An explosion-proof charger

Abstract

The application provides an explosion-proof charger, a silica gel sleeve with insulation and elasticity is covered on the surface of a charging interface, the silica gel sleeve protrudes first and second convex rings around a first fixing member, so that the spring needle of the charging interface of the charger and the corresponding detection feet of an electronic device are accurately connected, a charging switch for controlling the electrification of the charging interface is also adopted, a second circuit board of the charging switch is electrically connected to a first circuit board of the charging interface, a pressing member protruding from a base body is pressed, and the pressing member abuts against a contact point of the second circuit board to electrify the charging interface. The explosion-proof charger provided by the application can avoid carrying static electricity or generating instantaneous large current when the electronic device is charged, and can be applied to production operation sites with explosion-proof requirements.

Description

Technical Field

[0001] This invention belongs to the field of electronic devices, and particularly relates to an explosion-proof charger. Background Technology

[0002] Chargers are essential electronic device accessories in daily life. With the continuous development of electronic information technology, portable electronic devices are also widely used in factories or various construction sites, such as large-scale operations like petrochemicals, tunnel construction, and mining. Most factories and construction sites have harsh environments with large amounts of flammable and explosive gases. If a large current is generated during charging or if static electricity is carried, it can pose a significant safety hazard to the production and operation site. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an explosion-proof charger, which aims to solve the safety hazards caused by static electricity or instantaneous large current generated by electronic devices during charging.

[0004] To solve the above-mentioned technical problems, the present invention is implemented as follows: an explosion-proof charger, comprising: a base; a charging interface fixed to the base, the charging interface comprising the base, a first fixing member, a plurality of spring pins and a first circuit board; The first fastener includes a base portion fixed to the base and an insertion portion protruding from the base. The surface of the first fastener is covered with a silicone sleeve. The silicone sleeve has a first protruding ring protruding around the insertion portion, and the silicone sleeve has a second protruding ring protruding around the edge of the base portion and in a direction away from the base portion. The first circuit board is fixed to the base and located on the side of the seat portion away from the plug portion. One end of the spring pin is fixed to the first fixing member and protrudes from the first fixing member in a direction away from the seat portion. The other end of the spring pin is connected to the first circuit board. A charging switch is movably connected to the base. The charging switch includes a second circuit board electrically connected to the first circuit board and a pressing member movably connected to the second circuit board. The pressing member is used to move linearly relative to the second circuit board and abut against the contact point of the second circuit board to energize the charging interface. The base is provided with a through hole for the pressing member to pass through along the linear movement direction of the pressing member.

[0005] Furthermore, the base has a mounting hole that matches the seat portion, the inner wall of the mounting hole is provided with a mounting ring groove, and the silicone sleeve has a third protruding ring that matches the mounting ring groove around the seat portion.

[0006] Furthermore, the first fixing member extends from the plug-in portion toward the circuit board and is formed with a plurality of sleeves, one end of each sleeve protruding from the plug-in portion, and the silicone sleeve having a plurality of fixing holes corresponding to the plurality of sleeves, and the spring pin being tightly connected inside the sleeve.

[0007] Furthermore, the spring pin includes a fixed cylinder coaxially arranged and a PIN pin retractably disposed at one end of the fixed cylinder; the outer wall of the fixed cylinder is interference-fitted into the sleeve, and the PIN pin is retractably connected to the end of the sleeve away from the circuit board.

[0008] Furthermore, the spring pin also includes a first connecting post and a second connecting post coaxially connected to the fixed cylinder in sequence. The first connecting post abuts between the circuit board and the fixed cylinder; the second connecting post passes through the circuit board.

[0009] Preferably, the first fastener is made of hard plastic.

[0010] Furthermore, the charging interface also includes a dustproof component rotatably connected to the base, the dustproof component including a dustproof cover tightly fitted to the outside of the silicone sleeve, the dustproof cover being provided with a sealing groove matching the first protruding ring.

[0011] Furthermore, the substrate and the dustproof component are provided with a dustproof cover groove that matches the dustproof cover; The dustproof assembly also includes a cover shaft rotatably connected to the base. One end of the cover shaft is connected to the dustproof cover, and the cover shaft passes through the end of the dustproof cover groove near the first fixing member. A limiting protrusion is provided at the end of the cover shaft away from the dustproof cover, and the limiting protrusion is used to limit the movement of the cover shaft toward the base.

[0012] Furthermore, the charging interface also includes a second fixing member fixed to the side of the circuit board away from the first fixing member. The second fixing member is provided with a sealing groove with an opening facing the circuit board, and the projection of the spring pin onto the second fixing member is located within the sealing groove.

[0013] Furthermore, a sealing gasket is provided between the sealing groove and the circuit board.

[0014] Furthermore, the explosion-proof charger also includes a transmission clamping mechanism, which comprises: A transmission component is rotatably connected to the base body, and the transmission component includes a main shaft and an eccentric shaft eccentrically disposed on the main shaft; A movable component is movably connected to the base. The movable component is provided with a transmission hole, and the eccentric shaft passes through the transmission hole. The movable component is used to move linearly with the rotation of the transmission component. The charging switch is fixed to the movable component, and the linear movement direction of the pressing member is the same as the linear movement direction of the movable component. A first elastic element is connected between the base and the moving component, and the first elastic element is used to provide a force to prevent the moving component from moving linearly; A triggering component is connected to the transmission component, and the triggering component is used to drive the transmission component to rotate clockwise around the main shaft.

[0015] Furthermore, the moving component includes a transmission member, and one end of the transmission member relative to the first elastic member is provided with a pressing protrusion, the pressing protrusion passing through the through hole and protruding out of the receiving cavity.

[0016] Furthermore, the sidewall of the transmission hole protrudes with a stepped portion that matches the eccentric shaft. The stepped portion includes a plane and a transition surface that connects the plane to the adjacent inner wall of the transmission hole. The plane extends away from the first elastic element and is perpendicular to the inner wall of the transmission hole. The cross-section of the transition surface perpendicular to the axis of rotation of the transmission component is arc-shaped.

[0017] Furthermore, the outer contour of the cross-section of the eccentric shaft perpendicular to its axial direction is a closed ring with smooth edges, and the widest width direction of the cross-section is perpendicular to the radial direction of the main shaft.

[0018] Furthermore, the transmission pressing mechanism also includes a limiting and rebounding component, which further includes a first limiting structure fixed to the base, a second limiting structure fixed to the transmission component, and a second elastic element whose two ends are respectively connected to the first limiting structure and the second limiting structure; The second limiting structure is rotatably connected to the first limiting structure in a clockwise direction with the main shaft as the axis. The first limiting structure is provided with a plurality of limiting grooves whose width gradually decreases in a clockwise direction around the main shaft. The second limiting structure is provided with a plurality of sliders that match each of the limiting grooves. The sliders are elastic, and the width of the sliders in the radial direction of the main shaft is greater than the minimum width of the limiting grooves. The second elastic element is used to provide the second limiting mechanism with an axial force in another clockwise direction about the main shaft.

[0019] Furthermore, the multiple limiting slides are connected end to end to form a closed loop, and a limiting wall is formed at the connection between two adjacent limiting slides. The included angle A between the limiting wall and the side wall of the limiting slide is greater than 90° and less than 150°.

[0020] Furthermore, the transmission pressing mechanism also includes a limiting member rotatably connected to the base. The limiting member has a limiting groove that matches the eccentric shaft. One end of the eccentric shaft passes through the limiting groove, and the circumference of the eccentric shaft abuts against the inner wall of the limiting groove.

[0021] The limiting component includes a fixed cylinder, a movable part rotatably connected to the fixed cylinder, and a key that engages with the movable part; The base has a mounting hole that matches the fixing cylinder, and the fixing cylinder passes through the mounting hole and is fixed to the base; The movable part includes a fixed column and a limiting block spaced apart from the fixed column. The fixed column passes through the fixed cylinder and rotates coaxially with the fixed cylinder. The limiting block is provided with the limiting groove. The key is used to rotate the movable part about the fixed cylinder axis.

[0022] Compared with the prior art, the explosion-proof charger of this invention has the following advantages: An explosion-proof charger uses a charging switch in conjunction with a charging interface to charge electronic devices. On one hand, the surface of the charging interface is covered with a silicone sleeve, and the silicone sleeve protrudes around a first fixing member with a first convex ring and a second convex ring. The first convex ring and the second convex ring have insulation and elasticity. When the charging port of the electronic device is plugged in, the spring pin of the charger's charging interface is accurately aligned with the corresponding detection pin of the electronic device. It also prevents the surface of the charging interface from carrying static electricity, thus playing a role in explosion protection.

[0023] On the other hand, the explosion-proof charger of the present invention also employs a charging switch for controlling the power supply to the charging interface. The second circuit board of the charging switch is electrically connected to the first circuit board of the charging interface. Pressing the pressing member protruding from the base causes the pressing member to abut against the contact point of the second circuit board, thereby energizing the charging interface. Compared to related technologies where electronic devices are instantly charged upon connection to the charging interface, the explosion-proof charger of the present invention can actively control the power supply to the charging interface after the electronic device is connected. It ensures that the charger and electronic device are accurately connected before current is supplied, avoiding the generation of a large instantaneous current during charging and thus achieving an explosion-proof effect. Attached Figure Description

[0024] Figure 1 This is a first-view exploded view of the overall structure of the charging interface in an embodiment of the present invention; Figure 2 This is a second-view exploded view of the overall structure of the charging interface in an embodiment of the present invention; Figure 3 This is an exploded view of a portion of the charging interface structure in an embodiment of the present invention; Figure 4 This is a partial structural cross-sectional view of the charging interface in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the dustproof component in an embodiment of the present invention; Figure 6 This is an exploded view of the overall structure of the charger in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the charger in an embodiment of the present invention; Figure 8 yes Figure 7 A magnified view of detail B in the middle; Figure 9 This is a rear view of the moving component in an embodiment of the present invention; Figure 10 This is a rear view of the transmission component in an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the moving component in an embodiment of the present invention; Figure 12 This is a partial structural schematic diagram of the transmission pressing mechanism in an embodiment of the present invention; Figure 13 This is a rear view of the first limiting structure in an embodiment of the present invention; Figure 14 yes Figure 13 Enlarged view of detail C in the middle; Figure 15 This is a front view of the second limiting structure in an embodiment of the present invention; Figure 16 This is a rear view of the front shell in an embodiment of the present invention; Figure 17 yes Figure 16 Enlarged view of detail D; Figure 18 These are exploded views of some structures in embodiments of the present invention; Figure 19 This is a schematic diagram of the transmission component structure in an embodiment of the present invention; Figure 20 This is a rear view of the handle in an embodiment of the present invention.

[0025] Figure 21 This is a cross-sectional view of the charging interface in an embodiment of the present invention; Figure 22 yes Figure 21 A magnified view of detail E.

[0026] In the accompanying drawings, the reference numerals denote: 10, moving part; 110, transmission component; 111, transmission hole; 1111, stepped portion; 1111a, plane; 1111b, transition surface; 112, clamping protrusion; 120, assembly; 121, first assembly arm; 122, second assembly arm; 123, third assembly arm; 124, insulating bracket; 1241, extension frame; 125, wiring hole; 20. Transmission component; 210. Main shaft; 2211. Fixing block; 220. Eccentric shaft; 221. First semicircular portion; 222. Second semicircular portion; 223. Limiting portion; 230. Fixing plate; 30. Triggering component; 310. Handle; 311. Fixing groove; 320. Washer; 40. Base; 410. Top cover; 411. Positioning arm; 420. Front shell; 421. Through hole; 422. Limiting plate; 423. Protrusion; 4231. Dust cover groove; 424. Enclosing part; 430. Rear shell; 431. Assembly hole; 50. Charging switch; 510. Housing; 520. Second circuit board; 530. Pressing component; 60. First elastic element; 70. Limiting component; 710. Fixing part; 711. First fixing cylinder; 712. Fixing nut; 713. Second fixing cylinder; 714. Fixing pin; 720. Movable part; 721. Fixing post; 7211. First fixing post; 7212. Second fixing post; 7213. Third fixing post; 722. Positioning post; 723. Connecting arm; 724. Limiting block; 7241. Limiting groove; 730. Key; 80. Limiting and rebounding component; 810. First limiting structure; 811. Limiting groove; 8111. Limiting wall; 820. Second limiting structure; 821. Slider; 8211. Limiting surface; 830. Second elastic element; 90. Charging interface; 910. First fixing member; 911. Base body; 912. Insertion part; 9121. Sleeve; 913. Silicone sleeve; 9131. First convex ring; 9132. Second convex ring; 9133. Third convex ring; 9134. Fixing hole; 914. Receiving cavity; 920. Spring pin; 921. Fixing cylinder; 922. PIN pin; 923. First connecting post; 924. Second connecting post; 930. First circuit board; 940. Dustproof assembly; 941. Dustproof cover; 9411. Sealing groove; 942. Cover pivot; 9421. Limiting protrusion; 9422. Pivot part; 9423. Connecting part; 943. Fixing plug; 950. Second fixing member; 951. Sealing groove; 952. Sealing gasket; 953. Assembly post. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] Example: In this embodiment, please refer to Figures 1-22An explosion-proof charger includes: a base 40; The charging interface 90 is fixed to the base 40. The charging interface 90 includes the base 40, a first fixing member 910, a plurality of spring pins 920 and a first circuit board 930. The first fastener 910 includes a seat portion 911 fixed to the base 40 and a plug portion 912 protruding from the base 40. The surface of the first fastener 910 is covered with a silicone sleeve 913. The silicone sleeve 913 has a first protruding ring 9131 protruding around the plug portion 912, and the silicone sleeve 913 has a second protruding ring 9132 protruding around the edge of the seat portion 911 and in a direction away from the seat portion 911. The first circuit board 930 is fixed to the base 40 and located on the side of the seat 911 away from the insertion part 912. One end of the spring pin 920 is fixed to the first fixing member 910 and protrudes from the first fixing member 910 in the direction away from the seat 911. The other end of the spring pin 920 is connected to the first circuit board 930. A charging switch 50 is movably connected to a base 40. The charging switch 50 includes a second circuit board 520 electrically connected to a first circuit board 930 and a pressing member 530 movably connected to the second circuit board 520. The pressing member 530 is used to move linearly relative to the second circuit board 520 and abut against the contact point of the second circuit board 520 to energize the charging interface 90. The base 40 is provided with a through hole 421 through which the pressing member 530 passes along the linear movement direction of the pressing member 530.

[0029] Specifically, in this embodiment, such as Figures 1-2 As shown, the base 40 includes a front shell 420 and a rear shell 430 that are spaced apart and connected at their edges. The front shell 420 of the base 40 protrudes at one end away from the rear shell 430 to form a protrusion 423. The front shell 420 also includes a surrounding portion 424 that is close to the rear shell 430 and connected to the protrusion 423. The protrusion 423 and the surrounding portion 424 surround to form a receiving cavity with a bottom opening. The receiving cavity is used to accommodate a first fixing member 910, a plurality of spring pins 920 and a circuit board. The first fixing member 910 is partially accommodated in the receiving cavity. The insertion portion 912 of the first fixing member 910 protrudes from the receiving cavity away from the opening of the receiving cavity. The seat portion 911 of the first fixing member 910 is accommodated in the receiving cavity. The circuit board is accommodated in the receiving cavity.

[0030] The first fixing member 910 and the circuit board enclose a first receiving cavity 914. The projection of the plug portion 912 toward the base portion 911 is located inside the base portion 911. The plug portion 912 is used to match the charging port of the electronic device. The first fixing member 910 is covered with an integrally molded silicone sleeve 913 around its entire body and toward the detection pin of the electronic device. Ten spring pins 920 are arranged in two evenly spaced rows on the first fixing member 910 and partially housed in the first receiving cavity 914. The spring pins 920 are arranged perpendicular to the circuit board along the axial direction. The retractable pins 922 of the spring pins 920 protrude from the plug portion 912, and the top surface of the plug portion 912 protruding from the spring pins 920 is parallel to the circuit board.

[0031] One end of the electronic device has an inwardly recessed interface that matches the first fixing member 910. The interface has a centrally located annular insertion wall protruding towards its opening, forming a connection area. The connection area contains an array of detection pins that match the spring pins 920. When the first fixing member 910 is inserted into the interface, the base 911 is in close contact with the inner wall of the interface, and the insertion part 912 is in close contact with the inner wall of the annular insertion wall. Each spring pin 920 abuts against its corresponding detection pin. The surface of the insertion part 912 away from the base 911 is separated from the bottom of the interface by a distance equal to the extension and retraction of the spring pin 920. As an example, two detection pins EN in the electronic device are connected to two corresponding spring pins 920 in the charging interface 90. The signal is transmitted to a circuit board connected to the other end of the spring pins 920, and the circuit board controls the electronic device to connect to a charging power source.

[0032] The charging switch 50 includes a housing 510, a second circuit board 520 fixed to the housing 510, and a pressing member 530 movably connected to the housing 510 along the linear movement direction of the moving member 10. The pressing member 530 protrudes from the base 40 and has an opening corresponding to the projection of the charging switch 50 in the linear movement direction. The circuit board has a contact point on the side facing the pressing member 530. The pressing member 530 is used to move upward to abut against the contact point to connect the charger circuit.

[0033] First, the first protruding ring 9131 is used to achieve waterproofing in one direction between the charging interface 90 and the detection pin of the electronic device, and the second protruding ring 9132 is used to achieve waterproofing in the other direction between the charging interface 90 and the detection pin of the electronic device. The first protruding ring 9131 and the second protruding ring 9132 form a sealed space between the charging port of the electronic device and the charging interface 90. During the charging process, the spring pin 920 is housed in the sealed space to prevent external liquids and dust from adhering to the spring pin 920 and the detection pin, thereby reducing poor contact and circuit failure caused by the environment. This provides a charging interface 90 that is suitable for complex industrial production environments and further plays an explosion-proof role.

[0034] Secondly, the first protruding ring 9131 and the second protruding ring 9132 define the direction of insertion of the charging port of the electronic device, so that the spring pin 920 can accurately align with the detection pin, avoiding the generation of electrical sparks due to poor contact between the spring pin 920 and the detection pin.

[0035] Furthermore, the first protruding ring 9131 and the second protruding ring 9132 are made of silicone, which has a certain degree of elasticity. They can be inserted into the charging port of the electronic device with an interference fit and generate friction between them, thereby slowing down the connection speed between the electronic device and the charging interface 90, preventing static electricity and electrical sparks generated by rapid insertion, and thus playing a role in explosion protection.

[0036] Finally, the charging port 90 must be powered by the charging switch 50 to ensure that the charger and electronic device are accurately connected before current is supplied, thus avoiding a large instantaneous current during charging and providing explosion protection.

[0037] Furthermore, the base 40 has a mounting hole that matches the seat 911, the inner wall of the mounting hole is provided with a mounting ring groove, and the silicone sleeve 913 has a third protruding ring 9133 that matches the mounting ring groove protruding around the seat 911.

[0038] Specifically, such as Figures 1-5 As shown in Figures 21 and 22, in this embodiment, the annular surface of the seat portion 911 of the first fixing member 910 facing the insertion portion 912 is flush with the top surface of the front shell 420 of the base 40. The top surface of the front shell 420 is provided with a mounting hole that matches the seat portion 911. The third protruding ring 9133 can be tightly connected to the mounting ring groove, so that the base 40 and the first fixing member 910 are sealed, preventing water and dust from entering the base 40 through the gap between the base 40 and the first fixing member 910. This can protect the first circuit board 930 of the charging interface 90, and no impurities will interfere with the first circuit board 930 during the charging process, thus playing the role of explosion protection and circuit protection.

[0039] Furthermore, the first fixing member 910 extends from the insertion part 912 toward the first circuit board 930 and forms a plurality of sleeves 9121. One end of the sleeve 9121 protrudes from the insertion part 912. The silicone sleeve 913 has a plurality of fixing holes 9134 corresponding to the plurality of sleeves 9121. The spring pin 920 is closely connected to the sleeve 9121.

[0040] Specifically, such as Figure 3 and 22As shown, in this embodiment, the plug-in portion 912 is integrally formed with ten sleeves 9121 towards the first circuit board 930. The sleeves 9121 are matched with the spring pins 920. The sleeves 9121 include a first sleeve 9121 and a second sleeve 9121 connected in sequence. The first sleeve 9121 protrudes from the top surface of the plug-in portion 912 towards the detection pin of the electronic device, and the second sleeve 9121 extends from the plug-in portion 912 towards the first circuit board 930. The spring pin 920 is partially close to the second sleeve 9121 and one end protrudes from the first sleeve 9121. The silicone sleeve 913, which is attached to the top surface of the plug-in portion 912, has a fixing hole 9134 corresponding to the first sleeve 9121.

[0041] The sleeve 9121 is used to fix the spring pin 920 and define the axial direction of the spring pin 920, so that the axial direction of the spring pin 920 is the insertion direction of the charging interface 90 and the charging port of the electronic device. The tight contact between the spring pin 920 and the sleeve 9121 can also prevent dust and water from entering the receiving cavity 914 through the sleeve 9121, reduce the circuit failure such as circuit sparks caused by dust and liquid in the first circuit board 930, improve the life of the first circuit board 930, protect the charging safety of the electronic device, and improve the explosion-proof performance of the explosion-proof charger.

[0042] Furthermore, the spring pin 920 includes a fixed cylinder 921 coaxially arranged and a PIN pin 922 retractably arranged at one end of the fixed cylinder 921; the outer wall of the fixed cylinder 921 is interference-fitted into the sleeve 9121, and the PIN pin 922 is retractably connected to the end of the sleeve 9121 away from the first circuit board 930.

[0043] Specifically, such as Figure 22 As shown, in this embodiment, the outer wall of the fixing cylinder 921 is interference-fitted with the second sleeve 9121, and the PIN pin 922 is telescopically connected to the first sleeve 9121. The fixing cylinder 921 provides axial elasticity to the PIN pin 922. The PIN pin 922 is used to connect with a detection pin in the electronic device. After connection, the first circuit board 930 sends a control command to enable the electronic device to charge. The diameter of the first sleeve 9121 is smaller than that of the second sleeve 9121, and the inner diameter of the fixing cylinder 921 is larger than that of the first sleeve 9121.

[0044] This design allows the spring pin 920 to be fixed axially, and the smaller diameter of the second sleeve 9121 further prevents dust and water from entering the receiving cavity 914, thereby protecting the first circuit board 930 and improving the explosion-proof performance of the explosion-proof charger.

[0045] Furthermore, the spring pin 920 also includes a first connecting post 923 and a second connecting post 924 coaxially connected to the fixed cylinder 921 in sequence. The first connecting post 923 abuts between the first circuit board 930 and the fixed cylinder 921; the second connecting post 924 passes through the first circuit board 930.

[0046] Specifically, such as Figure 22 As shown, in this embodiment, the fixing cylinder 921, the first connecting post 923, and the second connecting post 924 are coaxially connected in sequence. The inner diameter of the first connecting post 923 is larger than the inner diameter of the first sleeve 9121, which allows the first connecting post 923 to abut against the fixing cylinder 921 and the first circuit board 930. The first circuit board 930 is provided with a through hole 421 corresponding to the second connecting post 924 of the spring pin 920. The second connecting post 924 is used to fix the spring pin 920 to the first circuit board 930. This arrangement allows the spring pin 920 to be stably housed in the receiving cavity 914, further restricting the axial movement of the spring pin 920 and preventing the spring pin 920 from falling off or shifting. At the same time, since the first connecting post 923 abuts against the fixing cylinder 921 and the first circuit board 930, water and dust will not interfere with the safe use of the first circuit board 930 in the receiving cavity 914, further playing an explosion-proof role.

[0047] Preferably, the first fastener 910 is made of hard plastic.

[0048] Specifically, the first fixing component 910 is made of hard rubber, which provides significant friction with both the silicone sleeve and the spring pin 920. This allows the first fixing component 910 and the silicone sleeve 913 to fit together tightly, ensuring the sturdiness of the silicone sleeve 913 and the tight connection between the sleeve 9121 and the spring pin 920. Simultaneously, the hard rubber material also acts as an insulator, preventing the metal spring pin 920 from being damaged by friction with the first fixing component 910 or generating sparks. This further ensures the seal between the charging interface 90 and the detection pins of the electronic device, preventing dust, water, and electrical sparks from affecting the charging of the electronic device.

[0049] Furthermore, the charging interface 90 also includes a dustproof component 940 rotatably connected to the base 40. The dustproof component 940 includes a dustproof cover 941 that is tightly fitted to the outside of the silicone sleeve 913. The dustproof cover 941 is provided with a sealing groove 9411 that matches the first protruding ring 9131.

[0050] Specifically, such as Figure 1 and 2As shown, in this embodiment, one end of the dust cover 941 is rotatably connected to the base 40, and the other end is provided with a sealing groove 9411 that matches the first protruding ring 9131. The dust cover 941 is used to form a sealed space between itself and the first fixing member 910 in the uncharged state, preventing the PIN pin 922 of the spring pin 920 from being directly exposed to the air, and preventing dust and liquid from entering the receiving cavity 914 along the sleeve 9121.

[0051] Furthermore, the substrate 40 and the dustproof assembly 940 are provided with a dustproof cover 941 groove 4231 that matches the dustproof cover 941; The dustproof assembly 940 also includes a cover shaft 942 rotatably connected to the base 40. One end of the cover shaft 942 is connected to the dust cover 941, and the cover shaft 942 passes through the end of the dust cover 941 groove 4231 near the first fixing member 910. A limiting protrusion 9421 is provided at the end of the cover shaft 942 away from the dust cover 941. The limiting protrusion 9421 is used to limit the movement stroke of the cover shaft 942 in the direction of the base 40.

[0052] Specifically, such as Figure 1 and 5 As shown, in this embodiment, the dustproof assembly 940 further includes a fixing plug 943 protruding from the base 40. The cover pivot 942 includes a pivot portion 9422 passing through the dustproof cover 941 groove 4231 near the first fixing member 910, and a connecting portion 9423 integrally formed at one end of the pivot portion 9422. The connecting portion 9423 is interference-fitted to the dustproof cover 941. The connecting portion 9423 has a fixing hole 9134 axially formed along the cover pivot 942, and the fixing plug 943 passes through the fixing hole 9134. The pivot portion 9422 can drive the connecting portion 9423 to move along the pivot in a direction away from the base 40. During the movement, the fixing hole 9134 disengages from the fixing plug 943, and the dustproof cover 941 moves away from the first fixing member 910. A limiting protrusion 9421 is provided at the end of the rotating shaft 9422 away from the dust cover 941. The limiting protrusion 9421 is used to limit the movement stroke of the cover rotating shaft 942 in the direction away from the base 40. Preferably, the maximum movement stroke of the cover rotating shaft 942 is the height of the PIN pin 922 along the axial direction to the surface of the base 40. When the cover rotating shaft 942 moves to its maximum stroke in the direction away from the base 40, the cover rotating shaft 942 is rotated 180° and then moved in the direction closer to the base 40 until it is inserted into the groove 4231 of the dust cover 941. This completes the installation and removal of the dust cover 941. The cover rotating shaft 942 allows the dust cover 941 to be detachably installed on the first fixing member 910 by rotating the connection to the base 40. This effectively protects the charging interface 90 and facilitates the switching of the charging interface 90 from an unused state to a ready-to-use state.

[0053] Furthermore, the charging interface 90 also includes a second fixing member 950 fixed to the side of the first circuit board 930 opposite to the first fixing member 910. The second fixing member 950 is provided with a sealing groove 951 with an opening facing the first circuit board 930, and the projection of the spring pin 920 onto the second fixing member 950 is located within the sealing groove 951. Preferably, a sealing gasket 952 is provided between the sealing groove 951 and the first circuit board 930.

[0054] Specifically, such as Figure 3 and 22 As shown, one end of the second fixing member 950 is fixed to the first circuit board 930 and its edge abuts against the inner wall of the opening of the accommodating cavity. The second fixing member 950, the first circuit board 930, and the first fixing member 910 are sequentially fixed to the top of the protrusion of the front shell 420 by screws. The second fixing member 950, the protrusion of the front shell 420, and the surrounding part 424 of the front shell 420 form an accommodating cavity. The second fixing member 950 is integrally formed with a protruding mounting post 953 in the direction away from the first circuit board 930. The bottom surface of the rear shell 430 is provided with a mounting hole 431 that matches the mounting post 953. The mounting post 953 passes through the mounting hole 431.

[0055] A sealed space is formed between the sealing groove 951 and the first circuit board 930. The sealing gasket 952 can improve the sealing performance at the contact point between the sealing groove 951 and the first circuit board 930, preventing water and dust from entering the gap between the sealing groove 951 and the first circuit board 930 and causing short circuits or other effects on the first circuit board 930 and the spring pin 920 passing through the first circuit board 930. Ultimately, it can protect the charging interface 90, ensure the charging safety of electronic devices, and improve the explosion-proof performance of the explosion-proof charger.

[0056] Furthermore, the explosion-proof charger also includes a transmission clamping mechanism, which includes: The transmission component 20 is rotatably connected to the base 40. The transmission component 20 includes a main shaft 210 and an eccentric shaft 220 eccentrically disposed on the main shaft 210. The movable component 10 is movably connected to the base 40. The movable component 10 is provided with a transmission hole 111. The eccentric shaft 220 passes through the transmission hole 111. The movable component 10 is used to move linearly with the rotation of the transmission component 20. The charging switch 50 is fixed to the movable component 10. The linear movement direction of the pressing member 530 is the same as the linear movement direction of the movable component 10. The first elastic element 60 is connected between the base 40 and the moving part 10. The first elastic element 60 is used to provide a force to prevent the moving part 10 from moving linearly. The triggering component 30 is connected to the transmission component 20. The triggering component 30 is used to drive the transmission component 20 to rotate clockwise around the main shaft 210.

[0057] Specifically, in this embodiment, such as Figure 6 As shown, the base 40 also includes a top cover 410, and the top cover 410, the front shell 420, and the rear shell 430 enclose a receiving space for the transmission and clamping mechanism. The transmission component 20 and the moving component 10 are received in the receiving space. The main shaft 210 of the transmission component 20 protrudes from the receiving space, and the triggering component 30 is located outside the receiving space and one end is connected to the main shaft 210. This arrangement restricts the movement of the transmission shaft in three dimensions within the receiving space, fixing the transmission shaft to the base 40, and the transmission shaft can also rotate around the main shaft 210 in any clockwise direction.

[0058] The top cover 410 has two positioning arms 411 protruding vertically downward. The moving part 10 is slidably connected to the two positioning arms 411. Specifically, the moving part 10 is located between the two positioning arms 411 and its opposite sides abut against the two positioning arms 411. The positioning arms 411 are used to restrict the horizontal movement of the moving part 10.

[0059] The front cover 420 has a through hole 421 at the projection of the moving part 10 in the linear movement direction. The moving part 10 can protrude out of the receiving space through the through hole 421 and abut against the electronic device outside the base 40, and achieve a pressing effect in conjunction with the first elastic member 60.

[0060] The main shaft 210 is the drive shaft of the transmission clamping mechanism, and the radius of the main shaft 210 decreases uniformly along its length. One end of the triggering component 30 is connected to the main shaft 210, and the end of the triggering component 30 away from the main shaft 210 is used to apply force and drive the transmission component 20 to rotate about the main shaft 210 as the axial direction. The eccentric shaft 220 rotates clockwise with the main shaft 210 and drives the moving component 10 to move linearly.

[0061] The transmission component 20 also includes a fixed plate 230 connected between the main shaft 210 and the eccentric shaft 220. The eccentric shaft 220 and the fixed plate 230 form a gradually tapering inclined surface along the length extension direction. The inclined surface can set an arc-shaped interface between the fixed plate 230 and the eccentric shaft 220, reduce the noise of the transmission component 20 and the moving component 10 during the movement, reduce the wear between the components of the transmission pressing mechanism, increase the service life of the transmission pressing mechanism, and optimize the user experience.

[0062] The housing 510 of the charging switch 50 is fixed to the moving part 10 and is used to move along the linear moving direction of the moving part 10. The second circuit board 520 is fixed to the housing 510 and is used to move along the linear moving direction of the moving part 10. The pressing member 530 is movably connected to the housing 510. The second circuit board 520 and the pressing member 530 are spaced apart.

[0063] As an example, when no external force is applied to the triggering component 30 to drive the transmission component 20 to rotate, the moving component 10 part passes through a through hole 421, and the transmission clamping mechanism is in the initial clamping state.

[0064] An external force is applied to the triggering component 30 to drive the transmission component 20 to rotate, causing the transmission component 20 to rotate 90° about the main shaft 210 as the axial direction. The eccentric shaft 220 passes through the transmission hole 111 of the moving component 10. The moving component 10 converts the rotational motion of the transmission component 20 into linear movement. The moving component 10 moves away from the through hole 421 until it is completely housed in the housing space, and the transmission clamping mechanism is in a pre-clamped state. At the same time, the housing 510 of the charging switch 50 moves linearly with the moving component 10 so that the charging switch 50 is completely housed in the housing space.

[0065] When the external force that drives the transmission component 20 to rotate is stopped from being applied to the trigger component 30, the first elastic member 60 provides a spring force to prevent the moving component 10 from moving away from the through hole 421. The moving component 10 moves towards the through hole 421 under the spring force provided by the first elastic member 60, and the transmission clamping mechanism returns to the initial clamping state. At the same time, the housing 510 of the charging switch 50 moves linearly with the moving component 10, and the pressing member 530 protrudes outside the receiving space. If the explosion-proof charger is equipped with electronic equipment, one end of the pressing member 530 abuts against the electronic equipment and moves towards the second circuit board 520 until it abuts against the second circuit board 520.

[0066] When applied to this explosion-proof charger, on the one hand, the transmission clamping mechanism is used to clamp and fix the electronic device, ensuring that the detection pin of the charging port of the electronic device is accurately aligned with the charging interface 90; on the other hand, the transmission component 20 of the transmission clamping mechanism has a simple structure, and the main shaft 210 and the eccentric shaft 220 can enable the moving component 10 to reach the maximum moving distance within the shortest rotation stroke, making operation labor-saving and convenient. The overall space occupied by the transmission clamping mechanism is small, further saving materials and reducing manufacturing costs. When the transmission clamping mechanism is applied to the electronic device charger, the user can quickly fix and clamp the electronic device and actively control the opening and closing of the charging switch 50. Then, the electronic device is charged through two steps: connecting the electronic device to the charging interface 90 and the charging switch 50 to power the charging interface 90. This makes the explosion-proof charger play an explosion-proof role, making it safer and more reliable.

[0067] Furthermore, such as Figures 8-12As shown, the moving component 10 includes a transmission component 110. One end of the transmission component 110 relative to the first elastic component 60 is provided with a pressing protrusion 112. The pressing protrusion 112 passes through a through hole 421 and protrudes from the receiving space. An electronic device outside the base 40 is provided with a groove that matches the pressing protrusion 112. In the initial pressing state, the pressing protrusion 112 can pass through the groove of the electronic device, thus quickly pressing the electronic device.

[0068] Furthermore, such as Figure 9 As shown, the sidewall of the transmission hole 111 protrudes with a stepped portion 1111 that matches the eccentric shaft 220. The stepped portion 1111 includes a plane 1111a and a transition surface 1111b that connects from the plane 1111a to the inner wall of the adjacent transmission hole 111. The plane 1111a extends away from the first elastic member 60 and is perpendicular to the inner wall of the transmission hole 111. The cross-section of the transition surface 1111b perpendicular to the axis of rotation of the transmission component 20 is arc-shaped.

[0069] The cross section of the transition surface 1111b perpendicular to the axis of the main shaft 210 includes a circular arc and a curve connected in sequence with radius R2, R2:R1=2:1. The other end of the curve is connected to a quarter circle with radius R1. The circular arc with radius R2 inside the transition surface 1111b can intersect with the inner wall of the transmission hole 111 away from the pressing protrusion 112.

[0070] After the stepped portion 1111 and the eccentric shaft 220 rotate 90° about the main shaft 210 as the axial direction, they are opposite each other. First, the stepped portion 1111 can limit the rotational stroke of the transmission component 20. Second, the plane 1111a extending from the side wall of the transmission hole 111 towards the pressing protrusion 112 and the transition surface 1111b connecting to the inner wall of the adjacent transmission hole 111 in the stepped portion 1111 can increase the distance the moving component 10 rises after the transmission component 20 has rotated and fixed its stroke. This makes it easier for the user and achieves the effect of quickly pressing and fixing the electronic device using the transmission pressing mechanism. Finally, the cross-section of the stepped portion 1111 perpendicular to the axis of the main shaft 210 is arc and curved, which can reduce the noise generated by the eccentric shaft 220 and the transmission hole 111 during rotation. This further makes the rotational motion of the transmission mechanism more smoothly converted into the linear movement of the moving component 10, improves the user experience of the transmission pressing mechanism, and makes the opening process of the charging switch 50 smoother.

[0071] Furthermore, such as Figure 10 and 19 As shown, the outer contour of the cross section of the eccentric shaft 220 perpendicular to its axial direction is a closed ring with smooth edges, and the widest width of the cross section is perpendicular to the radial direction of the main shaft 210.

[0072] Specifically, in this embodiment, such as Figure 5As shown, the closed ring comprises two ellipses sharing a common principal diameter α. The principal diameter α is set along the widest direction of the closed ring's cross-section. The minor axis β of the ellipse closer to the center of the principal axis 210 is shorter than the principal diameter α, while the major axis γ of the ellipse farther from the center of the principal axis 210 is greater than or equal to the principal diameter α, where β + γ < α. Preferably, 1 ≤ γ : α ≤ 1.2. As an example, β : α = 0.5, γ : α = 1.125.

[0073] With the parameters γ≥α>β of the two ellipses in the closed ring, the ellipse closer to the axis of the main shaft 210 has a larger eccentricity and is flatter, while the ellipse farther from the axis of the main shaft 210 has a smaller eccentricity and is closer to a circle. Correspondingly, the eccentric shaft 220 includes a first semicircular portion 221 close to the axis of the main shaft 210 and a second semicircular portion 222 far from the axis of the main shaft 210. Compared with the eccentric shaft 220 with a perfect circular cross-section, when the rotational stroke is the same, the smaller the ratio of the length of the minor axis β to the length of the main diameter α, the greater the distance that the first semicircular portion 221 can drive the moving part 10 to move linearly. This further saves the space required for the operation of the transmission mechanism. With this setting, the user can save effort, the transmission clamping mechanism occupies a smaller volume, and the electronic device can be quickly clamped and fixed using the transmission clamping mechanism and the charging switch 50 can be turned on for charging.

[0074] Preferably, the rotation angle of the transmission component 20 is best between 0 and 90°. The short axis of the semi-elliptical portion is arranged radially along the main shaft 210 so that when the eccentric shaft 220 rotates 90° clockwise around the main shaft 210, the vertical movement distance of the moving component 10 is maximized. Compared with the cliff-shaped cam design in related technologies, the eccentric shaft 220 with an elliptical cross-section has lower noise, smoother movement, greater flexibility, and a better user experience.

[0075] In other embodiments, a plane 1111a may be provided at the contact point between the eccentric shaft 220 and the moving part 10 at a fixed angle. The area of ​​the plane 1111a is as small as possible, and the plane 1111a and other parts of the eccentric shaft 220 are transitioned by an arc surface, which further improves the user experience of the eccentric shaft 220 when it is in motion and at rest.

[0076] Furthermore, such as Figure 8 and Figure 11As shown, the moving component 10 also includes an assembly 120 spaced apart from the transmission component 110 along a direction perpendicular to the length of the transmission hole 111. The assembly 120 is used to mount the charging switch 50. The assembly 120 includes a first mounting arm 121, a second mounting arm 122, and a third mounting arm 123 connected in sequence. The length of the second mounting arm 122 is perpendicular to the length of the transmission hole 111. The first mounting arm 121 and the third mounting arm 123 are arranged in parallel and have the same length extension direction. The first mounting arm 121 and the third mounting arm 123 are symmetrically provided with mounting grooves that match the charging switch 50. The charging switch 50 is fixedly connected to the first mounting arm 121 and the third mounting arm 123 through the two ends of the mounting grooves. The charging switch 50 is a push-button switch and is housed in a receiving space. The base 40 has an opening corresponding to the projection of the charging switch 50 in the linear movement direction, and a portion of the charging switch 50 protrudes from this opening.

[0077] The moving part 10 also includes an insulating bracket 124. The second mounting arm 122 has multiple positioning blocks protruding in a direction away from the length of the first mounting arm 121 and the third mounting arm 123. For example, the second mounting arm 122 has two symmetrically protruding positioning blocks. The insulating bracket 124 covers each positioning block and extends from the surface of one positioning block to an adjacent positioning block to form an extension frame 1241. The insulating bracket 124 and the extension frame 1241 on the surfaces of two adjacent positioning blocks enclose a wiring hole 125, which is used to allow the connecting wire of the charging switch 50 on the assembly 120 to pass through. The wiring hole 125 allows the connecting wire of the charging switch 50 to be neatly connected to other circuits. The insulating bracket 124 has good insulation properties, preventing leakage from the charging switch 50 or its connecting wire from posing a risk of electric shock to the user of the transmission clamping mechanism.

[0078] Furthermore, such as Figure 6 and 13 As shown in ~15, the transmission pressing mechanism also includes a limiting spring component 80, which further includes a first limiting structure 810 fixed to the base 40, a second limiting structure 820 fixed to the transmission component 20, and a second elastic element 830 whose two ends are respectively connected to the first limiting structure 810 and the second limiting structure 820.

[0079] The second limiting structure 820 is rotatably connected to the first limiting structure 810 in a clockwise direction with the main shaft 210 as the axis. The first limiting structure 810 is provided with a plurality of limiting grooves 811 whose width gradually decreases in a clockwise direction as the second limiting structure 820 rotates around the main shaft 210. The second limiting structure 820 is provided with a plurality of sliders 821 that match each limiting groove 811. The sliders 821 are elastic, and the width of the sliders 821 in the radial direction of the main shaft 210 is greater than the minimum width of the limiting grooves 811.

[0080] The second elastic element 830 is used to provide the second limiting mechanism with an axial force in another clockwise direction about the main shaft 210.

[0081] Specifically, such as Figures 12-15 As shown, in this embodiment, the limiting and rebounding component 80 is housed in the receiving space. One end of the main shaft 210 passes through the first limiting structure 810. The first limiting structure 810 and the main shaft 210 are coaxially provided with three limiting grooves 811 connected in sequence to form a groove. The width of the three limiting grooves 811 gradually decreases along the movement direction of the second limiting structure 820. The three limiting grooves 811 are of equal length. The second limiting structure 820 is provided with three sliders 821 evenly spaced corresponding to the grooves. The cross-section of the sliders 821 is hexagonal. The opposite side walls of the hexagonal sliders 821 abut against the groove walls of the limiting grooves 811.

[0082] The limiting and rebound structure, through the setting of a first limiting structure 810 and a second limiting structure 820 rotatably connected to the first limiting structure 810, limits the rotation angle of the transmission component 20 of the transmission pressing mechanism. The gradually narrowing limiting groove 811 forms a resistance limit, allowing the slider 821 to cleverly interfere with the limiting groove 811. This limiting and rebound structure is a simplified rotation limiting structure. After the transmission component 20 in the transmission pressing mechanism rotates to a certain angle, the user can maintain the transmission pressing mechanism in a pre-pressed state without applying external force to the trigger component. This further facilitates the user's use of the transmission pressing mechanism to press the electronic device, and ensures that the two ends of the charging switch 50 abut against the contact points of the electronic device and the second circuit board 520, simplifying the operation steps of the transmission pressing mechanism, saving effort, and making it convenient and quick. It can quickly start the charging switch 50 and ensure that the charging interface 90 is stably connected to the charging port of the electronic device, avoiding sparks generated during instantaneous charging, making the explosion-proof charger safer and more reliable.

[0083] Preferably, the width of the slider 821 is equal to the maximum width of the limiting groove 811. The width of the limiting groove 811 gradually decreases. When the width between the opposite sides of the hexagonal slider 821 is equal to the maximum width of the limiting groove 811, the greater the stroke of the second limiting structure 820 rotating in one clockwise direction and the closer the slider 821 is to the next limiting groove 811, the greater the friction between the limiting groove 811 and the slider 821, and the greater the force that the user needs to apply to the triggering component 30. Conversely, the greater the stroke of the second limiting structure 820 rotating in the other clockwise direction, the easier it is to operate.

[0084] In other embodiments, within the allowable range of elastic deformation of slider 821, the width of slider 821 may be slightly larger than the maximum width of limiting groove 811, as long as it is within the maximum elastic deformation range that slider 821 can withstand.

[0085] The second elastic element 830 is a torsion spring. Applying an external force to the triggering component 30 can drive the second limiting structure 820 to rotate clockwise around the main shaft 210. The gradually narrowing limiting groove 811 allows the slider 821 to experience increasing pressure from the groove wall when the second limiting structure 820 rotates around the main shaft 210. Due to the elasticity of the slider 821, its width in the radial direction of the main shaft 210 is greater than the minimum width of the limiting groove 811, allowing the slider 821 to move from one limiting groove 811 to the maximum width of the next limiting groove 811. Subsequently, because the second elastic element 830 can provide the second limiting structure 820 with a force relative to the first limiting structure 810 rotating clockwise around the main shaft 210, the slider 821 of the second limiting structure 820 can abut against the maximum width of the next limiting groove 811 when the external force on the triggering component 30 stops. Finally, a force is applied to the trigger component 30 in another clockwise direction around the main shaft 210, causing the slider 821 of the second limiting structure 820 to return to the initial limiting groove 811. At this point, the force applied to the trigger component 30 is stopped, and the second limiting structure 820 can return to its initial position through the elastic force of the second elastic member 830. The second elastic member 830 can both assist the limiting spring structure in maintaining the limiting state and release the limiting spring structure from the limiting state.

[0086] Preferably, the second limiting structure 820 is made of rubber. Rubber is a highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce a large deformation under a small external force, and can return to its original shape after the external force is removed. Utilizing the properties of rubber, the slider 821 of the second limiting structure 820 can slide with interference fit in the limiting groove 811 of the first limiting structure 810. Furthermore, in this transmission pressing mechanism, using rubber for the second limiting structure 820 can avoid sparks generated by rotation with the metal first limiting structure 810. The high wear resistance of rubber also significantly reduces frictional loss between the second limiting structure 820 and the first limiting structure 810, extending the service life of the limiting and rebounding structure. In other embodiments, the second limiting structure 820 may also use metal internally, with a rubber layer of a certain thickness on its surface.

[0087] Furthermore, multiple limiting grooves 811 are connected end to end to form a closed loop, and a limiting wall 8111 is formed at the connection between two adjacent limiting grooves 811. The included angle A between the limiting wall 8111 and the side wall of the limiting groove 811 is greater than 90° and less than 150°.

[0088] Specifically, in this embodiment, such as Figures 13-14As shown, multiple limiting grooves 811 are connected at both ends in sequence. The groove walls at the connection points of the multiple limiting grooves 811 converge to form limiting walls 8111. The slider 821 is provided with limiting surfaces 8211 that match the limiting walls 8111. The adjacent two sides of the hexagonal slider 821 form two limiting surfaces 8211 that match the limiting walls 8111. The limiting surfaces 8211 utilize a beveled fit design to achieve resistance limiting on the beveled surface, enabling them to work with the elastic element to maintain the limiting rebound structure in a limited state.

[0089] As an example, the included angle A is 124°. The included angle A of the inward inclination of the limiting wall 8111 is the angle between the cross sections of the limiting wall 8111 and the limiting groove 811 near the end of the limiting wall 8111 along the width direction. When the second limiting structure 820 rotates clockwise around the drive shaft, if the included angle A between the side walls of the limiting wall 8111 and the limiting groove 811 is greater than 150°, the limiting effect is poor. If the included angle A between the side walls of the limiting wall 8111 and the limiting groove 811 is less than 90°, the clockwise rotation of the second limiting structure 820 will be irreversible and cannot return to the initial state. Setting the included angle A between the side walls of the limiting wall 8111 and the limiting groove 811 in the range of 90° to 150° better realizes the resistance limiting and automatic rebound function of the limiting rebound structure.

[0090] It should be understood that the number and length of the limiting grooves 811 are related to the rotation angle of the transmission component 20 that needs to be limited. Those skilled in the art can design the position and number of the limiting grooves 811 and their corresponding sliders 821 according to different needs. In other embodiments, the limiting wall 8111 can also be a limiting protrusion 9421 protruding from the groove wall.

[0091] Furthermore, the transmission pressing mechanism also includes a limiting member 70 rotatably connected to the base 40. The limiting member 70 has a limiting groove 7241 that matches the eccentric shaft 220. One end of the eccentric shaft 220 passes through the limiting groove 7241, and the whole body of the eccentric shaft 220 abuts against the inner wall of the limiting groove 7241.

[0092] Specifically, such as Figure 18 As shown, in this embodiment, the limiting member 70 includes a fixed cylinder 921, a movable part 720 rotatably connected to the fixed cylinder 921, and a key 730 snapped into the movable part 720; The base 40 has a mounting hole that matches the fixing cylinder 921. The fixing cylinder 921 passes through the mounting hole and is fixed to the base 40. The movable part 720 includes a fixed post 721 and a limiting block 724 spaced apart from the fixed post 721. The fixed post 721 passes through the fixed cylinder 921 and rotates coaxially with the fixed cylinder 921. The limiting block 724 is provided with a limiting groove 7241. The key 730 is used to rotate the movable part 720 about the axis of the fixed cylinder 921.

[0093] The limiting member 70 is spaced apart from the moving member 10, and the axis of rotation of the limiting member 70 is parallel to the direction of linear movement of the moving member 10. The eccentric shaft 220 has a limiting portion 223 passing through the limiting groove 7241 in the direction away from the main shaft 210. The adjacent two sides of the limiting portion 223 near the limiting groove 7241 abut against the inner wall of the limiting groove 7241, thus limiting the rotation of the transmission member 20. The projection of the limiting portion 223 along the axial direction of the main shaft 210 is inside the eccentric shaft 220, and the eccentric shaft 220 abuts against the surface of the limiting member 70 facing the main shaft 210. In the initial clamping state, the transmission clamping mechanism rotates the limiting member 70 clockwise, bringing the limiting groove 7241 closer to the eccentric shaft 220. The eccentric shaft 220 abuts against the inner wall of the limiting groove 7241, and the transmission component 20 is in a locked state that restricts rotation. When the limiting member 70 is rotated clockwise, the limiting groove 7241 moves away from the eccentric shaft 220, and the transmission component 20 is in an unlocked state that allows rotation. The transmission clamping mechanism can switch between the initial clamping state and the pre-clamping state.

[0094] The top cover 410 of the base 40 is recessed into the receiving space to form a mounting groove. The mounting groove is provided with mounting holes that match the limiting member 70. The base 40 also includes a dust cover 941 that matches the mounting groove and is detachably connected to the mounting groove.

[0095] The limiting member 70 includes a fixed part 710 fixedly connected to the base 40, a movable part 720 rotatably connected to the fixed part 710, and a key 730 snapped into the movable part 720.

[0096] The fixing part 710 includes a fixing cylinder 921, a fixing nut 712, and a fixing pin 714. The fixing cylinder 921 includes a first fixing cylinder 711 and a second fixing cylinder 713. The first fixing cylinder 711 passes through the mounting hole, and the fixing nut 712 is screwed onto the cylinder wall of the first fixing cylinder 711 located within the receiving space. The second fixing cylinder 713 passes through the first fixing cylinder 711, and the first fixing cylinder 711 has a pin hole corresponding to the second fixing cylinder 713 that matches the fixing pin 714. The fixing pin 714 passes through the pin hole and is detachably connected to the second fixing cylinder 713. Through the above arrangement, the fixing part 710 is fixedly connected to the base 40.

[0097] The active part 720 includes a fixed cover, a fixed post 721, at least one positioning post 722, a connecting arm 723, and a limiting block 724.

[0098] The fixing post 721 includes a first fixing post 7211, a second fixing post 7212 and a third fixing post 7213 connected sequentially from the top cover 410 to the second fixing cylinder 713.

[0099] The first fixing post 7211 is inserted through the mounting hole, and the first fixing post 7211 is provided with a snap-fit ​​groove that matches the key 730; The second fixing post 7212 is located between the top cover 410 and the second fixing cylinder 713. The second fixing post 7212 is provided with at least one positioning hole along the length extension direction. The positioning post 722 passes through the positioning hole. As an example, the second fixing post 7212 is provided with four positioning holes, and a positioning post 722 is provided accordingly. The third fixing post 7213 passes through the second fixing cylinder 713. One end of the connecting arm 723 abuts against the end of the first fixing cylinder 711 away from the top cover 410 and is screwed to the third fixing post 7213. The other end of the connecting arm 723 is integrally connected to the limiting block 724. The limiting block 724 is provided with a limiting groove 7241.

[0100] The fixed cover is correspondingly provided with the first fixed cylinder 711 and is snapped into the mounting groove. The key 730 is used to pass through the fixed cover and abut against the positioning post 722. When the key 730 is inserted, the positioning post 722 abuts against the bottom of the positioning hole to prevent the key 730 from being inserted further. Rotating the key 730 will allow the entire movable part 720 to rotate around the axis of the first fixed cylinder 711, so that the limiting groove 7241 of the movable part 720 moves away from the limiting part 223 of the eccentric shaft 220, or is sleeved on the limiting part 223 of the eccentric shaft 220.

[0101] The limiting part 223 and the corresponding limiting member 70 can lock the transmission clamping mechanism, restrict the rotation of the transmission component 20 when the transmission clamping mechanism is not moving, and thus restrict the linear movement of the moving component 10. With a simplified structure, it meets the locking function of the transmission clamping mechanism in electronic device applications, occupies little space, saves the overall material of the transmission clamping mechanism, and enables the electronic device to be fixed in the explosion-proof charger during charging, making the charging process more stable.

[0102] Working principle: Please see Figure 1-22 First, when no external force is applied to the triggering component 30 to drive the transmission component 20 to rotate, the moving component 10 part passes through the through hole 421, the transmission clamping mechanism is in the initial clamping state, the pressing member 530 of the charging switch 50 protrudes outside the receiving space, the pressing member 530 is spaced apart from the second circuit board 520, and no electronic equipment is placed at this time.

[0103] Secondly, an external force is applied to the triggering component 30 to drive the transmission component 20 to rotate, causing the transmission component 20 to rotate 90° clockwise about the main shaft 210. The eccentric shaft 220 passes through the transmission hole 111 of the moving component 10, and the moving component 10 converts the rotational motion of the transmission component 20 into linear motion. The moving component 10 moves away from the through hole 421 until it is completely housed within the receiving space. Simultaneously, the second limiting structure 820 in the limiting and rebounding structure is fixedly connected to the transmission component 20. The second limiting structure 820 also rotates 90° clockwise about the main shaft 210. The slider 821 on the second limiting structure 820 moves from the initial position of the limiting groove 811 on the first limiting structure 810 to the maximum width of the next limiting groove 811, stopping the application of the external force to the triggering component 30 to drive the transmission component 20 to rotate. The second elastic element 830 can provide relative support to the second limiting structure 820. The force causing the first limiting structure 810 to rotate clockwise around the main shaft 210 causes the slider 821 of the second limiting structure 820 to abut against the maximum width of the next limiting groove 811. The transmission component 20 also stops moving with the second limiting structure 820, and the moving component 10 remains fully housed within the receiving space. The housing 510 of the charging switch 50 moves linearly with the moving component 10, allowing the entire charging switch 50 to be fully housed within the receiving space. The pressing component 530 is spaced apart from the second circuit board 520. At this time, the transmission pressing mechanism is in a pre-pressed state, allowing the user to place the electronic device into the charger. The charging port of the electronic device connects to the charging interface 90 of the explosion-proof charger, but no power is supplied.

[0104] Finally, an instantaneous external force is applied to the triggering component 30 to rotate the transmission component 20. The slider 821 on the second limiting structure 820 undergoes elastic deformation. The slider 821 returns from the maximum width of the first limiting groove 811 to the previous limiting groove 811. The second limiting structure 820 is subjected to a force provided by the second elastic element 830 that rotates relative to the first limiting structure 810 in another clockwise direction with the main shaft 210 as the axis. The slider 821 returns to the initial position of the previous limiting groove 811. At this time, the transmission component 20 rotates 90° clockwise around the main shaft 210. The moving component 10 is partially inserted through the through hole 421, and the first elastic member 60 provides a spring force to prevent the moving component 10 from moving away from the through hole 421. The moving component 10 moves towards the through hole 421 under the spring force provided by the first elastic member 60. The transmission pressing mechanism returns to the initial pressing state. The pressing protrusion 112 is inserted into the groove on the electronic device that matches the pressing protrusion 112. The electronic device is fixed in the charger, and the housing 510 of the charging switch 50 moves linearly with the moving component 10. The pressing member 530 protrudes out of the receiving space. One end of the pressing member 530 abuts against the electronic device and moves towards the second circuit board 520 to the contact point abutting against the second circuit board 520. The second circuit board 520 is electrically connected to the first circuit board 930 of the charging interface 90 and controls the first circuit board 930 to energize the spring pin 920. The explosion-proof charger can charge the electronic device.

[0105] Furthermore, when the transmission clamping mechanism is in the initial clamping state, the limiting member 70 is rotated clockwise, and the limiting groove 7241 approaches the eccentric shaft 220. The eccentric shaft 220 abuts against the inner wall of the limiting groove 7241, and the transmission component 20 is in a locked state that restricts rotation. When the limiting member 70 is rotated clockwise, the limiting groove 7241 moves away from the eccentric shaft 220, and the transmission component 20 is in an unlocked state that allows rotation. The transmission clamping mechanism can switch between the initial clamping state and the pre-clamping state.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An explosion-proof charger for charging electronic devices, characterized in that, include: The base, charging interface, charging switch, and transmission clamping mechanism; The charging interface is fixed to the base, and the charging interface includes the base, a first fixing member, a plurality of spring pins and a first circuit board; The first fastener includes a base portion fixed to the base and an insertion portion protruding from the base. The surface of the first fastener is covered with a silicone sleeve. The silicone sleeve has a first protruding ring protruding around the insertion portion, and the silicone sleeve has a second protruding ring protruding around the edge of the base portion and in a direction away from the base portion. The first circuit board is fixed to the base and located on the side of the seat portion away from the plug portion. One end of the spring pin is fixed to the first fixing member and protrudes from the first fixing member in a direction away from the seat portion. The other end of the spring pin is connected to the first circuit board. The charging switch is movably connected to the base. The charging switch includes a second circuit board electrically connected to the first circuit board and a pressing member movably connected to the second circuit board. The pressing member is used to move linearly relative to the second circuit board and abut against the contact point of the second circuit board to energize the charging interface. The base is provided with a through hole along the linear movement direction of the pressing member to allow the pressing member to pass through. The transmission pressing mechanism includes: A transmission component is rotatably connected to the base body, and the transmission component includes a main shaft and an eccentric shaft eccentrically disposed on the main shaft; A movable component is movably connected to the base. The movable component is provided with a transmission hole, and the eccentric shaft passes through the transmission hole. The movable component is used to move linearly with the rotation of the transmission component. The charging switch is fixed to the movable component, and the linear movement direction of the pressing member is the same as the linear movement direction of the movable component. A first elastic element is connected between the base and the moving component, and the first elastic element is used to provide a force to prevent the moving component from moving linearly; A triggering component is connected to the transmission component, and the triggering component is used to drive the transmission component to rotate clockwise around the main shaft.

2. The explosion-proof charger according to claim 1, characterized in that, The base has mounting holes that match the seat portion, and the inner wall of the mounting holes is provided with mounting ring grooves. The silicone sleeve has a third protruding ring that matches the mounting ring grooves around the seat portion.

3. The explosion-proof charger according to claim 1, characterized in that, The charging interface also includes a dustproof component rotatably connected to the base. The dustproof component includes a dustproof cover that is tightly fitted to the outside of the silicone sleeve. The dustproof cover is provided with a sealing groove that matches the first protruding ring.

4. The explosion-proof charger according to claim 3, characterized in that, The substrate and the dustproof component are provided with a dustproof cover groove that matches the dustproof cover; The dustproof assembly also includes a cover shaft rotatably connected to the base. One end of the cover shaft is connected to the dustproof cover, and the cover shaft passes through the end of the dustproof cover groove near the first fixing member. A limiting protrusion is provided at the end of the cover shaft away from the dustproof cover, and the limiting protrusion is used to limit the movement of the cover shaft toward the base.

5. The explosion-proof charger according to claim 1, characterized in that, The sidewall of the transmission hole protrudes with a stepped portion that matches the eccentric shaft. The stepped portion includes a plane and a transition surface that connects the plane to the adjacent inner wall of the transmission hole. The plane extends away from the first elastic element and is perpendicular to the inner wall of the transmission hole. The cross-section of the transition surface perpendicular to the axis of rotation of the transmission component is arc-shaped.

6. The explosion-proof charger according to claim 1, characterized in that, The outer contour of the cross-section of the eccentric shaft perpendicular to its axial direction is a closed ring with smooth edges, and the widest width direction of the cross-section is perpendicular to the radial direction of the main shaft.

7. The explosion-proof charger according to claim 1, characterized in that, The transmission pressing mechanism further includes a limiting and rebounding component, which includes a first limiting structure fixed to the base, a second limiting structure fixed to the transmission component, and a second elastic element whose two ends are respectively connected to the first limiting structure and the second limiting structure. The second limiting structure is rotatably connected to the first limiting structure in a clockwise direction with the main shaft as the axis. The first limiting structure is provided with a plurality of limiting grooves whose width gradually decreases in a clockwise direction around the main shaft. The second limiting structure is provided with a plurality of sliders that match each of the limiting grooves. The sliders are elastic, and the width of the sliders in the radial direction of the main shaft is greater than the minimum width of the limiting grooves. The second elastic element is used to provide the second limiting mechanism with an axial force in another clockwise direction about the main shaft.

8. An explosion-proof charger according to claim 7, characterized in that, Multiple limiting grooves are connected end to end to form a closed loop, and a limiting wall is formed at the connection of two adjacent limiting grooves. The included angle A between the limiting wall and the side wall of the limiting groove is greater than 90° and less than 150°.

9. An explosion-proof charger according to claim 1, characterized in that, The transmission pressing mechanism further includes a limiting member rotatably connected to the base. The limiting member has a limiting groove that matches the eccentric shaft. One end of the eccentric shaft passes through the limiting groove, and the circumference of the eccentric shaft abuts against the inner wall of the limiting groove.

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