A device for locking a ground wire head and a ground wire management locking device

Abstract

The present application provides a device for locking a ground wire head and a ground wire management locking device. The device includes: a movable component, including a telescopic pin, on the outer surface of which there is a locking groove, a first part of the locking groove extends circumferentially on the outer surface of the telescopic pin, and a second part of the locking groove extends axially on the outer surface of the telescopic pin; an automatic unlocking component, the push rod enters the first part of the locking groove under the action of the electromagnet so that the telescopic pin is in a locked state, and the push rod disengages from the first part of the locking groove under the action of the electromagnet so that the telescopic pin is in a free telescopic state; a manual unlocking component, when the automatic unlocking component is in the locked state, the rotating disk rotates to drive the telescopic pin to rotate around the axis of the telescopic pin, so that the telescopic pin is switched from the locked state to the free telescopic state. The technical solution of the present application decouples the manual unlocking from the electrolytic unlocking of the electromagnet, achieving the purpose of multiple control schemes for the ground wire head.

Description

Technical Field

[0001] This application relates to the technical field of locking mechanisms, and particularly to a device for locking a ground wire head and a ground wire management locking device. Background Art

[0002] In the field of anti-error safety systems, the ground wire management system for the storage and management of ground wire heads occupies an important part. Due to the diversity of the usage environments of ground wire heads, higher challenges are posed to the versatility and reliability of locking mechanisms, especially the locking mechanisms for ground wire heads.

[0003] Currently, the locking principle of the locking mechanisms on the market is mainly direct locking. Most of them use an electromagnet to push and pull a rod to directly lock / unlock the storage of the ground wire head. However, due to the impact force during the operation of taking and placing the ground wire head, when forced to unlock, the electromagnet will directly bear a large shear force, causing the push-pull rod and the electromagnetic components to bend or be damaged, resulting in jamming during unlocking or even inability to unlock normally.

[0004] At the same time, according to the requirements of the operating procedures, the locking mechanism needs to be equipped with an emergency unlocking function. Currently, the manual unlocking components of the ground wire locking mechanisms on the market have overly simple structures, and some even directly use through-holes as the implementation solution. This not only lacks the anti-prying function but also reduces the protection level, resulting in a significant reduction in the reliability of the entire locking mechanism (affected by dust, reptiles, and water), leading to difficulties in unlocking or even inability to unlock normally.

[0005] Improving the reliability of the unlocking structure under the premise of limited dimensions and simultaneously considering a manual unlocking component with high protection and anti-prying functions poses a higher challenge to the ground wire management locking mechanism.

[0006] The content in the background art section is only the technology known to the inventor and does not necessarily represent the prior art in this field. Summary of the Invention

[0007] This application aims to provide a device for locking a ground wire head and a ground wire management locking device, which solves the problems in the prior art that the direct locking of the electromagnet push-pull rod causes excessive impact force, resulting in damage to the push-pull rod and electromagnetic components, the manual unlocking component is too simple and lacks anti-prying and protection, and the overall unlocking reliability is not high.

[0008] According to one aspect of the present application, a device for locking a ground wire head is provided, including: a movable component, including a telescopic pin, on the outer surface of which there is a locking groove, the locking groove including a first part and a second part, the first part of the locking groove extending circumferentially on the outer surface of the telescopic pin, and the second part of the locking groove extending axially on the outer surface of the telescopic pin; an automatic unlocking component, including an electromagnet and a movable push-pull rod, the push-pull rod entering the first part of the locking groove under the action of the electromagnet to make the telescopic pin in a locked state, and the push-pull rod disengaging from the first part of the locking groove under the action of the electromagnet to make the telescopic pin in a free telescopic state; a manual unlocking component, including a rotating disk, when the automatic unlocking component is in the locked state, the rotating disk rotates to drive the telescopic pin to rotate around the axis of the telescopic pin, so that the push-pull rod moves from the first part of the locking groove to the second part, thereby switching the telescopic pin from the locked state to the free telescopic state.

[0009] According to some embodiments, the telescopic pin and the rotating disk are in gear meshing transmission.

[0010] According to some embodiments, the telescopic pin and the rotating disk are in push-rod transmission.

[0011] According to some embodiments, the front end of the telescopic pin is a spherical end face. In the locked state of the telescopic pin, the spherical end face remains fixed to lock the ground wire head. In the free telescopic state of the telescopic pin, the telescopic pin can move under the pressure at the spherical end face to unlock the ground wire head.

[0012] According to some embodiments, the movable component further includes: a return spring, which abuts against the rear end of the telescopic pin.

[0013] According to some embodiments, the device further includes a housing component, the housing component including: a housing, the housing being a hollow structure; a cover plate, the cover plate being installed at the open end of the housing to enclose the movable component, the automatic unlocking component and the manual unlocking component in the hollow structure of the housing.

[0014] According to some embodiments, the housing extends inwardly to form a sleeve, the sleeve having a telescopic cavity, the telescopic cavity accommodating the movable component, and a lock core cavity is also provided in the housing, the lock core cavity accommodating the manual unlocking component.

[0015] According to some embodiments, the telescopic pin includes a first limiting step.

[0016] According to some embodiments, the sleeve includes: a second limiting step, which cooperates with the first limiting step to limit the telescopic pin in the telescopic cavity; a sleeve opening for the telescopic pin to engage with the rotating disk; and a locking hole for the push rod to pass through the telescopic cavity and enter the locking groove.

[0017] According to some embodiments, the housing assembly further includes: a rear sealing plate connected to one end of the telescopic cavity for encapsulating the movable assembly in the telescopic cavity.

[0018] According to some embodiments, the automatic unlocking assembly further includes: an unlocking module disposed in the housing for controlling the electromagnet to drive the push rod. The electromagnet and the push rod are on the same central axis and orthogonal to the axis of the telescopic pin.

[0019] According to one aspect of the present application, a ground wire management locking device is proposed, including: the above-mentioned device, having a first groove on the housing of the device, the axis of the first groove being orthogonal to the axis of the telescopic pin; a ground wire head including an annular groove, the front end of the telescopic pin matching the annular groove, and the ground wire head being movably connected in the first groove of the housing.

[0020] Based on the above-mentioned device for locking a ground wire head and a ground wire management locking device, a dual independent unlocking scheme is used in the present application. Manual unlocking and electrolytic unlocking of the electromagnet are decoupled from each other, enabling remote control of the locking mechanism and manual operation in case of emergency, thereby achieving the purpose of multiple control schemes for the ground wire head. Moreover, the electromagnetic push-pull member does not directly participate in the locking of the ground wire head, avoiding the impact effect of the push-pull member during the locking of the ground wire head in principle. Without increasing the complexity of the unlocking mechanism and without reducing the overall protection level of the housing, the power consumption and size of the electromagnet and the sizes of other components of the unlocking mechanism can be further reduced.

[0021] To further understand the features and technical content of the present application, please refer to the following detailed description and drawings of the present application. However, this description and the drawings are only used to illustrate the present application and do not impose any limitation on the protection scope of the present application. Description of the Drawings

[0022] The following describes in detail the embodiments of the present disclosure with reference to the drawings. Here, the drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments and descriptions of the present disclosure are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0023] Figure 1 A three-dimensional structure diagram of a device for locking a ground wire head and a ground wire management locking device according to an exemplary embodiment of the present application is shown.

[0024] Figure 2 Shows an exploded view of the structure of a device for locking a ground wire head and a ground wire management locking device according to an exemplary embodiment of the present application.

[0025] Figure 3 Shows a schematic diagram of the internal structure of a device for locking a ground wire head and a ground wire management locking device in a locked state according to an exemplary embodiment of the present application Figure 1 .

[0026] Figure 4 Shows a schematic diagram of the internal structure of a device for locking a ground wire head and a ground wire management locking device in an electric unlocking state according to an exemplary embodiment of the present application Figure 2 .

[0027] Figure 5 Shows a schematic diagram of the lever structure of a device for locking a ground wire head and a ground wire management locking device according to an exemplary embodiment of the present application.

[0028] Figure 6 Shows a schematic diagram of the internal structure of a device for locking a ground wire head and a ground wire management locking device in a manual unlocking state according to an exemplary embodiment of the present application Figure 3 . Detailed implementation manners

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar parts, and thus their repetitive description will be omitted.

[0030] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of these specific details, or can be implemented in other ways, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0031] The flowcharts shown in the drawings are merely illustrative and not necessarily include all the contents and operations / steps, nor are they necessarily executed in the order described. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined, so the actual execution order may change according to the actual situation.

[0032] In the description, claims, and above-mentioned drawings of this application, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0033] Next, with reference to the drawings, a device for locking a ground wire head and a ground wire management locking device according to an embodiment of the present application will be described in detail.

[0034] Figure 1 A three-dimensional structure diagram of a device for locking a ground wire head and a ground wire management locking device according to an exemplary embodiment of the present application is shown. Figure 2 An exploded view of the structure of a device for locking a ground wire head and a ground wire management locking device according to an exemplary embodiment of the present application is shown.

[0035] As Figure 1-2 shown, according to an exemplary embodiment of the present application, the present disclosure provides a device for locking a ground wire head, including a movable component, an automatic unlocking component, and a manual unlocking component.

[0036] The movable component includes a telescopic pin 60. A locking groove 602 is provided on the outer surface of the telescopic pin 60. The locking groove 602 includes a first part and a second part. The first part of the locking groove 602 extends circumferentially on the outer surface of the telescopic pin 60, and the second part of the locking groove 602 extends axially on the outer surface of the telescopic pin 60.

[0037] The automatic unlocking component includes an electromagnet 901 and a movable push-pull rod 902. Under the action of the electromagnet 901, the push-pull rod 902 enters the first part of the locking groove 602 to make the telescopic pin 60 in a locked state. Under the action of the electromagnet 901, the push-pull rod 902 disengages from the first part of the locking groove 602 to make the telescopic pin 60 in a free telescopic state.

[0038] The manual unlocking component includes a rotating disk 70. When the automatic unlocking component is in the locked state, the rotating disk 70 rotates to drive the telescopic pin 60 to rotate around the axis of the telescopic pin 60, so that the push-pull rod 902 moves from the first part of the locking groove 602 to the second part, thereby switching the telescopic pin 60 from the locked state to the free telescopic state.

[0039] According to an embodiment of the present application, the device for locking the ground wire head further includes a housing assembly, and the housing assembly includes: a housing 10, the housing 10 is a hollow structure; a cover plate 20, the cover plate 20 is installed at the opening end of the housing 10 to enclose the movable assembly, the automatic unlocking assembly and the manual unlocking assembly in the hollow structure of the housing 10, and the entire housing 10 is encapsulated through the cover plate 20.

[0040] The housing assembly further includes: a rear sealing plate 40, connected to one end of the telescopic cavity 103, for encapsulating the movable assembly in the telescopic cavity 103.

[0041] The housing 10 extends inwardly to form a sleeve, the sleeve has a telescopic cavity 103, the movable assembly is disposed in the telescopic cavity 103, and a lock core cavity 102 is further provided in the housing 10, and the manual unlocking assembly is disposed in the lock core cavity 102.

[0042] According to an embodiment of the present application, the locking groove 602 on the telescopic pin 60 can be set as an "L"-shaped locking groove 602, and the push-pull rod 902 of the automatic unlocking assembly can enter and exit this locking groove 602 under the action of the electromagnet 901.

[0043] The front end of the telescopic pin 60 is a spherical end face 604, which matches the annular groove 301 on the ground wire head 30. In the locked state of the telescopic pin 60, the spherical end face 604 remains fixed to lock the ground wire head 30. In the free telescopic state of the telescopic pin 60, the telescopic pin 60 can move under the pressure at the spherical end face 604 to unlock the ground wire head 30.

[0044] The movable assembly further includes a return spring 50, which abuts against the rear end of the telescopic pin 60. The return spring 50 is installed in the spring installation hole 601 of the telescopic pin 60, and the rear end abuts against the rear sealing plate 40, which can make the telescopic pin 60 move axially in the telescopic cavity 103 of the housing and can automatically reset.

[0045] A first limiting step 605 is provided on the telescopic pin 60, so that after the telescopic pin 60 is installed in the telescopic cavity 103 of the housing, axial limiting is achieved.

[0046] The sleeve inside the housing includes a second limiting step, which cooperates with the first limiting step 605 to limit the telescopic pin 60 in the telescopic cavity 103. The sleeve opening 105 is used for the telescopic pin 60 to engage with the rotating disk 70. The locking hole 106 is used for the push-pull rod 902 to pass through the telescopic cavity 103 and enter the locking groove 602.

[0047] The telescopic pin 60 is installed in the telescopic cavity 103 of the shell 10, and the return spring 50 is installed in the rear end spring mounting hole 601. Under the action of the spring, the telescopic pin 60 can move axially back and forth in the telescopic cavity 103. The whole is installed in the head cavity of the shell 10, and is movable within a fixed range through the first limiting step 605 and the rear sealing plate 40. After the spherical end surface 604 of the head of the telescopic pin 60 passes through the telescopic cavity 103, it is located in the first groove 101 of the shell 10, and the ground wire head 30 is inserted into the first groove. The front end of the telescopic pin 60 matches the annular groove 301, thereby realizing the locking of the ground wire head 30.

[0048] According to an embodiment of the present application, the automatic unlocking assembly also includes an unlocking module 100, which is arranged in the shell 10 and is used to control the electromagnet 901 to drive the push-pull rod 902. The electromagnet 901 and the push-pull rod 902 are on the same central axis and are orthogonal to the axis of the telescopic pin 60.

[0049] An electromagnet mounting cavity 104 for mounting the electromagnet assembly 90 is provided on the inner side of the shell 10, including an electromagnet 901 and a push-pull rod 902. The push-pull rod 902 passes through the locking hole 106 on the shell 10 and is inserted into the locking groove 602 on the side of the telescopic pin 60. Under the action of magnetic force, the electromagnet 901 can drive the push-pull rod 902 in and out of the locking groove 602.

[0050] Figure 3 Schematic diagram of the internal structure of the device for locking the ground wire head and the ground wire management locking device in the locked state according to an exemplary embodiment of the present application Figure 1 . Figure 4 Schematic diagram of the internal structure of the device for locking the ground wire head and the ground wire management locking device in the electric unlocking state according to an exemplary embodiment of the present application Figure 2 .

[0051] like Figure 3 As shown, in the locked state, the push-pull rod 902, under the action of the spring within the electromagnet 901, passes through the locking hole 106 and inserts into the first portion of the locking groove 602 on the side of the telescopic pin 60, pressing against the telescopic pin 60 and thereby restricting the axial movement of the telescopic pin 60. At this point, the spherical end surface 604 of the telescopic pin 60 is inserted into the annular groove 301 of the grounding head. When external force is applied to extract the grounding head 300, the axial movement of the telescopic pin 60 is restricted, preventing the grounding head from being directly removed, thereby achieving the locking function.

[0052] In the locked state, the end of the push-pull rod 902 penetrates into the first part of the locking groove 602 of the telescopic pin 60 to lock the telescopic pin 60. In the unlocked state, the end of the push-pull rod 902 close to the ground wire head 30 withdraws from the first part of the locking groove 602, and the telescopic pin 60 can freely telescope along its axial direction.

[0053] Such as Figure 4As shown, during the authorized unlocking operation, the unlocking module 100 emits a signal, and the electromagnet 901 applies a magnetic force to the push rod 902, driving the push rod 902 to move in the direction away from the telescopic pin 60. The front end of the push rod 902 disengages from the locking groove 602 of the telescopic pin 60, switching the telescopic pin 60 from the locked state to the free telescopic state. At this time, when an external force extracts the ground wire head 30, based on the spherical surface effect of the spherical end face 604 at the front end of the telescopic pin, the upward movement of the ground wire head will drive the axial movement of the telescopic pin, and the telescopic pin 60 will retract axially along the telescopic cavity 103, and the ground wire head 30 can be completely pulled out, thus realizing the unlocking function. After the ground wire head 30 is pulled out, the telescopic pin 60 returns to the axially extended position under the action of the return spring 50.

[0054] According to the embodiments of the present application, the electromagnetic element does not directly participate in the locking operation, which avoids the impact effect of the push-pull member when the ground wire head 30 is locked in principle, thus avoiding the situation where the unlocking mechanism cannot move normally due to damage to the electromagnetic element, and also avoiding the jamming between the authorized unlocking pin and the unlocking shaft caused by assembly and processing errors, etc., resulting in the inability to unlock normally.

[0055] According to the embodiments of the present application, power can be transmitted between the automatic unlocking assembly and the manual unlocking assembly through gear meshing. The rotating disk 70 of the manual unlocking assembly can adopt a rotating gear, and the axis of the rotating gear is parallel to the axis of the telescopic pin 60. In the manual unlocking state, the telescopic pin 60 can rotate around its axis, so that the push rod 902 enters the second part of its locking groove 602.

[0056] Figure 5 The schematic diagram of the lever structure of the device for locking the ground wire head and the ground wire management locking device according to the exemplary embodiments of the present application is shown.

[0057] Further, referring to Figure 5 , according to the embodiments of the present application, power can also be transmitted between the automatic unlocking assembly and the manual unlocking assembly through a lever structure. On the basis of the above solution, the rotating gear is replaced with a rotating lever, and the series of tooth grooves 603 on the telescopic pin 60 are replaced with a lever 606. That is, without affecting the meshing movement, the product structure is greatly simplified, and the difficulty brought by gear processing is reduced.

[0058] On the inner side of the housing 10, there is a lock core cavity 102 for installing the manual unlocking assembly, and a lock core 80 and a rotating gear connected thereto are installed inside. The rotating gear passes through the sleeve opening 105 on the housing 10 and meshes with the series of tooth grooves 603 on the telescopic pin 60; under the rotation of the lock core 80, the telescopic pin 60 can rotate axially in the telescopic cavity 103. Similarly, the lever is driven by the same principle.

[0059] Figure 6Schematic diagram of the internal structure of the device for locking the ground wire head and the ground wire management locking device in the manually unlocked state according to an exemplary embodiment of the present application Figure 3 .

[0060] As Figure 6 shown, in the manual unlocking operation, the emergency key rotates the mechanical lock core 80, driving the rotating gear. Due to the meshing effect between the rotating gear and the series of tooth grooves 603 on the telescopic pin 60, at this time, the telescopic pin 60 can axially rotate within the telescopic cavity 103, causing the end of the push rod 902 to enter the second part of the locking groove 602 of the telescopic pin 60; at this time, the push rod 902 will lose its axial limiting effect on the telescopic pin 60 within the telescopic cavity 103. When the ground wire head 30 is extracted by an external force, it can drive the telescopic pin 60 to retract axially, and the ground wire head can be completely pulled out. Manual unlocking in an emergency is achieved.

[0061] The present application uses a dual independent unlocking scheme. The manual unlocking and the electrolytic unlocking of the electromagnet 901 are decoupled from each other, enabling remote control of the locking mechanism and manual operation in an emergency. Moreover, the manual unlocking permission is higher than the electrolytic unlocking, which better meets the on-site operation requirements, thus achieving the purpose of multiple control schemes for the ground wire head 30; at the same time, the highly integrated unlocking mechanism realizes the anti-prying function of the manual unlocking component and high protection requirements, greatly ensuring the reliability and management permission requirements. Without increasing the complexity of the unlocking mechanism and without reducing the overall protection level of the housing 10, the power consumption and size of the electromagnet 901 and the sizes of other components of the unlocking mechanism can be further reduced.

[0062] According to an aspect of the present application, a ground wire management locking device is proposed, including: the device as described above, having a first groove 101 on the housing 10 of the device, and the axis of the first groove 101 is orthogonal to the axis of the telescopic pin 60. A ground wire head 30, including an annular groove 301, the front end of the telescopic pin 60 is matched with the annular groove 301, and the ground wire head 30 is movably connected within the first groove 101 of the housing 10, and the first groove 101 restricts the ground wire head 30 to move only along its axis.

[0063] The front of the housing 10 is provided with a first groove 101, which cooperates with the annular groove 301 of the corresponding ground wire head 30. The rear end of the housing 10 is installed with a cover plate 20 to form a housing assembly.

[0064] Finally, it should be noted that: the above are only exemplary embodiments of the present disclosure and are not used to limit the present disclosure. Although the present disclosure has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A device for locking a ground wire head, characterized in that, Comprising: A movable component, including a telescopic pin, on the outer surface of which there is a locking groove, the locking groove including a first part and a second part, the first part of the locking groove extending circumferentially on the outer surface of the telescopic pin, and the second part of the locking groove extending axially on the outer surface of the telescopic pin; An automatic unlocking component, including an electromagnet and a movable push-pull rod, the push-pull rod entering the first part of the locking groove under the action of the electromagnet to make the telescopic pin in a locked state, and the push-pull rod disengaging from the first part of the locking groove under the action of the electromagnet to make the telescopic pin in a free telescopic state; A manual unlocking component, including a rotating disk. When the automatic unlocking component is in the locked state, the rotating disk rotates to drive the telescopic pin to rotate around the axis of the telescopic pin, so that the push-pull rod moves from the first part of the locking groove to the second part, thereby switching the telescopic pin from the locked state to the free telescopic state; Wherein, the front end of the telescopic pin is a spherical end face. In the locked state of the telescopic pin, the spherical end face remains fixed to lock the ground wire head. In the free telescopic state of the telescopic pin, the telescopic pin can move under the pressure at the spherical end face to unlock the ground wire head.

2. The device according to claim 1, characterized in that, There is a gear meshing transmission between the telescopic pin and the rotating disk.

3. The device according to claim 1, characterized in that, There is a push rod transmission between the telescopic pin and the rotating disk.

4. The device according to claim 1, wherein The movable component further includes: A return spring, abutted against the rear end of the telescopic pin.

5. The device according to claim 1, characterized in that, It further includes a housing component, and the housing component includes: A housing, the housing being a hollow structure; A cover plate, the cover plate being installed at the open end of the housing to enclose the movable component, the automatic unlocking component and the manual unlocking component in the hollow structure of the housing.

6. The device according to claim 5, characterized in that, The housing extends inward to form a sleeve, the sleeve having a telescopic cavity, the telescopic cavity accommodating the movable component, and a lock core cavity is also provided in the housing, and the lock core cavity accommodates the manual unlocking component.

7. The device according to claim 6, characterized in that, The telescopic pin includes a first limiting step.

8. The device according to claim 7, characterized in that, The sleeve includes: a second limiting step, cooperating with the first limiting step to limit the telescopic pin in the telescopic cavity; A sleeve opening, for the telescopic pin to mesh with the rotating disk; A locking hole, for the push-pull rod to pass through the telescopic cavity and enter the locking groove.

9. The device according to claim 6, characterized in that, The housing component further includes: A rear sealing plate, connected to one end of the telescopic cavity, for encapsulating the movable component in the telescopic cavity.

10. The device according to claim 5, wherein The automatic unlocking component further includes: An unlocking module, provided in the housing, for controlling the electromagnet to drive the push-pull rod, the electromagnet and the push-pull rod being on the same central axis and orthogonal to the axis of the telescopic pin.

11. A ground wire management locking device, characterized in that, Comprising: The device according to any one of claims 1-10, having a first groove on the housing of the device, the axis of the first groove being orthogonal to the axis of the telescopic pin; A ground wire head, including an annular groove, the front end of the telescopic pin being matched with the annular groove, and the ground wire head being movably connected in the first groove of the housing.

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