Buckle type socket capable of decomposing torque in sections and electric connector

Abstract

The utility model discloses a segmented torque decomposition buckle-type circular socket and an electric connector, belongs to the technical field of electric connectors, and solves the technical problems that a conventional multi-core buckle-type circular connector is strenuous in plugging and pins are easy to break. The socket comprises a socket body, three spiral grooves are formed in the circumferential surface of the socket body at equal intervals, and each spiral groove is composed of a starting section, a deviation correcting section, a pushing section and a buckling section. Wherein the initial section is in a step shape and is used for pre-insertion of a plug, the step plane has a power assisting effect, and the sliding block can generate power which is firstly tightened and then loosened when moving from the step vertical surface to the step plane, so that a contact pin can slide into a jack; the groove surface of the deviation correction section inclines outwards, has radial centripetal force pointing to the inner side of the socket, and is used for correcting deviation generated by movable fit of the plug and the socket, so that the plug and the socket are coaxial and concentric, a contact pin can smoothly enter a jack, and the occurrence of pin clamping and pin folding is avoided. The utility model has the beneficial effects of small torque resistance, easy and smooth insertion, improved working efficiency and prolonged service life.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a snap-on type electric connector with segmented torque decomposition and a socket comprising the same. Background Art

[0002] An electrical connector is a common component used to connect electronic devices, which can achieve electrical connection and signal transmission between electronic devices.

[0003] An electrical connector is usually composed of a plug and a socket. A conductive pin is fixed at one end of the plug, and a conductive socket is provided inside the socket. When the plug and the socket are plugged together and the pin is in close contact with the socket, the current or signal is connected between the plug and the socket, thereby realizing the transmission of current or signal between electronic devices.

[0004] Traditional connection methods of electrical connectors include threaded connection and snap-on connection.

[0005] The threaded connection connects the plug and the socket together by matching the threads of the ferrule nut with the socket. Figure 1 (a). This connection method has a long spiral stroke and the resistance overcome by each rotation is relatively small, so it is relatively labor-saving to operate (just like a winding mountain road). In addition, the friction of the thread bevel and the self-locking characteristics of the pitch angle make the connection reliable and stable, and not easy to loosen. The disadvantage is that the spiral stroke is long and more turns are required to complete the connection, which leads to a slow connection speed and relatively complicated operation.

[0006] The snap connection is to snap the snap cap into the slot of the socket to tightly connect the plug and the socket together, see Figure 1 (b). This connection method has the advantages of quick plugging and unplugging and simple operation due to its short stroke. The disadvantages are short stroke, high friction resistance, and relatively laborious plugging and unplugging (like climbing a mountain directly, which is steep and laborious, saving time but not effort), and its stability is inferior to that of threaded connection.

[0007] The spiral snap-on connection is an electrical connector that combines the advantages of the first two. Figure 1 (c). It has both a snap-on locking function, which allows for quick connection, and a spiral torque propulsion function, which makes the connection relatively labor-saving and stable, and is widely used.

[0008] However, these electrical connection methods all have some problems, especially when plugging and unplugging multi-core connectors, the operation is particularly laborious and prone to problems such as stuck pins and pin breakage. These problems mainly stem from the dynamic fit design of the plug and socket (to facilitate smooth plugging of the two) and the interference fit of the pin and socket (to facilitate close contact between the two to ensure the passage of signals or current).

[0009] The dynamic fit design creates a certain gap between the plug and the socket, which may cause the two to be misaligned, thus affecting the smooth insertion of the pin into the socket. When this misalignment occurs, pin-thrusting may occur (the pin pushes against the edge of the socket). Especially in multi-core connectors, as long as one pin droops or deviates, the entire plug may not be inserted into the socket smoothly.

[0010] In this case, when an experienced operator encounters a pin, he will usually back off (loosen it) and then push harder (push it up) so that the pin can slide into the hole. However, an inexperienced or impatient operator will use brute force such as hard twisting, hard pushing and hard insertion, which can easily cause problems such as pin bending, pin breakage, pin crookedness and pin breakage, affecting normal insertion.

[0011] For threaded connections, due to the large number of turns and long travel, the resistance overcome by each rotation is relatively small and the force is dispersed. However, the spiral guide grooves are designed at an angle or stepped angle of the traditional threaded connection, see Figure 2 The torque only produces an upward thrust, without a radial thrust. When the pin ejection phenomenon occurs, the torque force is often unable to move the pin. At this time, it is still necessary to rely on manual retreat or force to overcome it.

[0012] Although the snap-on connection is simple to operate, it is a direct insertion and there is no torque force to help overcome the friction between the pins of the jack; there is no radial force to compensate for the ejection pin problem caused by the different axes due to the offset.

[0013] In addition, the spiral grooves in the prior art are all slope structures, see Figure 7 , and the notch is rectangular, and the spiral groove surface is parallel. The rotational force of this structure cannot generate radial centripetal force, and can only be used to guide the block to slide in the groove to drive the plug to move and realize the plug-in function, but it does not have the function of coaxial correction, and cannot effectively avoid the problem of the plug being stuck at the initial stage of plugging.

[0014] The existing technologies all consider the spiral slope or the stroke length, and cannot solve the eccentric and non-coaxial problem of the plug and socket. Summary of the invention

[0015] In view of the problems existing in the prior art, the utility model proposes a segmented decomposition torque snap-on circular socket and connector which can reduce the effort when a multi-core plug is inserted into a socket and facilitate the pin clamping.

[0016] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0017] In the first aspect, the utility model provides a segmented torque decomposition snap-on circular socket, comprising a socket body, wherein three spiral grooves are arranged at equal intervals on the circumference of the socket body, and the spiral grooves start from the bottom end face of the socket body; the spiral grooves are composed of a starting section A, a correction section B, a push section C and a snap-on section D. The starting section A is in the shape of a step, and the groove surface of the correction section B is inclined outward, and the inclination angle gradually decreases as the groove rises, and is zero at the end of the correction section; the push section C is used to promote the tight insertion of the plug and the socket. The snap-on section is used to lock the plug in the socket to prevent the plug from loosening or slipping out of the socket.

[0018] The step surface of the starting section A is a triangular plane, which is composed of a short side, a long side and a round side. The round side is formed by the spiral groove surface and the outer circumference of the socket body; the short side is the entrance side of the spiral groove, and the long side is the intersection line of the starting section A and the groove surface of the correction section B. The starting position of the spiral slope surface of the correction section B is the intersection point E of the long side and the short side.

[0019] The initial inclination angle of the groove surface of the correction section B is 10 to 15 degrees.

[0020] The outer peripheral surface of the socket body is provided with a positioning hole, and a positioning pin is fixed in the positioning hole. The positioning pin is used to position the card block or guide block in the buckle section D to prevent the card block or guide block from retreating to the starting end along the spiral groove.

[0021] The length of the spiral groove is less than two-thirds of the circumference of the socket body, and the height of the spiral groove is less than two-thirds of the height of the socket body.

[0022] The spiral groove is arranged on the inner circumferential surface or the outer circumferential surface of the socket body.

[0023] In the second aspect, the utility model provides an electrical connector, including the segmented decomposition torque snap-on circular socket, plug and snap-on cap, the snap-on cap is provided with a slider or a block matching the spiral guide groove of the socket, for guiding the plug into the socket and utilizing the snap-on groove of the spiral groove to achieve a firm connection.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] The socket spiral groove adopts segmented groove surfaces with different slopes, different external inclination angles and different shapes, which disperses the torque resistance of plug and socket insertion, making it easy for the pin to enter the socket, and effectively solves the technical problems of multi-core spiral connectors that are difficult to insert and easy to get stuck. Specifically:

[0026] 1. First, the entrance of the spiral groove of the socket body adopts a step structure, which not only has the guiding function of the conventional card block, but also has the pre-insertion function of the plug entering the socket first, reducing the probability of the conventional spiral groove entrance directly entering the spiral groove slope, which is easy to get stuck. Secondly, the step plane has a force loss effect. When the card block moves from the step facade to the step plane, it will suddenly lose resistance, generating a top force that tightens first and then loosens (equivalent to a skilled worker tightening it first, then retreating and loosening it, allowing the pin to slide into the socket, and then inserting it with force to effectively insert the plug into the socket), which helps the pin slide into the plug and avoids the pin jamming phenomenon. Insertion is convenient, smooth, and efficient.

[0027] 2. The groove surface of the socket spiral groove correction section is set to an outward tilted structure, so that it generates a radial centripetal force pointing to the inside of the socket to correct the deviation caused by the dynamic fit of the plug and socket, so that the plug and socket are coaxial and concentric, thereby ensuring that the pin can be smoothly inserted into the socket and avoiding the occurrence of pin jamming and pin folding. This improves the success rate of plugging and extends the service life of the connector.

[0028] 3. The entrance of the socket spiral groove is changed from a conventional equal-width parallel groove to an inclined sharp angle gradually widening groove, which reduces the resistance and increases the radial centripetal force when the plug enters the socket, effectively reducing the corresponding torque resistance and ensuring that the pin enters the socket smoothly. The entire structural design is ingenious, reasonable and accurate.

[0029] 4. The socket spiral groove deviation correction section B adopts a double-bevel (spiral rising slope and outer inclined surface) guiding structure. Conventional spiral grooves have only one rising slope, and it is a ramp of equal width from beginning to end, with large initial resistance (especially prominent in the ejector state). The starting ramp surface of the utility model is set as a triangular outer inclined gradually rising ramp, so that the ramp surface starts from zero friction resistance (entering the rising slope from the corner tip of the triangle) and the resistance gradually increases, the force is gentle, the torque resistance is small, and the pin is easier to fall into the socket, further avoiding the pin / pin jam phenomenon.

[0030] 5. The socket is designed with three equally spaced spiral grooves, which not only produces a coaxial correction effect on the socket plug, but also designs an outward inclined slope on the rising slope of the spiral groove. The combination of the two produces a better coaxial correction effect, making the coaxiality and concentricity of the pins and sockets of the plug and socket more effective, and preventing the pins from being damaged by the ejector pins from all directions, ensuring the smooth insertion of the plug and socket, extending the service life of the connector, and reducing the replacement and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a comparative schematic diagram of the socket structure (stroke) of the prior art threaded connection (a) and snap connection (b), and the spiral snap connection (c) of the utility model;

[0032] Figure 2 This is a schematic diagram of the structure and block path of the utility model;

[0033] Figure 3 This is a partial enlarged schematic diagram of the starting section and the correction section of the spiral groove of the utility model.

[0034] Figure 4 Schematic diagram comparing the spiral groove structure of the utility model (a) and the prior art (b);

[0035] Figure 5 Schematic diagram comparing the spiral groove surface structure of the utility model (a) and the prior art (b);

[0036] Figure 6 It is a schematic diagram of the structure of the spiral groove starting section (triangular step surface) and the correction section of the utility model;

[0037] Figure 7 The utility model is a schematic diagram of the outer inclined structure of the spiral groove correction section and the radial centripetal force.

[0038] Figure 8 This is a schematic cross-sectional view of the spiral groove (rectangular) structure of the prior art

[0039] Figure numerals: 1, socket body; 2, spiral groove; 3, guide block; 4, positioning card hole; A, starting section A; A1, long side; A2, short side; A3, round edge; B, correction section B; C, tightening section C; D, buckle section D; E, intersection. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings of the present invention.

[0041] Embodiment 1:

[0042] like Figure 2 As shown, a segmented decomposition torque snap-on circular socket includes a socket body 1, and three spiral grooves 2 are arranged at equal intervals on the circumference of the socket body 1. The spiral grooves 2 start from the bottom end surface of the socket body 1 and extend upward along the circumference in a spiral. The length of the spiral groove is less than two-thirds of the circumference of the socket body, and the height of the spiral groove is less than two-thirds of the height of the socket body 1. The corresponding plug guide block can move along the spiral path of the spiral groove and be fixed by the snap-on groove.

[0043] The spiral groove 2 is composed of a starting section A, a correction section B, a tightening section C and a buckle section D.

[0044] The starting section A is in the shape of a step, which facilitates the alignment of the corresponding plug pin with the socket jack, thus achieving the effect and function of pre-insertion. (1) The step not only has the conventional guiding function of the card block, but also has the function of cohesion from the step plane to the rear correction section B. This is like an aircraft carrier taking off, sliding on the plane for a short distance (starting), generating acceleration kinetic energy, and then rushing towards the blue sky along the deck slope (correction section B slope). (2) The step also has the function of helping the pin to slide smoothly into the socket. This is because when the card block overcomes the vertical resistance of the step and enters the step plane, it will generate impact force due to sudden loss of force. This is like when a person encounters a pin, he adopts the method of retreating (losing force on the plane) and then inserting (punching) to use the pin to slide into the socket smoothly, which helps to overcome the pin phenomenon caused by the misalignment of the multi-core socket plug.

[0045] The groove surface of the correction section B is tilted outward to form a coaxial and concentric thrust to correct the processing deviation and eliminate the occurrence of ejector pins (see Figure 2 ). The inclination angle decreases gradually as the groove rises, and decreases to zero degree at the tightening section C to ensure a smooth transition between the front and rear sections (A, C).

[0046] The connecting surface between the correction section B and the starting section A is a circular arc surface transition, which is used to cooperate with the insertion of the plug impact into the center axis of the correction hole of the B section of the socket. At the same time, it assists in correcting the coaxial deviation. To ensure that the pin of the spiral rising slope (unchanged) with the sharp triangle gradually rising ramp enters the socket.

[0047] The principle of the correction is: when the groove surface of the spiral groove is tilted downward toward the outside of the socket (that is, the inclination direction of the groove surface is opposite to the center axis direction of the socket), the socket will be subjected to a centripetal force directed to the inside of the socket. This is because when the slider moves in the spiral groove, the torque it receives will be decomposed along the inclined groove surface, and this decomposition produces a radial component force directed toward the center axis of the socket (that is, inward). Due to the existence of this component force, the slider will generate an inward thrust on the socket. When each slider in the three spiral grooves is subjected to such a thrust, they will make the socket and the plug equal in offset on the circumferential surface, making the center axis of the plug and the socket identical, thereby correcting the offset caused by the dynamic fit of the socket and the plug, and further contributing to the concentricity and coaxiality of the pin and the socket, facilitating the pin to slide into the socket, avoiding the jamming of the pin affecting the normal insertion, and improving the stability and efficiency of the connection.

[0048] The spiral rising surface of the pushing section C is a plane, which is used to reduce the concentration of the contact surface and overcome the strengthening of the contact surface to position the end of the plug inserted into the socket.

[0049] The buckle section D is used to lock the plug in the socket to prevent the plug from loosening or slipping out of the socket. The plug guide block can move along the spiral path of the spiral groove and be fixed by the buckle groove.

[0050] See also Figure 3(a) The groove body of the prior art is a simple spiral slope, which only has the function of guiding insertion and solving the problem of guiding and pushing the guide block, but cannot solve the problem of the initial pin being stuck due to the eccentricity of the pin hole and the different axes.

[0051] See also Figure 3 (b) Although the integral ascending rail of the trough of the utility model is also a spiral slope, it is a step structure at the entrance of the trough, which has the function of direct insertion and impact assistance, and is combined with the second-stage spiral slope to be a downward-inclined spiral slope, which not only has the guiding and propulsion function of the guide block, but also generates a centripetal force for propulsion (part of the needle enters the hole) and correction at the entrance, playing a coaxial role of the pin and the hole. Thus, the problem of initial eccentric needle jam is solved.

[0052] Example 2

[0053] In this embodiment, based on the above, the step plane is set as a triangular plane (see Figure 4 (b) The step surface of the starting section A is a triangular plane, and the triangle is composed of a short side A3, a long side A2 and a round side A1. The round side A1 is the outer circumference of the socket, the short side A3 is the entrance side of the spiral groove, and the long side A2 is the transition between the starting section A and the correction section B. The starting position of the spiral slope of the correction section B is the acute angle intersection point E formed by the transition side A2 and the bottom of the spiral groove. The spiral slope of the correction section B gradually forms from narrow to wide ( Figure 4 (b)), thereby reducing the initial friction of the plug and helping the pin to slide into the socket. The spiral ascending track surface of the correction section B is inclined horizontally downward ( Figure 6 ), which is transitioned with the connecting surface of the starting section through a rounded surface, is used to cooperate with the punch of the step gap, helps the pin to enter the socket, and has the function of assisting in correcting the coaxial deviation. At the same time, since the starting position E of the spiral slope of the correction section B is the same as the starting position of the starting section A, the guide block is more gentle and smooth from the beginning due to the dual effects of the initial section A (retraction force) and the correction section B (correction coaxiality), making it easier to align the pin and the socket coaxially and plug them together smoothly.

[0054] Embodiment 3:

[0055] In this embodiment, the initial inclination angle range of the groove surface of the correction section B is set to 10-15 degrees, which prevents the eccentric force from being too large and reducing the effective plugging force, and prevents the correction eccentric force from being too small and affecting the insertion of the pin into the socket. It ensures that the required coaxial and concentric correction force is present, and does not increase the friction of the inclined surface and affect the smoothness of the plugging.

[0056] While ensuring that the rising angle remains unchanged, the pointed triangle gradually rising ramp is more conducive to the insertion of the pins.

[0057] Embodiment 4:

[0058] A positioning hole 4 is provided at the buckle section D on the outer circumferential surface of the socket body 1. A positioning pin is fixed in the positioning hole 4, which is used to lock the card block in the buckle groove of the buckle section D and has a wear-resistant function (the wear resistance of the positioning pin is higher than that of the socket body). When plugging in, the card block moves along the spiral groove and is fixedly buckled in the buckle groove of the buckle section of the spiral groove. The three positioning pins on the socket body accurately position the card block in the buckle groove. When it is screwed in and buckled, the vibration of the card block entering the buckle section groove at the end of the spiral groove can be felt, so that the operator can clearly know whether the plug and socket are plugged in place.

[0059] Embodiment 5:

[0060] See also Figures 3 to 5 The initial outward inclination angle of the groove surface of the correction section B is 10 to 15 degrees. As the spiral groove rises, it gradually changes from large to small and becomes 0 degrees in the tightening section C.

[0061] Embodiment 6:

[0062] The length of the spiral groove is two-thirds of the circumference of the socket, and the height of the spiral groove occupies two-thirds of the height of the socket, ensuring that its position in the socket is stable, plugging and engaging are quick, and the pins and sockets are in full contact, so as to increase the safety of the socket and prevent the wires or connectors from loosening or slipping out during use.

[0063] Embodiment 7:

[0064] The spiral groove is arranged on the inner circumference surface or the outer circumference surface of the socket body, and is used for the connector of the plug corresponding to the outer circumference block or the inner circumference block, which is flexible and has a wider application range.

[0065] Example 8.

[0066] A circular snap-on electrical connector includes any of the above-mentioned segmented torque snap-on circular sockets, wherein the plug includes a slider or a card block matching the spiral groove of the socket, which is used to guide the plug into the socket and achieve a firm connection using the spiral groove and the card groove.

[0067] This connector has a compact structure, simple operation, stable and reliable connection, and anti-pin jamming function. It is suitable for various application scenarios that require fixing wires or connectors.

[0068] The process of inserting a plug into a socket can be divided into four stages (three stages when the step surface is a triangle), namely:

[0069] 1. Initial alignment stage: This stage is mainly to ensure that the plug pin can correctly enter the socket hole. The step structure of the spiral socket is designed to adapt to the entrance of the socket hole. Since the starting section is a step structure, after the plug is slightly inserted into the socket, when it enters the step plane, it has the effect of first tightening-loosening (backward)-tightening, that is, simulating the effect of tightening first, then backing off, and then forcing the plug together when it is manually inserted, so that the pin can avoid the top edge and has a tendency to slide into the socket.

[0070] 2. Coaxial correction stage: When reaching the second section of the double-bevel slope section, the rotating bevel force is used for coaxial correction to make the gap of the socket plug dynamic fit coaxial as a whole, ensuring that the multi-core pins and sockets are coaxial, so that the pins can smoothly enter the sockets.

[0071] 3. Progressive guidance stage (guide groove effect): In this stage, the plug continues to be inserted into the socket, and the pin gradually goes deeper into the socket. As the plug goes deeper, the fit between the pin and the socket becomes tighter, and the shape or structure inside the socket guides the pin to align correctly and move steadily until the plug is fully inserted into the socket, and the pin and the socket reach the final tight fit. This tight fit ensures low resistance, high stability current transmission, and minimized signal loss or interference.

[0072] 4 Final locking stage (snap): The snap block enters the snap groove to lock the plug and socket to prevent it from loosening or falling off.

Claims

1. A segmented torque-decomposing snap-on circular socket, comprising a socket body (1), wherein three spiral grooves (2) are arranged at equal intervals on the circumference of the socket body (1), wherein the spiral grooves (2) start from the bottom end surface of the socket body (1); characterized in that: The spiral groove (2) is composed of a starting section A, a correction section B, a push section C and a buckle section D; the starting section A is in a step shape, the groove surface of the correction section B is inclined outward, and the inclination angle gradually decreases as the groove rises, and the inclination angle is zero at the push section C; the push section C is used to push the plug and the socket to fit tightly together; the buckle section is used to buckle the plug in the socket to prevent the plug from loosening or falling out of the socket.

2. The segmented decomposition torque snap-on circular socket according to claim 1, characterized in that: The step surface of the starting section A is a triangular plane, and the triangular plane is composed of a short side (A3), a long side (A2) and a round side (A1); The starting position of the spiral slope of the correction section B is the intersection point (E) of the long side (A2) and the short side (A3).

3. The segmented decomposition torque snap-on circular socket according to claim 1, characterized in that: The initial inclination angle of the groove surface of the correction section B is 10 to 15 degrees.

4. The segmented decomposition torque snap-on circular socket according to claim 1, characterized in that: A positioning hole (4) is provided at a buckle section D on the outer peripheral surface of the socket body (1), and a positioning pin is fixedly arranged in the positioning hole (4).

5. The segmented decomposition torque snap-on circular socket according to claim 1, characterized in that: The length of the spiral groove is less than two-thirds of the circumference of the socket, and the height of the spiral groove is less than two-thirds of the height of the socket.

6. The segmented decomposition torque snap-on circular socket according to claim 1, characterized in that: The spiral groove is arranged on the inner circumferential surface or the outer circumferential surface of the socket body.

7. A snap-on circular electrical connector, comprising the segmented decomposition torque snap-on circular socket according to any one of claims 1 to 6.

8. The snap-on circular electrical connector according to claim 7, characterized in that: The utility model comprises a plug and a card sleeve cap, wherein the card sleeve cap is provided with a slide block or a card block matching with a spiral guide groove of a socket, and is used for guiding the plug into the socket and realizing a firm connection by utilizing a card buckle groove of the spiral groove.

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