Camera

Abstract

The embodiment of the utility model discloses a camera, which relates to the technical field of security and protection monitoring equipment, combines a metal insert with explosion-proof plastic, and forms an explosion-proof characteristic for connection on the metal insert, so as to meet the explosion-proof requirement. The camera comprises an upper shell assembly and a lower shell assembly connected with the upper shell assembly. The upper shell assembly comprises an explosion-proof plastic shell and a metal insert embedded in the inner wall of the explosion-proof plastic shell, and the inner wall of the metal insert is provided with an internal thread; the lower shell assembly comprises a lens cover with an opening and a flange connecting piece fixedly connected to the opening of the lens cover, and external threads are arranged on the outer wall of a neck tube of the flange connecting piece; and the internal thread of the metal insert and the external thread on the flange connecting piece are matched and screwed tightly so as to seal the joint surface between the upper shell assembly and the lower shell assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of security monitoring equipment, in particular to an explosion-proof camera. Background Art

[0002] In the explosion-proof field, metals such as stainless steel and aluminum alloy are widely used due to their advantages of good corrosion resistance, high temperature resistance, pressure resistance and thermal conductivity. However, explosion-proof equipment using metals such as stainless steel and aluminum alloy generally has disadvantages such as high cost and heavy weight. In recent years, some engineering plastics have been used in explosion-proof cameras, such as the shell of explosion-proof ball cameras, because they have better advantages in quality and cost compared to metal materials.

[0003] However, some engineering plastics usually have material property problems such as poor wear resistance, high brittleness, and insufficient toughness. After directly molding to form a shell, it is difficult to directly machine explosion-proof features for joining or connecting on its body. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides an explosion-proof camera with a specific structure, which meets the explosion-proof requirements by combining a metal insert with an explosion-proof plastic and forming an explosion-proof feature for connection on the metal insert.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A camera comprises: an upper shell component and a lower shell component connected to the upper shell component;

[0007] The upper shell assembly comprises an explosion-proof plastic shell and a metal insert embedded in the inner wall of the explosion-proof plastic shell, and the inner wall of the metal insert is provided with an internal thread;

[0008] The lower shell assembly comprises: a lens cover with an opening and a flange connector fixedly connected to the opening of the lens cover, wherein an outer wall of a neck tube of the flange connector is provided with an external thread;

[0009] The internal thread of the metal insert and the external thread on the flange connector are screwed together to seal the joint surface between the upper shell component and the lower shell component.

[0010] Optionally, the metal insert is an annular structure, and at least one first annular groove is provided on the outer wall of the annular structure;

[0011] On the inner wall of the explosion-proof plastic housing, a first raised rib is provided at a position corresponding to the first annular groove and is tightly fitted therewith;

[0012] When the metal insert is embedded in the inner wall of the explosion-proof plastic housing, the first annular groove is clamped with the first raised rib.

[0013] Optionally, the metal insert is an annular structure, and at least one second raised rib is provided on the outer wall of the annular structure;

[0014] On the inner wall of the explosion-proof plastic housing, a second annular groove is provided at a position corresponding to the second raised rib and adapted to be clamped therewith;

[0015] When the metal insert is embedded in the inner wall of the explosion-proof plastic housing, the second annular groove is clamped with the second raised rib.

[0016] Optionally, the metal insert is an annular structure, and a circle of third annular grooves is provided on the upper and / or lower end surfaces of the annular structure;

[0017] An embedding groove is provided on the inner wall of the explosion-proof plastic housing, and a third raised rib corresponding to the third annular groove and tightly fitted therewith is provided on the upper and / or lower groove walls of the embedding groove and extending toward the center direction of the embedding groove;

[0018] When the metal insert is embedded in the embedding groove on the inner wall of the explosion-proof plastic housing, the third annular groove is clamped with the third raised rib.

[0019] Optionally, the metal insert is an annular structure, and a notch is provided at the edge of the upper and / or lower end surface of the annular structure.

[0020] Optionally, a supporting step surface is provided on the inner wall of the explosion-proof plastic housing and below the metal insert;

[0021] The flange connector includes a flange flat plate connected to the opening of the lens cover;

[0022] When the internal thread of the metal insert and the external thread on the flange connector are in a state of being screwed together, the supporting step surface abuts against the flange flat plate of the flange connector below.

[0023] Optionally, a sealing ring is provided between the supporting step surface and the flange flat plate of the flange connector below.

[0024] Optionally, a sealing groove is provided at the bottom of the supporting step surface and corresponding to the upper surface of the flange flat plate of the flange connector, and the sealing ring is clamped in the sealing groove.

[0025] Optionally, the explosion-proof plastic housing is an SMC explosion-proof plastic rotary cavity structure.

[0026] Optionally, it further comprises a lens assembly, wherein the lens assembly is arranged in a cavity formed by the upper shell assembly and the lower shell assembly, and the end of the lens assembly where the lens is located is arranged toward the position where the lower shell assembly is located;

[0027] A lens assembly mounting and fixing step surface is provided inside the explosion-proof plastic housing, a metal nut is embedded in the lens assembly mounting and fixing step surface, the lens assembly is fixedly connected to the lens assembly mounting and fixing step surface through a lens assembly mounting sheet metal, and is locked in the metal nut with a screw.

[0028] The camera provided by the embodiment of the utility model combines a metal insert with an explosion-proof plastic to form an upper shell component, and forms an explosion-proof feature for connection on the metal insert, thereby providing an explosion-proof camera with a specific structure, which is convenient for meeting explosion-proof requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a cross-sectional view of the structure of an embodiment of a camera of the utility model;

[0031] Figure 2 This is an exploded view of the structure of an embodiment of the camera of the utility model;

[0032] Figure 3 for Figure 1 A front view of an embodiment of a middle upper shell assembly;

[0033] Figure 4 for Figure 3 AA section view of the middle and upper shell assembly;

[0034] Figure 5 for Figure 4 A magnified view of the local structure at point B of the middle and upper shell assembly;

[0035] Figure 6 for Figure 1 A rear view of an embodiment of a middle upper shell assembly;

[0036] Figure 7 for Figure 1 Schematic diagram of the structure of an embodiment of a metal insert. DETAILED DESCRIPTION

[0037] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0038] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] The various embodiments of the present invention described below may be various examples applied to a camera or an imaging device such as a camera with an imaging function. For ease of description, they are collectively referred to as cameras herein and described using cameras as an example.

[0040] Figure 1 This is a cross-sectional view of the structure of an embodiment of the camera of the utility model. Figure 1 , an overall and general description of the camera technical concept provided by the embodiment of the utility model is given.

[0041] The camera provided by the embodiment of the utility model improves its upper shell component, combines the metal insert with the explosion-proof plastic to form the upper shell component, and forms an explosion-proof feature for connection on the metal insert, so as to meet the explosion-proof requirements.

[0042] Next, combine Figures 1 to 7 The camera provided by the embodiment of the utility model is described in detail.

[0043] The embodiment of the utility model discloses a camera, comprising: an upper shell component 10 and a lower shell component 20 connected to the upper shell component 10 .

[0044] The upper shell assembly 10 includes an explosion-proof plastic shell 11 and a metal insert 12 embedded in the inner wall of the explosion-proof plastic shell 11 . The inner wall of the metal insert 12 is provided with an internal thread for connecting with the lower shell assembly 20 .

[0045] The explosion-proof plastic housing 11 can be made of high-strength plastic material to ensure sufficient mechanical strength and chemical corrosion resistance in extreme environments to meet the application of explosion-proof cameras in various industrial environments. In some embodiments, the explosion-proof plastic housing 11 is made of SMC explosion-proof plastic, but as a composite material, it usually has material property problems such as poor wear resistance, high brittleness, and insufficient toughness. If it is directly molded, it is difficult to directly machine explosion-proof features on it. If the explosion-proof features are directly machined on it, the aforementioned material problems easily lead to explosion-proof failure, and its explosion-proof performance is difficult to meet the requirements.

[0046] In this embodiment, the main explosion-proof form of the camera is threaded explosion-proof. On the basis of the explosion-proof plastic shell 11, a metal insert 12 is embedded to form an upper shell assembly 10, and then explosion-proof threads are machined on the metal insert 12 to meet the explosion-proof requirements.

[0047] Specifically, the explosion-proof plastic housing 11 is a SMC explosion-proof plastic rotary cavity structure. By adopting the SMC explosion-proof plastic housing 11, the overall weight and cost of the camera can be reduced, and better corrosion resistance can be obtained.

[0048] In some embodiments, the explosion-proof performance of the explosion-proof plastic housing 11 is obtained by integrally molding with the metal insert 12 , so that the structural strength and explosion-proof performance of the product can be met.

[0049] See also Figure 1 and Figure 2 As shown, the lower housing assembly 20 comprises: a lens cover 21 with an opening and a flange connector 22 fixedly connected to the opening of the lens cover 21, and an external thread is provided on the outer wall of the neck tube 221 of the flange connector 22;

[0050] The internal thread of the metal insert 12 and the external thread of the flange connector 22 are screwed together to seal the joint surface between the upper shell component 10 and the lower shell component 20 to achieve explosion-proof.

[0051] In the embodiment of the utility model, the metal insert 12 is combined with the explosion-proof plastic housing 11, and an explosion-proof feature for connection is formed on the metal insert 12, so as to meet the explosion-proof requirements and improve the explosion-proof performance of the camera.

[0052] In addition, compared with metal shells, explosion-proof plastic shells have a lower density. By setting metal inserts on the inner wall of the explosion-proof plastic shell, it is equivalent to increasing the thickness of the outer shell wall in disguise, thereby improving the overall strength and pressure resistance of the upper shell assembly.

[0053] It is understandable that if the joint surface between the explosion-proof plastic housing 11 and the metal insert 12 is not tight enough, there is also the possibility of explosion transmission. Figure 5 and Figure 7 As shown, in some embodiments, the metal insert 12 is an annular structure, and at least one first annular groove 121 is provided on the outer wall of the annular structure; on the inner wall of the explosion-proof plastic shell 11, a first raised rib 111 is provided at a position corresponding to the first annular groove 121, which is tightly adapted thereto; when the metal insert 12 is embedded in the inner wall of the explosion-proof plastic shell 11, the first annular groove 121 is engaged with the first raised rib 111. In this way, by designing at least one annular groove on the outer wall of the metal insert 12 for engaging with the first raised rib 111 corresponding to the inner wall of the explosion-proof plastic shell 11, the bonding force between the joint surface of the explosion-proof plastic shell 11 and the metal insert 12 can be enhanced, and the explosion-proof effect of the explosion-proof surface of the camera can be further enhanced.

[0054] Specifically, two first annular grooves 121 are arranged on the outer wall of the annular structure in the annular direction, and the two first annular grooves 121 are arranged at intervals in the axial direction.

[0055] In other embodiments, the metal insert 12 is an annular structure, and at least one second raised rib is provided on the outer wall of the annular structure; on the inner wall of the explosion-proof plastic shell 11, a second annular groove that is clamped and adapted to the second raised rib is provided at a position corresponding to the second raised rib; when the metal insert 12 is embedded in the inner wall of the explosion-proof plastic shell 11, the second annular groove is clamped with the second raised rib.

[0056] Similar to the technical concept of the aforementioned embodiment, in this embodiment, by designing at least one raised rib on the outer wall of the metal insert 12 for clamping with the second annular groove corresponding to the inner wall of the explosion-proof plastic shell 11, it can also enhance the bonding force between the joint surface of the explosion-proof plastic shell 11 and the metal insert 12, thereby further enhancing the explosion-proof effect of the camera explosion-proof surface.

[0057] In addition, in the above two embodiments, by providing at least one groove or raised rib on the outer wall of the metal insert 12, the length of the explosion transmission path can be further increased, thereby improving the explosion-proof performance of the camera.

[0058] It is understandable that the joint surface between any two parts may have the potential for explosion transmission, so continue to refer to Figure 5 and Figure 7 In some embodiments, the metal insert 12 is an annular structure, and a circle of third annular grooves 122 are provided on the upper and / or lower end surfaces of the annular structure; an embedding groove is provided on the inner wall of the explosion-proof plastic shell 11 (the position where the metal insert is provided in the figure), and a third raised rib 113 corresponding to the third annular groove 122 and tightly adapted to the embedding groove is provided on the upper and / or lower groove walls of the embedding groove, extending toward the center direction of the embedding groove; when the metal insert 12 is embedded in the embedding groove on the inner wall of the explosion-proof plastic shell 11, the third annular groove 122 is clamped with the third raised rib 113.

[0059] In order to prevent the metal insert 12 from loosening its connection with the explosion-proof shell due to the influence of tangential torsional force when the internal and external threads rotate and twist, in some embodiments, the metal insert 12 is an annular structure, and a notch 123 is provided at the edge of the upper and / or lower end surface of the annular structure. The notch 123 can be arranged along the edge of the upper and / or lower end surface of the annular structure. For example, one is arranged every 90 arcs, and four are arranged on the upper and lower end surfaces respectively; positioning protrusions 114 are provided on the upper and lower groove walls of the embedding groove corresponding to the inner wall of the explosion-proof shell to further improve the tangential torsional resistance of the metal insert 12, thereby improving the explosion-proof effect of the explosion-proof surface.

[0060] As mentioned above, any joint surface may cause explosion hazards, so continue to refer to Figure 1 and Figure 5 In some embodiments, a supporting step surface is provided on the inner wall of the explosion-proof plastic shell 11 and below the metal insert 12; the flange connector 22 includes a flange flat plate 222 connected to the opening of the lens cover 21; when the internal thread of the metal insert 12 and the external thread on the flange connector 22 are tightened together, the supporting step surface abuts against the flange flat plate 222 of the flange connector 22 below.

[0061] In this embodiment, the supporting step surface abuts against the flange flat plate 222 of the flange connector 22 below, so that the two are more closely joined, thereby improving the explosion-proof performance at the joint surface.

[0062] Furthermore, a sealing ring 223 is provided between the supporting step surface and the flange flat plate 222 of the flange connector 22 below, which can further improve the explosion-proof performance of the camera.

[0063] Specifically, a sealing groove is provided at the bottom of the supporting step surface and at the upper surface of the flange flat plate 222 of the flange connector 22 , and the sealing ring 223 is clamped in the sealing groove.

[0064] Continue to view Figure 1 and Figure 2 In some embodiments, a lens assembly 30 is further included, wherein the lens assembly 30 is disposed in a cavity formed by the upper shell assembly 10 and the lower shell assembly 20, and the end of the lens of the lens assembly 30 is disposed toward the position of the lower shell assembly 20;

[0065] The interior of the explosion-proof plastic housing 11 is provided with a lens assembly 30 mounting and fixing step surface 115, in which a metal nut 116 is embedded. The lens assembly 30 is fixedly connected to the lens assembly 30 mounting and fixing step surface 115 through a lens assembly mounting sheet metal 40, and is locked in the metal nut 116 with a screw.

[0066] The metal nut 116 can be a copper nut, and the lens assembly 30 can be locked by embedding the copper nut to meet the camera installation and fixation requirements. The top of the explosion-proof plastic shell 11 also has a threaded hole 117 for locking; a metal nut 118 is provided on the lower side wall at a position corresponding to the flange connector to further lock and fix the upper shell assembly and the lower shell assembly.

[0067] The camera provided in the embodiment of the utility model combines the metal insert 12 with the explosion-proof plastic and forms an explosion-proof feature for connection on the metal insert 12, thereby providing an explosion-proof camera with a specific structure that is convenient for meeting the explosion-proof requirements.

[0068] Furthermore, the main body of the upper shell component 10 of the camera body is made of SMC explosion-proof plastic, which can effectively reduce the overall weight and cost of the camera and improve corrosion resistance.

[0069] The grooves and annular grooves provided on the surface of the metal insert 12 can not only improve the bonding strength between the explosion-proof plastic and the bonding surface of the metal insert 12, thereby improving the explosion-proof performance of the camera, but also further reduce the weight of the entire device.

[0070] In summary, the camera using the technical solution of the embodiment of the utility model has a compact structure, has advantages in cost and weight, can meet the requirements of explosion-proof and sealing performance, and is convenient for product maintenance and function expansion.

[0071] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0072] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A camera, characterized in that: include: An upper shell assembly and a lower shell assembly connected to the upper shell assembly; The upper shell assembly comprises an explosion-proof plastic shell and a metal insert embedded in the inner wall of the explosion-proof plastic shell, and the inner wall of the metal insert is provided with an internal thread; The lower shell assembly comprises: a lens cover with an opening and a flange connector fixedly connected to the opening of the lens cover, wherein an outer wall of a neck tube of the flange connector is provided with an external thread; The internal thread of the metal insert and the external thread on the flange connector are screwed together to seal the joint surface between the upper shell component and the lower shell component.

2. The camera according to claim 1, characterized in that The metal insert is an annular structure, and at least one first annular groove is provided on the outer wall of the annular structure; On the inner wall of the explosion-proof plastic housing, a first raised rib is provided at a position corresponding to the first annular groove and is tightly fitted therewith; When the metal insert is embedded in the inner wall of the explosion-proof plastic housing, the first annular groove is clamped with the first raised rib.

3. The camera according to claim 1, characterized in that The metal insert is an annular structure, and at least one second raised rib is provided on the outer wall of the annular structure; On the inner wall of the explosion-proof plastic housing, a second annular groove is provided at a position corresponding to the second raised rib and adapted to be clamped therewith; When the metal insert is embedded in the inner wall of the explosion-proof plastic housing, the second annular groove is clamped with the second raised rib.

4. The camera according to claim 1, characterized in that The metal insert is an annular structure, and a circle of third annular grooves is provided on the upper and / or lower end surfaces of the annular structure; An embedding groove is provided on the inner wall of the explosion-proof plastic housing, and a third raised rib corresponding to the third annular groove and tightly fitted therewith is provided on the upper and / or lower groove walls of the embedding groove and extending toward the center direction of the embedding groove; When the metal insert is embedded in the embedding groove on the inner wall of the explosion-proof plastic housing, the third annular groove is clamped with the third raised rib.

5. The camera according to claim 1, characterized in that The metal insert is an annular structure, and a notch is arranged at the edge of the upper and / or lower end surface of the annular structure.

6. The camera according to claim 1, characterized in that A supporting step surface is provided on the inner wall of the explosion-proof plastic housing and below the metal insert; The flange connector includes a flange flat plate connected to the opening of the lens cover; When the internal thread of the metal insert and the external thread on the flange connector are in a state of being screwed together, the supporting step surface abuts against the flange flat plate of the flange connector below.

7. The camera according to claim 6, characterized in that A sealing ring is provided between the supporting step surface and the flange flat plate of the flange connector below.

8. The camera according to claim 7, characterized in that The bottom of the supporting step surface and the upper surface of the flange flat plate of the flange connector are provided with sealing grooves correspondingly, and the sealing ring is clamped in the sealing grooves.

9. The camera according to claim 1, characterized in that: The explosion-proof plastic shell is an SMC explosion-proof plastic rotary cavity structure.

10. The camera according to claim 1, characterized in that It also includes a lens assembly, which is arranged in the cavity formed by the upper shell assembly and the lower shell assembly, and the end of the lens assembly where the lens is located is arranged toward the position where the lower shell assembly is located; A lens assembly mounting and fixing step surface is provided inside the explosion-proof plastic housing, a metal nut is embedded in the lens assembly mounting and fixing step surface, the lens assembly is fixedly connected to the lens assembly mounting and fixing step surface through a lens assembly mounting sheet metal, and is locked in the metal nut with a screw.

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