Detachable quick locking device

Abstract

The invention discloses a detachable quick locking device which is used for quickly locking and unlocking a D-SUB electric connector plug and a D-SUB electric connector socket and comprises a male locking assembly, a female locking assembly, a safety pin, a taking and sending tool and an unlocking push rod. The male locking assembly is composed of an inner sleeve, a retaining clamp, an outer sleeve, a spring and a fixing clamp. The female locking assembly is composed of a dual-purpose screw, a fixing claw, a gasket, a spring washer and a nut. The female locking assembly is installed on the socket, the male locking assembly is installed on the plug, locking is achieved through pressing operation on the inner sleeve, and accidental unlocking can be avoided by inserting the safety pin into the inner sleeve. During unlocking, the safety pin is taken out through a taking and sending tool, and then the unlocking push rod is inserted and pressed to achieve unlocking. The device can be used for replacing a screw locking mechanism of a D-SUB electric connector, and quicker and more convenient locking and reliable secondary locking insurance are realized.

Description

Technical Field

[0001] The invention relates to the technical field of quick locking structures, and in particular to a detachable quick locking structure for an electrical connector. Background Art

[0002] In the use of D-SUB electrical connectors, the locking method of the plug and the socket is screw locking, and the locking and unlocking operations are relatively cumbersome. In order to ensure that the locking is in place, tools such as torque screwdrivers or torque wrenches are usually required. In some environments with relatively small spaces, it is not convenient to disassemble the operation, which affects the use efficiency, and the production and maintenance costs are relatively high. In addition, it is easy for the screws of the socket to loosen when the plug is unlocked. Summary of the invention

[0003] The object of the present invention is to provide a detachable quick locking device to meet the requirements of high reliability and high efficiency quick locking connection between the plug and the socket of a D-SUB electrical connector, so that the locking and unlocking of the D-SUB electrical connector are more convenient and the operation is simpler, thereby achieving the purpose of saving time and improving efficiency, and having a secondary locking and disassembly function to prevent accidental unlocking, thereby facilitating product maintenance.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A detachable quick locking device consists of a male locking component, a female locking component, a safety pin, a pick-up and delivery tool, and an unlocking push rod, wherein the male locking component consists of an inner sleeve, a retaining clip, an outer sleeve, a spring, and a fixing clip; the female locking component consists of a dual-purpose screw, a fixing claw, a gasket, a spring washer, and a nut.

[0006] The inner sleeve is a hollow cylindrical structure, with a circle of outwardly protruding trapezoidal steps in the middle. The inner cavity is designed with a receiving groove for accommodating the retaining clip and a step surface for locking. The end of the inner sleeve is designed with an inner cavity cone for locking and guiding. The upper end of the outer sleeve is designed as an inner concave arc surface, and the lower end is connected and fixed to the fixing clip by riveting; the spring is installed between the inner sleeve and the outer sleeve. The middle of the fixing claw is designed as a hollow structure, and its head is a cross-shaped split groove, which is designed with 4 claws of the same size and evenly arranged on the circumference. The fixing claw is connected and fixed to the dual-purpose screw by interference fit.

[0007] The female locking assembly is connected and fixed to the socket through the threaded engagement of the dual-purpose screw and the nut.

[0008] The male locking assembly is connected and fixed to the plug by clamping the flange of the plug through the elastic force of the fixing clamp.

[0009] When locking, a downward axial thrust is applied to the exposed part of the inner sleeve. Under the action of its trapezoidal step, the spring is compressed. In the process of the inner sleeve continuously moving downward, the inner cavity conical surface at its end contacts the four claws on the fixed claw. Under the action of the inner cavity conical surface, the claws gather toward the middle and can pass through the step surface of the inner sleeve. When all the claws pass through the step surface, the claws return to the vertical upward free state when they are opened. At this time, after the axial thrust is released, under the action of the spring elastic force, the lower end surface of the claw presses the step surface of the inner sleeve, and the quick locking can be completed. In order to prevent accidental unlocking, the embedded end of the pick-up and delivery tool is used to insert the safety pin into the inner sleeve. After the step surface of the safety pin passes through the claw of the retaining clip, it is firmly fixed. The needle rod of the safety pin is inserted into the center of the fixed claw, which prevents the claws from gathering toward the middle, realizing reliable and stable quick locking and secondary locking safety functions to prevent accidental unlocking. This avoids the influence of external factors such as vibration, which causes the claws to loosen, and then causes the locking failure.

[0010] When unlocking, first insert the unloading end of the pick-up tool into the inner sleeve. This operation can open the claws of the retaining clip, thereby releasing the claws from fixing the safety pin. The first unlocking can be completed by taking out the safety pin with the pick-up tool. Further, insert the unlocking push rod into the inner sleeve and apply a downward thrust. As the thrust increases, the conical countersunk hole at the mouth of the unlocking push rod can gather the four claws to the middle. After gathering, the claws are separated from the step surface. Under the action of the spring force, the inner sleeve withdraws from the dual-purpose screw. When the trapezoidal step of the inner sleeve contacts the concave arc surface of the outer sleeve, it means that the unlocking is in place. Finally, take out the unlocking push rod to complete the entire unlocking operation.

[0011] The beneficial effects achieved by the present invention are:

[0012] The detachable quick locking device described in the present invention is designed and optimized in terms of structural form, unlocking and locking operation methods, secondary locking methods, etc., and has higher locking reliability, convenient operation, adaptability to complex application scenarios and versatility, and can meet the requirements of high reliability, high efficiency and quick locking connection between the plug and the socket of the D-SUB electrical connector. Through structural improvement and optimization, the locking mechanism is improved, and its reliability, processability, operability and maintainability are all improved, which is mainly manifested in the following aspects:

[0013] (1) The locking device can be freely disassembled and separated from the plug and socket of the D-SUB electrical connector, which is convenient for maintenance and replacement;

[0014] (2) Whether the locking is completed can be judged by observing the height of the inner sleeve extending out, and the locking status is clear at a glance, which is convenient for inspection;

[0015] (3) The pressing operation replaces the threaded connection operation, making locking and unlocking faster and more convenient;

[0016] (4) When unlocking, the female locking assembly on the socket will not be loosened, and the fixation of the socket will not be affected;

[0017] (5) Inserting the safety pin can prevent accidental unlocking and ensure reliable locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic cross-sectional structural diagram of a detachable quick locking device in a fully locked state.

[0019] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure before the unlocking tool is inserted during unlocking.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the inner casing.

[0021] Figure 4 It is a structural schematic diagram of the picking and delivering tool.

[0022] In the figure: 1-socket, 2-plug, 3-male locking assembly, 31-inner sleeve, 311-trapezoidal step, 312-accommodating groove, 313-step surface, 314-inner cavity cone, 32-retaining clip, 321-claw, 33-outer sleeve, 331-concave arc surface, 34-spring, 35-fixing clip, 4-female locking assembly, 41-dual-purpose screw, 42-fixing claw, 421-hook claw, 43-gasket, 44-washer, 45-nut, 5-safety pin, 51-step surface, 52-needle rod, 6-pickup and delivery tool, 61-embedded end, 62-discharge end, 7-unlocking push rod, 71-conical countersunk hole. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 4 As shown, the detachable quick locking device of the present invention is used for quick locking and unlocking between two D-SUB electrical connectors, and has a secondary locking and disassembly function, which is easy to operate, thereby achieving the purpose of improving efficiency and facilitating product maintenance. For the convenience of description, the two electrical connectors are defined as a socket 1 and a plug 2.

[0025] A detachable quick locking device includes a male locking assembly 3, a female locking assembly 4, a safety pin 5, a pick-up and delivery tool 6, and an unlocking push rod 7. The male locking assembly 3 includes an inner sleeve 31, a retaining clip 32, an outer sleeve 33, a spring 34, and a fixing clip 35; the female locking assembly 4 includes a dual-purpose screw 41, a fixing claw 42, a gasket 43, a spring washer 44, and a nut 45.

[0026] The inner sleeve 31 is a hollow cylindrical structure, with a circle of trapezoidal steps 311 in the middle of its outer circle, and the inner cavity is designed with a receiving groove 312 for accommodating the retaining clip 32 and a step surface 313 for locking. The end of the inner sleeve 31 is designed with an inner cavity cone 314 for locking guidance. The upper end of the outer sleeve 33 is designed as an inner concave arc surface 331, and the lower end is connected and fixed to the fixing clip 35 by riveting; the spring 34 is placed between the inner sleeve 31 and the outer sleeve 33. The middle of the fixing claw 42 is designed as a hollow structure, and its head is a cross-shaped split groove, and is designed with 4 claws 421 of the same size and evenly arranged on the circumference. The fixing claw 42 is installed in the center of the dual-purpose screw 41 by interference fit.

[0027] The working process of a detachable quick locking device is as follows:

[0028] The female locking assembly 4 is fixed to the socket 1 by the threaded engagement of the dual-purpose screw 41 and the nut 45 ; the male locking assembly 3 is fixed to the plug 2 by clamping the flange of the plug 2 through the elastic force of the fixing clamp 35 .

[0029] When locking, a downward axial thrust is applied to the exposed part of the inner sleeve 31. Under the action of the trapezoidal step 311, the spring 34 is compressed. During the continuous downward movement of the inner sleeve 31, the inner cavity conical surface 314 at its end contacts the hook 421 on the fixed claw 42. Under the action of the inner cavity conical surface 314, the hook 421 gathers toward the middle and passes through the step surface 313 of the inner sleeve 31. When the hook 421 passes through the step surface 313, the hook 421 resumes a vertical upward free state. After the axial thrust is released, under the action of the elastic force of the spring 34, the lower end surface of the hook 421 presses the step surface 313 to complete the quick locking. At this time, the inner sleeve 31 is almost flush with the outer sleeve 33. Whether it is in the locked state can be determined by observing the exposed height of the inner sleeve 31. In order to prevent accidental unlocking, the embedded end 61 of the picking and delivering tool 6 is used to insert the safety pin 5 into the inner sleeve 31. After the step surface 51 of the safety pin 5 passes through the claw 321 of the retaining clip 32, it is firmly fixed. The needle rod 52 of the safety pin is inserted into the center of the fixed claw 42, blocking the hook claw 421 from gathering to the middle, thereby avoiding the influence of external factors such as vibration, causing the hook claw 421 to loosen, and then causing the locking failure, thereby realizing reliable and stable quick locking and secondary locking safety functions.

[0030] When unlocking, first insert the discharging end 62 of the pick-up and delivery tool 6 into the inner sleeve 31. This operation can open the claw 321 of the retaining clip 32, thereby releasing the fixation of the claw 121 on the safety pin 5. The first unlocking is completed by taking out the safety pin 5 with the pick-up and delivery tool 6. Further, insert the unlocking push rod 7 into the inner sleeve 31 and apply a downward thrust. As the thrust increases, the conical countersunk hole 71 at the mouth of the unlocking push rod 7 can gather the hook 421 to the middle. After gathering, the hook 421 separates from the step surface 313. Under the action of the elastic force of the spring 34, the inner sleeve 31 withdraws from the dual-purpose screw 41. When the trapezoidal step 311 of the inner sleeve 31 and the concave arc surface 331 of the outer sleeve 33 contact each other, it means that the unlocking is in place. At this time, the inner sleeve 31 can be seen to protrude obviously from the outer sleeve 33. Finally, the unlocking push rod 7 is taken out to complete the whole unlocking operation.

Claims

1. A detachable quick locking device for quick locking and unlocking of a D-SUB electrical connector plug and socket, characterized in that: It includes a male locking assembly, a female locking assembly, a safety pin, a pick-up tool, and an unlocking push rod. The male locking assembly includes an inner sleeve, a retaining clip, an outer sleeve, a spring, and a fixing clip; the female locking assembly includes a dual-purpose screw, a fixing claw, a gasket, a spring washer, and a nut. The female locking assembly is installed on the socket, and the male locking assembly is installed on the plug. Locking is achieved by pressing the inner sleeve, and inserting the safety pin into the inner sleeve can avoid accidental unlocking; when unlocking, first use the pick-up tool to remove the safety pin, then insert the unlocking push rod and press to unlock.

2. A detachable quick locking device according to claim 1, characterized in that: The inner sleeve is a hollow cylindrical structure, one end of which is provided with an inner cavity cone surface, and the middle is provided with a circle of trapezoidal steps protruding outwards.

3. A detachable quick locking device according to claim 1, characterized in that: The upper end of the outer sleeve is designed as a concave arc surface, and the lower end is connected and fixed to the fixing clip by riveting.

4. A detachable quick locking device according to claim 1, characterized in that: The middle of the fixed claw is a hollow structure, the head is a cross-shaped split groove, and is provided with four hook claws of the same size and evenly arranged on the circumference.

5. A detachable quick locking device according to claim 1, characterized in that: The fixing claw and the dual-purpose screw are connected and fixed by interference fit.

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