Electronic device

Abstract

The invention discloses electronic equipment, and belongs to the technical field of electronic equipment. The electronic equipment comprises a frame body, wherein the frame body is provided with a clamping part; the shell and the frame body are arranged in a stacked mode, the circumferential edge of the shell is connected with the frame body, and a light hole is formed in the shell; the decoration ring is arranged on the side, away from the frame body, of the shell, the decoration ring is provided with a clamping hook, the clamping hook extends in the direction of the frame body, and the clamping hook is connected with the clamping part in a clamped mode.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to an electronic equipment. Background Art

[0002] Electronic devices usually have a rear camera. Accordingly, a rear camera decorative ring has also become one of the elements in the electronic device. The rear camera decorative ring can be used to decorate the rear camera and also to protect the rear camera.

[0003] In related art, a rear camera decorative ring typically includes a main body and a skirt. The battery cover of the electronic device is positioned between the main body and the skirt to limit the battery cover. To ensure the stability of the decorative ring, materials such as foam are also required between the decorative ring and the electronic device's substrate, camera, and other components. However, in actual use, because the foam is typically a flexible material, there is a floating height between the decorative ring and the electronic device's housing. This means that when the decorative ring is subjected to pressure, the deformation of the foam causes relative movement between the decorative ring and the battery cover, resulting in unreliable positioning of the decorative ring. Summary of the Invention

[0004] The present application aims to provide an electronic device that can solve the technical problem of unreliable positioning between the rear camera decorative ring of the electronic device and the battery rod of the electronic device in the related art.

[0005] In a first aspect, an embodiment of the present application provides an electronic device, including:

[0006] A frame body, wherein the frame body is provided with a clamping portion;

[0007] The shell is stacked with the frame, and the circumferential edge of the shell is connected to the frame. The shell is provided with a light-transmitting hole;

[0008] The decorative ring is arranged on a side of the shell body away from the frame body. The decorative ring is provided with a hook, which extends toward the frame body and is engaged with the engaging portion.

[0009] The embodiment of the present application secures the decorative ring by providing a hook on the decorative ring and a clamping portion on the frame. Compared to the related art method of using the decorative ring body, skirt, and foam to limit the decorative ring, the embodiment of the present application directly fixes the decorative ring through the hook and clamping portion, eliminating the need for foam filling between the decorative ring and components such as the electronic device substrate and camera. This avoids the floating height of the decorative ring caused by the foam, thereby ensuring the reliability of the decorative ring's position.

[0010] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0012] Figure 1 One of the structural schematic diagrams of the electronic device according to the embodiment of the present application is shown;

[0013] Figure 2 A second structural diagram of an electronic device according to an embodiment of the present application is shown;

[0014] Figure 3 The third structural diagram of the electronic device according to the embodiment of the present application is shown.

[0015] Reference numerals:

[0016] 100 electronic device, 102 frame, 104 snap-fit portion, 106 housing, 108 light-transmitting hole, 110 decorative ring, 112 hook, 114 substrate, 116 frame, 118 camera assembly, 120 housing, 122 camera, 124 sealing ring, 126 mounting boss, 128 mounting groove, 130 raised portion, 134 mainboard, 136 electrical component, 138 shielding cover, 140 avoidance hole, 142 body, 144 through hole. DETAILED DESCRIPTION

[0017] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] The features of the terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0020] The following combination Figures 1 to 3 An electronic device according to an embodiment of the present application is described.

[0021] In some embodiments of the present application, an electronic device is provided. Figure 1 One of the structural schematic diagrams of the electronic device according to the embodiment of the present application is shown; Figure 2 A second structural diagram of an electronic device according to an embodiment of the present application is shown; Figure 3 The third structural diagram of the electronic device according to the embodiment of the present application is shown; Figure 1 、 Figure 2 and Figure 3 As shown, the electronic device 100 includes: a frame 102, the frame 102 is provided with a snap-on portion 104; a shell 106, the shell 106 is stacked with the frame 102, and the circumferential edge of the shell 106 is connected to the frame 102, and the shell 106 is provided with a light-transmitting hole 108; a decorative ring 110, the decorative ring 110 is arranged on the side of the shell 106 away from the frame 102, the decorative ring 110 is provided with a hook 112, the hook 112 extends toward the frame 102, and the hook 112 is snap-connected with the snap-on portion 104.

[0022] In the embodiment of the present application, the electronic device 100 may include a frame 102 and a housing 106, wherein the housing 106 is stacked with the frame 102, and the circumferential edge of the housing 106 is connected to the frame 102. Specifically, the circumferential edge of the housing 106 may be snap-fitted to the circumferential edge of the frame 102. It is understood that the housing 106 may generally be a battery cover of the electronic device 100, and the snap-fit connection between the frame 102 and the housing 106 may form a storage space for the electronic device 100, in which the motherboard, camera assembly, and other electrical components of the electronic device 100 may be accommodated to protect the electrical components.

[0023] Furthermore, a light hole 108 can be opened on the shell 106, and the light hole 108 can be arranged opposite to the rear camera assembly of the electronic device 100, so as to ensure that light can pass through the light hole 108 to the camera assembly, so as to ensure that the camera assembly can shoot normally.

[0024] Accordingly, electronic device 100 further includes a decorative ring 110, which can be disposed on the side of housing 106 facing away from frame 102. Specifically, decorative ring 110 can cover light-transmitting hole 108 of housing 106. The provision of decorative ring 110 not only decorates the area surrounding light-transmitting hole 108, but also ensures the aesthetics of housing 106 of electronic device 100. Furthermore, by covering light-transmitting hole 108, decorative ring 110 can also protect the camera assembly of electronic device 100, preventing damage caused by external objects striking the camera assembly through light-transmitting hole 108.

[0025] Furthermore, a snap-fitting portion 104 may be provided on the frame 102, and correspondingly, a hook 112 may be provided on the decorative ring 110 to cooperate with the snap-fitting portion 104. The snap-fitting portion 104 may be provided on the side of the frame 102 facing the housing 106, and the buckle on the housing 106 may extend from the housing 106 toward the frame 102. This ensures that when the housing 106 and the frame 102 are snap-fitted together, the hook 112 can snap-fit with the snap-fitting portion 104, thereby securing the decorative ring 110 and ensuring the stability of the connection between the decorative ring 110 and the housing 106.

[0026] It can be understood that compared with the method of limiting the decorative ring by using the decorative ring body 142, the skirt and the foam in the related art, the embodiment of the present application directly fixes the decorative ring 110 through the hook 112 and the clamping part 104, so there is no need to use foam to fill the space between the decorative ring 110 and the substrate, camera and other components of the electronic device 100, thereby avoiding the floating height of the decorative ring 110 caused by the foam. When the decorative ring 110 is under pressure, it will not move relative to the shell 106, thereby ensuring the reliability of the limitation of the decorative ring 110.

[0027] In addition, the decorative ring 110 can also be adhered to the battery cover by double-sided tape, that is, through the cooperation of the hook 112 and the clamping part 104, and through the adhesion of the double-sided tape, the decorative ring 110 can be double fixed, further improving the fixing effect between the decorative ring 110 and the shell 106.

[0028] Furthermore, it is understood that the frame 102 of the electronic device 100 also includes a mainboard, which may be equipped with multiple electrical components. In other words, the mainboard and the electrical components thereon require space between the frame 102 and the housing 106. The hook 112 on the decorative ring 110 extends from the decorative ring 110 toward the frame 102. Thus, while the decorative ring 110 is secured via the hook 112 and the engaging portion 104, the hook 112 does not occupy space between the housing 106 and the frame 102. Consequently, the installation and fixation of the decorative ring 110 does not affect the space between the frame 102 and the housing 106. This ensures that sufficient installation space is available for the mainboard and the electrical components thereon. This ensures the stability of the installation and fixation between the decorative ring 110 and the housing 106, while also ensuring that the decorative ring 110 does not interfere with the arrangement space of the mainboard and components of the electronic device 100.

[0029] The embodiment of the present application provides a hook 112 on the decorative ring 110 and a clamping portion 104 on the frame 102, thereby securing the decorative ring 110 through the clamping connection between the hook 112 and the clamping portion 104. Compared to the related art method of using the decorative ring body 142, skirt, and foam to limit the position of the decorative ring, the embodiment of the present application directly fixes the decorative ring 110 through the hook 112 and the clamping portion 104, eliminating the need to use foam to fill the gap between the decorative ring 110 and components such as the substrate and camera of the electronic device 100. This avoids the floating of the decorative ring 110 caused by the foam, thereby ensuring the reliability of the position of the decorative ring 110.

[0030] At the same time, since the hook 112 extends from the decorative ring 110 toward the frame 102, the hook 112 will not occupy the position between the shell 106 and the frame 102 on the basis of fixing the decorative ring 110 through the hook 112 and the clamping part 104, so that the installation and fixation of the decorative ring 110 will not affect the space between the frame 102 and the shell 106, which not only ensures the stability of the installation and fixation between the decorative ring 110 and the shell 106, but also ensures that the decorative ring 110 will not affect the layout space of the motherboard and components of the electronic device 100.

[0031] Exemplarily, the electronic device 100 may be a mobile phone, a tablet computer, a smart watch, etc.

[0032] In some embodiments of the present application, Figure 1As shown, the frame 102 includes: a substrate 114; a frame 116, one side of the frame 116 is snap-fitted to the circumferential edge of the shell 106, and the substrate 114 is arranged in the frame 116; wherein the hook 112 extends toward the substrate 114, and the snap-fit portion 104 is arranged on the side of the substrate 114 facing the shell 106.

[0033] In an embodiment of the present application, the frame 102 of the electronic device 100 may include a substrate 114 and a frame 116, wherein the other side of the frame 116 is snap-fitted to the circumferential edge of the shell 106. At the same time, the substrate 114 can be arranged in the frame 116, and the edge of the substrate 114 can be connected to the inner side of the frame 116. In this way, the substrate 114, the frame 116 and the shell 106 can be used to enclose a storage space to accommodate and protect other electrical components of the electronic device 100.

[0034] Further, if Figure 2 and Figure 3 As shown, the hook 112 of the decorative ring 110 can extend toward the direction of the substrate 114. Accordingly, the clamping portion 104 can be arranged on the substrate 114 and located on the side of the substrate 114 facing the shell 106, thereby ensuring that the hook 112 can be smoothly clamped with the clamping portion 104, and thus the hook 112 will not occupy the space between the shell 106 and the substrate 114, which not only ensures the stability of the installation and fixation between the decorative ring 110 and the shell 106, but also ensures that the decorative ring 110 will not affect the layout space of the mainboard and components of the electronic device 100.

[0035] In some embodiments of the present application, Figure 1 、 Figure 2 and Figure 3 As shown, the electronic device 100 also includes a camera assembly 118, which includes a housing 120 and a camera 122. The housing 120 has a through hole 144, and the camera 122 is arranged inside the housing 120. At least part of the camera 122 is arranged outside the housing 120 through the through hole 144, and at least part of the camera 122 is opposite to the light-transmitting hole 108.

[0036] In the embodiment of the present application, the electronic device 100 further includes a camera assembly 118, which may include a housing 120 and a camera 122, wherein the camera 122 is disposed within the housing 120, thereby protecting the camera 122 through the housing 120 and preventing the camera 122 from being impacted by external objects. At the same time, the housing 120 has a through hole 144, and at least a portion of the camera 122 is disposed on the outside of the housing 120 through a copper buckle on the housing 120. Specifically, the lens of the camera 122 may be disposed on the outside of the housing 120 through the through hole 144 to ensure that light can enter the lens of the camera 122 during shooting. At the same time, the light incident surface of the camera 122 extends outward, and at least a portion of the camera 122 can also be opposite to the light-transmitting hole 108 on the housing 106, so that light can pass through the light-transmitting hole 108 to the light incident surface of the camera 122, thereby ensuring that the camera assembly 118 can shoot normally.

[0037] In some embodiments of the present application, Figure 1 、 Figure 2 and Figure 3 As shown, the electronic device 100 also includes: a sealing ring 124, which is arranged along the circumference of the camera 122; wherein, the two sides of the sealing ring 124 are respectively connected to the outer shell 120 and the decorative ring 110, or the two sides of the sealing ring 124 are respectively connected to the outer shell 120 and the shell 106.

[0038] In the embodiments of this application, Figure 2 As shown, the electronic device 100 may further include a sealing ring 124, which is disposed along the circumference of the camera 122. The sealing ring 124 is connected to the housing 120 of the camera assembly 118 and the decorative ring 110 on both sides. This allows the sealing ring 124 to seal the gap between the decorative ring 110 and the housing 120 of the camera assembly 118, preventing foreign matter from entering the gap between the housing 106 and the frame 102 of the electronic device 100 and damaging the electrical components of the electronic device 100. Furthermore, the decorative ring 110 can be connected to the engaging portion 104 on the frame 102 via the hook 112 to secure the relative position of the decorative ring 110 and the housing 106. Furthermore, the decorative ring 110 can be secured to the housing 120 of the camera assembly 118 via the sealing ring 124, ensuring the stability of the position of the camera assembly 118 on the substrate 114 of the frame 102. That is, the decorative ring 110 can press the housing 120 of the camera assembly 118 onto the substrate 114 of the frame 102 through the sealing ring 124 to fix the camera assembly 118.

[0039] Or, as Figure 3As shown, the two sides of the sealing ring 124 can be connected to the housing 120 of the camera assembly 118 and the housing 106, respectively. In this way, on the one hand, the sealing ring 124 can seal the gap between the housing 106 and the housing 120 of the camera assembly 118, preventing foreign matter from entering the gap between the decorative ring 110 and the housing 120 of the camera assembly 118 and the housing 106 and the frame 102 of the electronic device 100 and causing damage to the electrical components of the electronic device 100. On the other hand, because the housing 106 and the frame 102 are connected, the housing 106 can also fix the housing 120 of the camera assembly 118 through the sealing ring 124 to ensure the stability of the position of the camera assembly 118 on the substrate 114 of the frame 102. In other words, the housing 106 can press the housing 120 of the camera assembly 118 against the substrate 114 of the frame 102 through the sealing ring 124 to fix the camera assembly 118.

[0040] It should be noted that in the relevant technology, the rear camera decorative ring usually needs to clamp the battery cover of the electronic device through the main body of the decorative ring and the skirt of the decorative ring. At this time, in order to fix the camera assembly, a separate mainboard bracket needs to be set up, and the mainboard and the frame are connected to each other to press the camera assembly 118 on the substrate of the frame. The setting of the mainboard bracket will also occupy the space on the substrate of the frame, affecting the layout space of the mainboard of the electronic device and the electrical components on the mainboard.

[0041] The embodiment of the present application directly fixes the housing 120 of the camera assembly 118 through the shell 106 or the decorative ring 110, which not only fixes the position of the camera assembly 118 but also reduces the setting of the mainboard bracket, thereby not affecting the layout space of the mainboard and components of the electronic device 100.

[0042] In some embodiments of the present application, Figure 1 、 Figure 2 and Figure 3 As shown, the electronic device 100 further includes: a mounting boss 126 , which is disposed on the substrate 114 . The mounting boss 126 extends toward the housing 106 . The mounting boss 126 encloses a mounting groove 128 . The camera assembly 118 is located in the mounting groove 128 .

[0043] In the embodiment of the present application, the electronic device 100 may further include a mounting boss 126, which is disposed on the substrate 114. The mounting boss 126 may enclose a mounting groove 128, and the camera assembly 118 may be mounted in the mounting groove 128. This allows the camera assembly 118 to be fixed against lateral movement, thereby preventing the camera assembly 118 from lateral movement.

[0044] In some embodiments of the present application, Figure 1 As shown, the clamping portion 104 is disposed on the end surface of the mounting boss 126 facing the housing 106 .

[0045] In the embodiment of the present application, the engaging portion 104 can be provided on the end surface of the mounting boss 126 facing the housing 106. This allows the engaging portion 104 to be positioned closer to the decorative ring 110, thereby effectively engaging the hook 112 of the decorative ring 110 with the engaging portion 104. Preventing the hook 112 from being too long can save material for the hook 112, simplify the manufacturing process, and ensure the overall strength of the hook 112.

[0046] In some embodiments of the present application, Figure 1 As shown, the mounting boss 126 includes a body 142 disposed on the substrate 114 ; a protrusion 130 disposed on the body 142 , and the protrusion 130 and the body 142 enclose a clamping portion 104 .

[0047] In the embodiment of the present application, the mounting boss 126 may include a body 142 and a raised portion 130, wherein the body 142 is disposed on the substrate 114, and the substrate 114 may enclose a mounting groove 128, and the camera assembly 118 may be mounted in the mounting groove 128. This can achieve the purpose of fixing the camera assembly 118 against lateral movement, thereby preventing the camera assembly 118 from lateral movement.

[0048] Furthermore, the protrusion 130 can be provided on the body 142, and the protrusion 130 and the body 142 can enclose the engaging portion 104. Specifically, one end of the protrusion 130 can be connected to the end surface of the body 142 facing the housing 106, and the other end of the protrusion 130 can extend away from the body 142 and be configured in a bent shape, thereby enclosing the engaging portion 104 between the protrusion 130 and the body 142, thereby enabling the hook 112 of the decorative ring 110 to be engaged with the engaging portion 104, thereby securing the decorative ring 110.

[0049] In some embodiments of the present application, Figure 1 As shown, the electronic device 100 further includes: a mainboard 134 , which is disposed on the substrate 114 , and the mainboard 134 is electrically connected to the camera assembly 118 .

[0050] In an embodiment of the present application, the electronic device 100 also includes a mainboard 134. The mainboard 134 can be set on the substrate 114, specifically on the side of the substrate 114 facing the shell 106, that is, the mainboard 134 is located in the accommodation space enclosed by the frame 102 and the shell 106, so that the mainboard 134 can be protected.

[0051] Furthermore, the mainboard 134 is also electrically connected to the camera assembly 118 , thereby being able to control the operation process of the camera assembly 118 and ensure the shooting function of the camera assembly 118 .

[0052] In some embodiments of the present application, Figure 1 、 Figure 2 and Figure 3 As shown, the electronic device 100 further includes: a plurality of electrical components 136 disposed on the mainboard 134 ; and a shielding cover 138 , which covers the plurality of electrical components 136 .

[0053] In the embodiment of the present application, the electronic device 100 may further include a plurality of electrical components 136, which may be disposed on the mainboard 134. That is, the mainboard 134 may be used to integrate the plurality of electrical components 136, thereby ensuring the structural integrity and miniaturization of the electronic device 100. Specifically, the electrical components 136 may be control chips, capacitors, inductors, and other logic circuits of different types and models. By disposing the plurality of electrical components 136, it is possible to control different operating modules of the electronic device 100, such as controlling the camera assembly 118 and the screen assembly of the electronic device 100, to realize different functions of the electronic device 100.

[0054] Furthermore, a shielding cover 138 can be provided on the mainboard 134. The shielding cover 138 can cover multiple electrical components 136. Through the setting of the shielding cover 138, during the operation of the electronic device 100, it is possible to shield external electromagnetic wave interference, thereby avoiding external electromagnetic waves from affecting the operation of the electrical components 136 on the mainboard 134, so as to ensure the normal operation of the electronic device 100.

[0055] Furthermore, the embodiment of the present application secures the decorative ring 110 by means of the engagement between the hook 112 and the engaging portion 104. The hook 112 does not occupy the space between the housing 106 and the frame 102, thereby ensuring that the installation and fixation of the decorative ring 110 does not affect the space between the frame 102 and the housing 106. Compared to the conventional methods for securing decorative rings, the height of the shielding cover 138 can be set higher, thereby providing more mounting space for the electrical components 136 on the mainboard 134, thereby ensuring sufficient mounting space for the electrical components 136.

[0056] In some embodiments of the present application, Figure 1 As shown, the housing 106 further defines a through hole 144 , and the hook 112 passes through the avoidance hole 140 to engage with the engaging portion 104 .

[0057] In the embodiment of the present application, a relief hole 140 may be further provided on the housing 106 of the electronic device 100 , and the hook 112 of the decorative ring 110 may pass through the relief hole 140 on the housing 106 and be engaged with the engaging portion 104 on the frame 102 .

[0058] By setting the avoidance hole 140, the hook 112 can pass through the avoidance hole 140 and be engaged with the engaging portion 104, so that the hook 112 does not need to utilize the space of the light-transmitting hole 108, thereby making the size of the light-transmitting hole 108 smaller, which not only ensures the structural strength of the shell 106, but also avoids the excessive amount of light entering the light-transmitting hole 108 from affecting the shooting effect of the camera assembly 118.

[0059] Specifically, the number of the hooks 112 can be multiple, and accordingly, the number of the avoidance holes 140 on the housing 106 can also be set to multiple, and the multiple hooks 112 and the multiple avoidance holes 140 can be set in a one-to-one correspondence.

[0060] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electronic device, characterized in that: include: A frame body, wherein the frame body is provided with a clamping portion; A shell, the shell and the frame are stacked, the circumferential edge of the shell is connected to the frame, and the shell is provided with a light-transmitting hole; The decorative ring is arranged on a side of the shell away from the frame body. The decorative ring is provided with a hook, which extends toward the frame body and is engaged with the engaging portion.

2. The electronic device according to claim 1, wherein The frame includes: substrate; a frame, one side of which is buckled and connected to the circumferential edge of the shell, and the substrate is disposed within the frame; The hook extends toward the base plate, and the engaging portion is provided on a side of the base plate facing the housing.

3. The electronic device according to claim 2, wherein: Also includes: A camera assembly includes a shell and a camera, the shell has a through hole, the camera is arranged in the shell, at least part of the camera is arranged outside the shell through the through hole, and at least part of the camera is opposite to the light-transmitting hole.

4. The electronic device according to claim 3, wherein: Also includes: A sealing ring, the sealing ring being arranged along the circumference of the camera; Wherein, two sides of the sealing ring are respectively connected to the outer shell and the decorative ring, or two sides of the sealing ring are respectively connected to the outer shell and the housing.

5. The electronic device according to claim 3, wherein: Also includes: The mounting boss is arranged on the substrate, and the mounting boss extends toward the shell. The mounting boss encloses a mounting groove, and the camera assembly is located in the mounting groove.

6. The electronic device according to claim 5, characterized in that The clamping portion is arranged on the end surface of the mounting boss facing the housing.

7. The electronic device according to claim 6, wherein: The mounting boss comprises: A body, disposed on the substrate; The protrusion is arranged on the main body, and the protrusion and the main body enclose the clamping portion.

8. The electronic device according to claim 3, wherein: Also includes: A mainboard is arranged on the substrate, and the mainboard is electrically connected to the camera assembly.

9. The electronic device according to claim 8, wherein: Also includes: A plurality of electrical components are arranged on the main board; A shielding cover is provided on the plurality of electrical components.

10. The electronic device according to any one of claims 1 to 6, characterized in that: The shell is further provided with an escape hole, and the hook passes through the escape hole and is engaged with the engaging portion.

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