A self-locking and mistaken-touch-preventing quick plug structure

Abstract

The utility model discloses a quick plug structure of self locking and mistaken touch prevention, and operation efficiency is revolutionary promotion, through the linkage mechanism of follow -up ring and spring plunger, realize and push ring insert after dial ring automatic follow -up locking, and operation step is simplified for " single -step insertion " from " insert + manual locking " of traditional structure, and efficiency promotes 70% or above, and need not manual adjustment dial ring position, especially suitable for narrow space or blind operation scene, locking reliability is greatly enhanced, mistaken touch prevention security is upgraded comprehensively, and push ring and inner ring and outer ring adopt standardization interface design, can adopt multiple specifications combination to adapt to different size different type's joint structure.

Description

Technical Field

[0001] This utility model belongs to the field of industrial and special equipment, and relates to a quick-plug structure with self-locking and anti-accidental contact. Background Technology

[0002] Traditional quick-connect mechanisms generally adopt a plug-in connection scheme between female and male connectors. Their technical implementation mainly includes:

[0003] Locking mechanism: By manually moving the dial ring on the outside of the female connector, the steel ball is driven to contract or expand radially, thereby locking and unlocking the male connector;

[0004] Elastic component: A single return spring is used to assist the dial ring in resetting;

[0005] Anti-disengagement design: It relies on the interference fit between the steel ball and the male connector groove to prevent accidental disengagement. To unlock, you need to directly move the dial to release the steel ball restraint.

[0006] However, the above solution has the following key problems in practical applications:

[0007] 1. Operation relies on manual intervention, resulting in low automation.

[0008] After the male connector is inserted, the dial ring needs to be manually adjusted to the locking position, which cannot achieve "insertion and locking", and the operation steps are cumbersome.

[0009] The dial and the male connector are not linked, resulting in low operating efficiency in confined spaces or rapid insertion / removal scenarios.

[0010] 2. Insufficient locking reliability, susceptible to vibration.

[0011] Traditional ball bearing locking relies on a single spring preload. In vibration or impact environments (such as automotive or industrial equipment scenarios), the ball bearing is prone to slight displacement due to vibration, leading to locking failure.

[0012] The locking state lacks rigid restraint, and the male connector is prone to axial movement when subjected to lateral force.

[0013] 3. Poor ability to prevent accidental touches and low security.

[0014] The unlocking ring is directly exposed to the outside and has no mechanical barrier to prevent accidental activation. It can be triggered by slight touch (such as clothing scratches or accidental collisions).

[0015] Without a locking status feedback mechanism, users cannot intuitively determine whether the lock is secure, which can easily lead to erroneous operations.

[0016] Therefore, there is an urgent need for a quick-plug structure that optimizes manual operation, has reliable locking stability, and prevents accidental contact. Utility Model Content

[0017] In order to overcome the shortcomings of the prior art, this utility model provides a quick plug-in structure with self-locking and anti-accidental contact.

[0018] To achieve the above objectives, the present invention adopts the following technical solution:

[0019] A self-locking and accidental-touch-prevention quick-plug structure includes a push ring and an inner ring and an outer ring coaxially sleeved together. An annular hole is formed between the inner ring and the outer ring for the push ring to be inserted axially. A follower ring is movably inserted into the annular hole. A lever ring is movably sleeved on the outer ring. A lever ring return spring is axially arranged between the lever ring and the outer ring. A spring plunger is radially arranged on the lever ring. The plunger head of the spring plunger passes through the outer ring and is located in the annular hole. The follower ring has a locking hole for the plunger head to pass through during extension and retraction. The follower ring is locked by the plunger head passing through at a set axial position. A steel ball is movably arranged on the outer ring. A push ring steel ball groove is provided on the outer periphery of the push ring for engaging the steel ball. When the follower ring is locked, the lever ring abuts against the steel ball to lock the push ring.

[0020] Furthermore, the outer periphery of the follower ring is provided with a sliding groove along the axial direction for the shaft end of the plunger head to abut against and move along the axis of the follower ring. One end of the sliding groove is connected to the locking hole, and the other end is connected to the shaft end of the follower ring to form a plunger head limiting groove for abutting against the periphery of the plunger head. A lifting ring is sleeved on the inner ring, and a lifting chamfer is provided on the end of the lifting ring facing the spring plunger. The plunger head moves with the follower ring in the plunger head limiting groove and abuts against the lifting chamfer at a set axial position to form a telescopic action.

[0021] Furthermore, the sliding groove and the locking hole are provided with a transition fillet for the extension and retraction of the plunger head.

[0022] Furthermore, the angle of the transition fillet is set to 25°, and the stiffness of the spring plunger is HRC40-45.

[0023] Furthermore, the outer ring is provided with a steel ball hole for accommodating the steel ball, the steel ball hole is provided radially through, and the inner circumference of the dial ring is provided with a step for abutting the steel ball.

[0024] Furthermore, a chamfer is provided on the end of the step facing the steel ball.

[0025] Furthermore, a wire snap ring is provided on the outer periphery of the outer ring, the wire snap ring abuts against one side of the shaft end of the step, and the two ends of the ring return spring abut against the other side of the shaft end of the outer ring and the step, respectively.

[0026] Furthermore, a follower ring return spring is coaxially sleeved on the outer circumference of the inner ring, with both ends of the follower ring and the inner ring respectively abutting against the follower ring and the inner ring.

[0027] Furthermore, the sidewall of the push ring ball groove is configured as a conical surface.

[0028] Furthermore, the outer ring is provided with a plunger movable groove for the spring plunger to pass through, the plunger movable groove is arranged radially and forms a set length along the axial direction of the outer ring.

[0029] In summary, the advantages of this utility model are as follows:

[0030] 1) Revolutionary improvement in operating efficiency: Through the linkage mechanism between the follow-up ring and the spring plunger, the dial ring automatically locks after the push ring is inserted. The operation steps are simplified from the traditional "insertion + manual locking" to "single-step insertion", which improves efficiency by more than 70% and eliminates the need to manually adjust the dial ring position. It is especially suitable for confined spaces or blind operation scenarios (such as wiring inside the equipment compartment).

[0031] 2) Locking reliability is greatly enhanced. The dual spring system of the derailleur return spring and the follower ring return spring, combined with the rigid limiting design of the locking hole, reduces the locking force fluctuation range from ±30% in the traditional structure to ±5%. It maintains stable locking even in high amplitude environments and has excellent vibration resistance. The contact steel ball of the derailleur step and the cone surface of the push ring steel ball groove are interference fit to lock the push ring. It can withstand high lateral shear force and avoid axial movement caused by force.

[0032] 3) The safety of preventing accidental unlocking has been comprehensively upgraded. Through the synergistic effect of the transition rounded corner and the spring plunger, the unlocking and pulling force threshold is increased, and the probability of accidental unlocking is reduced by more than 90%. When the dial ring is reset and locked, the contact and collision with the outer ring and the follower ring can also form auditory and tactile feedback, providing intuitive visual and auditory locking status indications, which helps users to make accurate judgments and avoids the safety hazards caused by visual misjudgment in traditional structures.

[0033] 4) The push ring, inner ring, and outer ring adopt a standardized interface design, which can be combined with various specifications to adapt to different sizes and types of connector structures, so as to achieve the application in industrial and special equipment fields with high reliability requirements. It is particularly suitable for aerospace connectors, quick connectors for industrial equipment, medical equipment interfaces and other scenarios. Attached Figure Description

[0034] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0035] Figure 2 This is a cross-sectional view of the process from the unlocked state to the locked state.

[0036] Figure 3 This is a cross-sectional view of the locked state.

[0037] Figure 4 This is a schematic diagram of the plunger head's movement trajectory during the self-locking process.

[0038] Figure 5 This is a schematic diagram showing the forces acting on the plunger head during the unlocking process.

[0039] Figure 6 This is a partial feature diagram of the follower ring, lifting chamfer, and plunger head.

[0040] Figure 7 This is a cross-sectional view of the follower ring and its characteristics.

[0041] Figure 8 This is a cross-sectional view of the dial and its features.

[0042] Figure 9 This is a cross-sectional view of the outer ring and its characteristics.

[0043] Figure 10 This is a cross-sectional view of the inner ring component and its features.

[0044] Figure 11 This is a cross-sectional view of the push ring and its features.

[0045] The markings in the diagram are: 101, dial ring; 101a, knurled outer surface; 101b, plunger hole; 101c, chamfered step; 101d, step; 102, outer ring; 102a, plunger moving groove; 102b, ball hole; 102c, snap ring groove; 103, spring plunger; 103a, plunger head; 104, follower ring; 104a, plunger head limiting groove; 104 b. Sliding groove; 104c. Transition fillet; 104d. Locking hole; 104e. Follower ring ball groove; 105. Inner ring assembly; 105a. Inner ring; 105b. Lifting ring; 105c. Lifting chamfer; 106. Push ring; 106a. Push ring ball groove; 107. Dial ring return spring; 108. Follower ring return spring; 109. Ball; 110. Wire retaining ring. Detailed Implementation

[0046] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0047] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0048] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0049] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0050] This embodiment provides a self-locking and accidental contact-preventing quick-plug structure, offering a novel connection method applicable to high-reliability industrial and special equipment fields. (Refer to...) Figures 1 to 3 It includes a push ring 106 and a plug-in structure consisting of an inner ring assembly 105, a follower ring 104, an outer ring 102, and a dial ring 101 for plugging into the push ring 106.

[0051] Reference Figure 10 The inner ring assembly 105 includes an inner ring 105a and a lifting ring 105b. The inner ring 105a is coaxially nested inside the outer ring 102. Preferably, the inner ring 105a and the outer ring 102 are fixedly connected by threads. After the inner ring 105a and the outer ring 102 are connected, an annular hole with a set radial width is formed between the outer periphery of the inner ring 105a and the inner periphery of the outer ring 102. The annular hole is used to set the follower ring 104 and to allow the push ring 106 to enter.

[0052] Among them, the push ring 106, inner ring 105a and outer ring 102 adopt a standardized interface design, which can be combined with various specifications to adapt to different sizes and types of connector structures, so as to achieve the application in industrial and special equipment fields with high reliability requirements. It is particularly suitable for aerospace connectors, quick connectors for industrial equipment, medical equipment interfaces and other scenarios.

[0053] The follower ring 104 and the inner ring 105a are coaxially inserted into the annular hole, and the inner and outer walls of the follower ring 104 are clearance-fitted with the annular hole, so that the follower ring 104 can move axially in the annular hole. One end of the annular hole is set as an opening for the push ring 106 to coaxially pass through. When the push ring 106 enters the annular hole, it can push the follower ring 104 axially.

[0054] The lifting ring 105b is disposed inside the annular hole and is coaxially disposed on the outer periphery of the inner ring 105a, and is threadedly connected to the inner ring 105a to form a fixed connection. A follower ring return spring 108 is disposed between the follower ring 104 and the lifting ring 105b. The two ends of the follower ring return spring 108 abut against the follower ring 104 and the lifting ring 105b respectively, so as to provide an elastic reset function for the axial movement of the follower ring 104.

[0055] The outer peripheral wall of the inner ring 105a is also provided with a shoulder for abutting against the follower ring 104 in the axial direction. The abutting direction of the shoulder against the follower ring 104 is relative to the elastic direction of the follower ring return spring 108, thereby limiting the axial range of movement of the follower ring 104 and preventing it from coming out of the annular hole.

[0056] Furthermore, refer to Figure 9 The outer ring 102 has one or more radially penetrating steel ball holes 102b on its peripheral wall. A steel ball 109 is movably disposed in the steel ball hole 102b. The outer wall of the follower ring 104 is recessed in the circumferential direction with a follower ring steel ball groove 104e. When the follower ring 104 is in a set axial position, the steel ball 109 can be embedded in the follower ring steel ball groove 104e. The outer wall of the push ring 106 is recessed in the circumferential direction with a push ring steel ball groove 106a. When the push ring 106 is in another set axial position, the steel ball 109 can be embedded in the push ring steel ball groove 106a.

[0057] The dial ring 101 is coaxially sleeved on the outer circumference of the outer ring 102 and can move axially relative to the outer ring 102, as shown in the figure. Figure 8 The outer ring 102 has a shoulder on its outer periphery, and the inner periphery of the dial ring 101 has an annular step 101d. A dial ring return spring 107 is also provided between the dial ring 101 and the outer ring 102. The two ends of the dial ring return spring 107 abut against the shoulder and the step 101d respectively, so as to provide an elastic reset function for the axial movement of the dial ring 101.

[0058] The step 101d of the dial ring 101 is located radially outside the ball hole 102b. When the dial ring 101 is in the set axial position, its step 101d will abut against the outside of the ball 109, restricting the radial position of the ball 109, thereby enabling the ball 109 to be engaged in the ball groove 104e of the follower ring to lock the follower ring 104, or engaged in the ball groove 106a of the push ring to lock the push ring 106.

[0059] A chamfer 101c is also provided on the side of step 101d facing the steel ball 109. When step 101d moves toward the steel ball 109 and comes into contact with the steel ball 109, the chamfer 101c of step 101d first contacts the steel ball 109. The chamfer 101c forms a radial inward force on the steel ball 109, so as to press the steel ball 109 radially inward more smoothly, and can provide a certain wear compensation for the steel ball 109, ensuring that the steel ball 109 can still be effectively constrained radially under long-term use.

[0060] Preferred, refer to Figure 11 The push ring steel ball groove 106a is arranged along the entire circumference of the push ring 106. When the steel ball 109 is embedded in the push ring steel ball groove 106a, the axial direction of the push ring 106 is locked, but the rotation direction is not locked, so that the push ring 106 can rotate relative to the plug-in structure, which has a certain degree of connection flexibility.

[0061] The two side walls of the push ring steel ball groove 106a along the axial direction are also set as conical surfaces, so that the steel ball 109 can enter and exit the push ring steel ball groove 106a more smoothly. When the steel ball 109 is engaged in the push ring steel ball groove 106a, the steel ball 109 and the conical surface form an interference fit, which can withstand high lateral shear force and reduce the axial movement of the push ring 106 caused by the overall structure being under stress.

[0062] Preferably, the direction and angle of the step chamfer 101c match the taper of one side of the cone surface of the push ring ball groove 106a. The step 101d locks the ball 109 into the push ring ball groove 106a in a direction that is not only radial, but can also be the direction of the step chamfer 101c with a certain offset angle from the radial direction. The step chamfer 101c locks the ball 109 in a way that is consistent with the cone surface of the push ring ball groove 106a. The variety of locking angles provides effective wear compensation capability.

[0063] Furthermore, a retaining groove 102c is provided on the outer periphery of the outer ring 102 for engaging a wire retaining spring 110. The wire retaining spring 110 abuts against the step 101d and is axially opposite to the other end of the circumferential return spring 107. The abutting direction of the wire retaining spring 110 against the step 101d is relative to the elastic direction of the circumferential return spring 107, thereby limiting the axial movement range of the circumferential ring 101 and preventing the circumferential ring 101 from disengaging from the outer ring 102.

[0064] Reference Figure 8One or more radially penetrating plunger holes 101b are provided on the peripheral wall of the dial ring 101. A spring plunger 103 is fixedly installed in the plunger hole 101b. When multiple plunger holes 101b are provided, they are evenly distributed along the circumference of the dial ring 101. A radially penetrating plunger movable groove 102a is provided on the outer ring 102, so that the spring plunger 103 passes through the plunger movable groove 102a. The plunger movable groove 102a is provided with a set length along the axial direction of the outer ring 102, so that when the dial ring 101 moves axially, the spring plunger 103 moves synchronously in the plunger movable groove 102a. The plunger head 103a of the spring plunger 103 is arranged radially inward, so that the plunger head 103a can extend into the annular hole and thus interact with the follower ring 104.

[0065] The outer periphery of the dial ring 101 is also evenly distributed with knurled outer circular surfaces 101a to increase the friction with the human hand and make it easier to operate.

[0066] Reference Figure 6 and Figure 7 The outer wall of the follower ring 104 is provided with one or more locking holes 104d for the plunger head 103a to pass through radially. When the plunger head 103a passes through the locking hole 104d, the spring plunger 103 limits the follower ring 104 axially. The outer wall of the follower ring 104 is also provided with a sliding groove 104b. The two ends of the sliding groove 104b are respectively connected to the locking hole 104d and one side of the shaft end of the follower ring 104. A plunger head limiting groove 104a is formed at the shaft end of the follower ring 104 for abutting against the peripheral wall of the plunger head 103a. During the axial movement of the follower ring 104, the sliding groove 104b is used to contact and move relative to the spherical part of the plunger head 103a.

[0067] Preferably, the diameter tolerance grade of the locking hole 104d is C11 (IT11).

[0068] In this embodiment, the two axial directions of the inner ring 105a are positive and negative, respectively, referring to... Figure 1 As shown, the positive direction is indicated by arrow a, and the negative direction is indicated by arrow b.

[0069] When the push ring 106 and the plug-in structure are in the unlocked state, refer to Figure 1 The step 101d of the dial ring 101 abuts against the steel ball 109, causing the steel ball 109 to engage in the follower ring steel ball groove 104e of the follower ring 104. The plunger head limiting groove 104a of the follower ring 104 abuts against the periphery of the plunger head 103a. During the process of connecting the push ring 106 to the plug-in structure and entering the connection locking state, the movement of the follower ring 104 and the spring plunger 103 can be referred to Figure 2 and Figure 4The push ring 106 approaches and abuts against the follower ring 104, pushing the follower ring 104 in the forward direction. At this time, the follower ring 104 pushes the entire spring plunger 103 and the shift ring 101 in the forward direction and compresses the shift ring return spring 107. At this time, the step 101d of the shift ring 101 disengages from the steel ball 109, allowing the steel ball 109 to disengage from the steel ball groove 104e of the follower ring, thereby contacting the limit on the follower ring 104, causing the follower ring 104 to move further in the forward direction. The lifting ring 105b is provided with a lifting chamfer 105c on the side facing the spring plunger 103 (i.e., the reverse side). As the spring plunger 103 moves in the forward direction, the plunger head 103a gradually approaches and abuts against the lifting chamfer 105c. The mutual interference guides the plunger head 103a to move radially outward, and then the ball of the plunger head 103a... The end of the ring 101 contacts the sliding groove 104b. Under the rebound force of the ring return spring 107, the reset movement of the ring 101 and the spring plunger 103 causes the plunger head 103a to slide onto the sliding groove 104b and slide along the sliding groove 104b to the locking hole 104d, causing the plunger head 103a to fall into the locking hole 104d. The spring plunger 103 locks the ring 101 and the follower ring 104. At this time, the shaft end of the push ring 106 has entered the annular hole, and the steel ball 109 falls into the push ring steel ball groove 106a. The reset of the ring 101 synchronously causes the step 101d to abut against the steel ball 109 again to lock the steel ball 109 in the push ring steel ball groove 106a. Thus, the push ring 106 and the plug-in structure are connected and locked, and are in the connected and locked state. (Refer to...) Figure 3 The state shown.

[0070] During the transition from the unlocked to the locked state, only the push ring 106 acts as the active component. During the insertion of the push ring 106, the dial ring 101 automatically moves and resets to lock, greatly simplifying the operation steps and reducing manual intervention. Furthermore, when the dial ring 101 resets to lock, the contact and collision between it and the outer ring 102 and the follower ring 104 can generate auditory and tactile feedback, providing intuitive visual and auditory indications of the locking status, which is beneficial for users to make accurate judgments.

[0071] The return spring 107 of the push ring and the return spring 108 of the follower ring, together with the steel ball 109 and the locking hole 104d, form a rigid limiting design for the push ring 106 and the follower ring 104, which reduces the range of locking force fluctuation from ±30% of the traditional structure to ±5%, and still maintains stable locking under high amplitude environment.

[0072] During the process of switching the push ring 106 and the plug-in structure from the locked state to the unlocked state, the active drive ring 101 first moves forward. The connection between the locking hole 104d and the sliding groove 104b is provided with a transition fillet 104c. As the ring 101 drives the spring plunger 103 to move forward, the spherical surface of the plunger head 103a contacts the transition fillet 104c, thereby pushing the plunger head 103a to retract radially outward. The force on the plunger head 103a is referenced... Figure 5 As shown, the plunger head 103a can move into the sliding groove 104b. When the plunger head 103a is in the sliding groove 104b, the locking of the spring plunger 103 to the follower ring 104 is released. At the same time, the movement of the dial ring 101 also causes the step 101d to disengage from the steel ball 109. The locking of the steel ball 109 to the push ring 106 is released. Then, the follower ring 104 moves in the opposite direction and resets under the action of the follower ring return spring 108, pushing the push ring 106 outward to form an unlocked state. After the push ring 106 is reset, the dial ring 101 is released. The dial ring 101 is pushed and reset by the dial ring return spring 107. The step 101d locks the steel ball 109 back into the follower ring steel ball groove 104e of the follower ring 104.

[0073] The preferred setting angle of the transition fillet 104c is 25°, and the stiffness of the spring plunger 103 is HRC40-45. With this angle and the stiffness setting of the spring plunger 103, when the axial displacement force of the spring plunger 103 along the axial direction of the dial ring 101 is lower than the set threshold, the transition fillet 104c will not trigger the extension and retraction of the plunger head 103a, thereby effectively avoiding accidental unlocking.

[0074] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A quick-plug structure with self-locking and anti-accidental contact features, characterized in that, The device includes a push ring and an inner ring and an outer ring coaxially connected. An annular hole is formed between the inner ring and the outer ring for the push ring to be inserted axially. A follower ring is movably inserted into the annular hole. A lever ring is movably sleeved on the outer ring. A lever ring return spring is axially provided between the lever ring and the outer ring. A spring plunger is radially provided on the lever ring. The plunger head of the spring plunger passes through the outer ring and is located in the annular hole. The follower ring has a locking hole for the plunger head to pass through during extension and retraction. The follower ring is locked by the plunger head passing through when it is in a set axial position. A steel ball is movably provided on the outer ring. A push ring steel ball groove is provided on the outer periphery of the push ring for engaging the steel ball. When the follower ring is locked, the lever ring abuts against the steel ball to lock the push ring.

2. The quick-plug structure with self-locking and anti-accidental contact as described in claim 1, characterized in that, The outer periphery of the follower ring is provided with a sliding groove along the axial direction for the shaft end of the plunger head to abut against and move along the axis of the follower ring. One end of the sliding groove is connected to the locking hole, and the other end is connected to the shaft end of the follower ring to form a plunger head limiting groove for abutting against the periphery of the plunger head. A lifting ring is sleeved on the inner ring. The lifting ring has a lifting chamfer at one end facing the spring plunger. The plunger head moves with the follower ring in the plunger head limiting groove and abuts against the lifting chamfer at a set axial position to form a telescopic action.

3. The quick-plug structure with self-locking and anti-accidental contact as described in claim 2, characterized in that, The sliding groove and the locking hole are connected by a transition fillet for the extension and retraction of the plunger head.

4. The quick-plug structure with self-locking and anti-accidental contact as described in claim 3, characterized in that, The angle of the transition fillet is set to 25°, and the stiffness of the spring plunger is HRC40-45.

5. The quick-plug structure with self-locking and anti-accidental contact as described in claim 1, characterized in that, The outer ring is provided with a steel ball hole for accommodating the steel ball, the steel ball hole is provided radially through, and the inner circumference of the dial ring is provided with a step for abutting the steel ball.

6. The quick-plug structure with self-locking and anti-accidental contact as described in claim 5, characterized in that, The step has a chamfer at the end facing the steel ball.

7. The quick-plug structure with self-locking and anti-accidental contact as described in claim 5, characterized in that, A wire snap ring is provided on the outer periphery of the outer ring, and the wire snap ring abuts against one side of the shaft end of the step. The two ends of the ring return spring abut against the other side of the shaft end of the outer ring and the step, respectively.

8. The quick-plug structure with self-locking and anti-accidental contact as described in claim 2, characterized in that, A follower ring return spring is coaxially sleeved on the outer circumference of the inner ring, with the two ends of the follower ring and the inner ring respectively abutting against the follower ring and the inner ring.

9. A quick-plug structure with self-locking and anti-accidental contact as described in claim 1 or 6, characterized in that, The sidewall of the push ring ball groove is set as a conical surface.

10. The quick-plug structure with self-locking and anti-accidental contact as described in claim 1, characterized in that, The outer ring has a plunger groove for the spring plunger to pass through. The plunger groove is radially continuous and has a set length along the axial direction of the outer ring.

Images