (107).

4. The solder-free socket connector according to claim 1, characterized in that: The signal pin insulator (202) of the terminal module (2) is also provided with a reinforcing rib (204).

5. The solder-free socket connector according to claim 4, characterized in that: The reinforcing ribs (204) and the anti-slip ribs (203) are arranged alternately along the length direction of the signal pin insulator (202).

6. The solder-free socket connector according to claim 4, characterized in that: The strengthening ribs (204) and the anti-slip ribs (203) are provided on the outer side surface of the terminal module (2), and the remaining part of the outer side surface is provided with a non-interference fitting surface (205).

7. The solder-free socket connector according to claim 1, characterized in that: A shield (4) made of insulating material is arranged in the housing (1), the shield (4) is installed at the plug-in end of the connector, the signal pin is located in the shield (4), and an opening for exposing the signal pin contact (201) is arranged on the side of the shield (4).

8. The solder-free socket connector according to claim 1, characterized in that: Two terminal modules (2) are arranged in the housing (1), each terminal module (2) is correspondingly provided with a camshaft, and the cam (7) is mounted on the camshaft.

9. The solder-free socket connector according to claim 8, characterized in that: Of the two camshafts, one is a driving shaft and the other is a driven shaft, and the two camshafts achieve synchronous opposite rotation through a transmission mechanism.

10. The solder-free socket connector according to claim 8, characterized in that: A locking hook is mounted on each camshaft for locking with the matching plug connector.

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