CN117375145A

CN117375145A - Explosion-proof charger

Info

Publication number: CN117375145A
Application number: CN202311229696.0A
Authority: CN
Inventors: 陈东明; 熊斌; 赵方明
Original assignee: Power Idea Technology Shenzhen Co Ltd
Current assignee: Power Idea Technology Shenzhen Co Ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2024-01-09

Abstract

The invention provides an explosion-proof charger, which is characterized in that a silica gel sleeve with insulativity and elasticity is covered on the surface of a charging interface, the silica gel sleeve is protruded to a first convex ring and a second convex ring around a first fixing piece, so that a spring needle of the charging interface of the charger is accurately abutted with a corresponding detection pin of electronic equipment. The explosion-proof charger provided by the invention can avoid carrying static electricity or generating instant large current when electronic equipment is charged, and can be applied to production operation sites with explosion-proof requirements.

Description

Explosion-proof charger

Technical Field

The invention belongs to the field of electronic equipment, and particularly relates to an explosion-proof charger.

Background

The charger is an indispensable electronic equipment accessory in daily life, and along with the continuous development of electronic information technology, the portable electronic equipment is also widely applied to factories or various construction sites, such as large-scale operation sites of petrochemical industry, tunnel construction, mining and the like. Most factories and construction sites have severe environments, a large amount of flammable and explosive gases exist, and if large current or static electricity is carried at the moment of charging, great potential safety hazards can be brought to production operation sites.

Disclosure of Invention

The invention aims to solve the technical problem of potential safety hazard caused by carrying static electricity or generating instant heavy current when electronic equipment is charged.

In order to solve the technical problems, the invention is realized in such a way that an explosion-proof charger comprises: comprising the following steps: a base; the charging interface is fixed on the base body and comprises a base body, a first fixing piece, a plurality of spring pins and a first circuit board;

the first fixing piece comprises a base body part fixed on the base body and a plug-in part protruding out of the base body, and the surface of the first fixing piece is covered with a silica gel sleeve; the silica gel sleeve is provided with a first convex ring in a protruding mode around the whole body of the plug-in portion, and the silica gel sleeve is provided with a second convex ring in a protruding mode around the edge of the seat body and in a direction away from the seat body;

the first circuit board is fixed on the base body and is positioned on one side of the base body, which is away from the plug-in connection part, one end of the spring needle is fixed on the first fixing piece and protrudes out of the first fixing piece towards the direction away from the base body, and the other end of the spring needle is connected with the first circuit board;

the charging switch is movably connected to the base body, the charging switch comprises a second circuit board and a pressing piece, the second circuit board is electrically connected to the first circuit board, the pressing piece is movably connected to the second circuit board, the pressing piece is used for linearly moving relative to the second circuit board and is abutted to a contact point of the second circuit board to enable the charging interface to be electrified, and the base body is provided with a through hole which enables the pressing piece to pass through along the linear moving direction of the pressing piece.

Further, the base body is provided with a mounting hole matched with the base body, the inner wall of the mounting hole is provided with a mounting ring groove, and the silica gel sleeve is protruded around the whole body of the base body to form a third convex ring matched with the mounting ring groove.

Further, the first fixing piece extends from the plug-in portion to the circuit board direction to form a plurality of sleeves, one end of each sleeve protrudes out of the plug-in portion, the silica gel sleeve is provided with a plurality of fixing holes corresponding to the plurality of sleeves, and the spring needle is closely connected in the sleeve.

Further, the spring needle comprises a fixed cylinder and a PIN needle, wherein the fixed cylinder and the PIN needle are coaxially arranged; the fixed cylinder outer wall interference fit in the sleeve, the PIN needle telescopic connection in the sleeve keep away from the one end of circuit board.

Further, the spring needle further comprises a first connecting column and a second connecting column which are coaxially and sequentially connected with the fixed cylinder, and the first connecting column is abutted between the circuit board and the fixed cylinder; the second connecting column penetrates through the circuit board.

Preferably, the first fixing piece is made of hard rubber.

Further, the charging interface further comprises a dustproof assembly rotationally connected to the base body, the dustproof assembly comprises a dustproof cover closely connected to the outside of the silica gel sleeve, and the dustproof cover is provided with a sealing groove matched with the first convex ring.

Further, a dust cover groove matched with the dust cover is formed between the base body and the dust-proof assembly at intervals;

the dustproof assembly further comprises a cover body rotating shaft rotatably connected with the base body, one end of the cover body rotating shaft is connected with the dustproof cover, and the cover body rotating shaft penetrates through one end, close to the first fixing piece, of the dustproof cover groove; one end of the cover body rotating shaft, which is far away from the dust cover, is provided with a limiting protrusion, and the limiting protrusion is used for limiting the moving stroke of the cover body rotating shaft towards the direction of the base body.

Further, the charging interface further comprises a second fixing piece fixed on one side, away from the first fixing piece, of the circuit board, the second fixing piece is provided with a sealing groove with an opening facing the circuit board, and the projection of the spring needle on the second fixing piece is located in the sealing groove.

Further, a sealing gasket is arranged between the sealing groove and the circuit board.

Further, the explosion-proof charger still includes transmission hold-down mechanism, transmission hold-down mechanism includes:

the transmission component is rotationally connected with the base body and comprises a main shaft and an eccentric shaft eccentrically arranged on the main shaft;

The moving component is movably connected with the base body, the moving component is provided with a transmission hole, the eccentric shaft penetrates through the transmission hole, and the moving component is used for moving linearly along with the rotation of the transmission component; the charging switch is fixed on the moving part, and the linear moving direction of the pressing part is the same as the linear moving direction of the moving part;

a first elastic member connected between the base and the moving member, the first elastic member for providing a force to prevent the moving member from moving linearly;

the trigger component is connected with the transmission component and is used for driving the transmission component to rotate in a time needle direction by taking the main shaft as an axial direction.

Further, the moving part comprises a transmission part, a pressing protrusion is arranged at one end of the transmission part, opposite to the first elastic part, and the pressing protrusion penetrates through the through hole and protrudes out of the accommodating cavity.

Further, the side wall of the transmission hole is protruded with a step part matched with the eccentric shaft, the step part comprises a plane and a transition surface connected to the adjacent inner wall of the transmission hole from the plane, the plane extends towards the direction away from the first elastic piece and is perpendicular to the inner wall of the transmission hole, and the cross section of the transition surface perpendicular to the rotating axial direction of the transmission part is arc-shaped.

Further, the cross section external contour of the eccentric shaft perpendicular to the axial direction is a closed ring shape with smooth edges, and the widest width direction of the cross section is perpendicular to the radial direction of the main shaft.

Further, the transmission compressing mechanism further comprises a limiting rebound part, and the limiting rebound part further comprises a first limiting structure fixed on the base body, a second limiting structure fixed on the transmission part and a second elastic piece with two ends respectively connected with the first limiting structure and the second limiting structure;

the second limiting structure is rotationally connected to the first limiting structure by taking the main shaft as an axial time needle direction, the first limiting structure is provided with a plurality of limiting sliding grooves with gradually shrinking widths in the time needle direction of the rotation of the second limiting structure around the main shaft, the second limiting structure is provided with a plurality of sliding blocks matched with the limiting sliding grooves, the sliding blocks have elasticity, and the width of the sliding blocks in the radial direction of the main shaft is larger than the minimum width of the limiting sliding grooves;

the second elastic piece is used for providing elastic force for the second limiting mechanism in the other clockwise direction around the axial direction of the main shaft.

Further, a plurality of limit sliding grooves are connected end to form a closed loop, the connecting parts of two adjacent limit sliding grooves form limit walls, and an included angle A between the limit walls and the side walls of the limit sliding grooves is larger than 90 degrees and smaller than 150 degrees.

Further, the transmission compressing mechanism further comprises a limiting piece rotationally connected to the base body, a limiting groove matched with the eccentric shaft is formed in the limiting piece, one end of the eccentric shaft penetrates through the limiting groove, and the whole body of the eccentric shaft is abutted to the inner wall of the limiting groove.

The limiting piece comprises a fixed cylinder, a movable part rotationally connected with the fixed cylinder and a key clamped with the movable part;

the base body is provided with a mounting hole matched with the fixing cylinder, and the fixing cylinder penetrates through the mounting hole and is fixed on the base body;

the movable part comprises a fixed column and a limiting block which is arranged at intervals with the fixed column, the fixed column penetrates through the fixed cylinder and rotates coaxially with the fixed cylinder, and the limiting block is provided with the limiting groove;

the key is used for enabling the movable part to rotate around the fixed cylinder shaft.

Compared with the prior art, the explosion-proof charger has the beneficial effects that:

An explosion-proof charger adopts a charging switch to cooperate with a charging interface to charge electronic equipment, on one hand, the surface of the charging interface is covered with a silica gel sleeve, the silica gel sleeve is protruded around a first convex ring and a second convex ring of a first fixing piece, the first convex ring and the second convex ring are insulating and elastic, when the charging port of the electronic equipment is plugged, a spring needle of the charging interface of the charger and a corresponding detection pin of the electronic equipment are accurately abutted, static electricity carried on the surface of the charging interface is avoided, and an explosion-proof effect is achieved.

On the other hand, the explosion-proof charger also adopts a charging switch for controlling the charging interface to be electrified, a second circuit board of the charging switch is electrically connected with a first circuit board of the charging interface, a pressing piece protruding out of the base body is pressed, and the pressing piece is abutted to a contact point of the second circuit board to enable the charging interface to be electrified. Compared with the prior art, the anti-explosion charger has the advantages that the electronic equipment is connected to the charging interface for instantaneous charging, the charging interface can be actively controlled to be electrified after the electronic equipment is connected to the charging interface, the current can be connected after the charger is ensured to be accurately connected with the electronic equipment, the instantaneous high current generated during charging is avoided, and the anti-explosion effect can be achieved.

Drawings

FIG. 1 is an exploded view of a first perspective of the overall structure of a charging interface in accordance with an embodiment of the present invention;

FIG. 2 is an exploded view of a second perspective of the overall structure of the charging interface in an embodiment of the present invention;

FIG. 3 is an exploded view of a portion of the structure of a charging interface in an embodiment of the invention;

FIG. 4 is a partial structural cross-sectional view of a charging interface in an embodiment of the invention;

FIG. 5 is a schematic view of a dust-proof assembly according to an embodiment of the present invention;

FIG. 6 is an exploded view of the overall structure of the charger in an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a charger in an embodiment of the present invention;

fig. 8 is an enlarged view of detail B in fig. 7;

FIG. 9 is a rear view of a moving part in an embodiment of the invention;

FIG. 10 is a rear view of a transmission component in an embodiment of the invention;

FIG. 11 is a schematic view of the structure of a moving part in an embodiment of the present invention;

FIG. 12 is a schematic view of a portion of a drive compression mechanism in accordance with an embodiment of the present invention;

FIG. 13 is a rear view of a first spacing structure in an embodiment of the present invention;

fig. 14 is an enlarged view of detail C in fig. 13;

FIG. 15 is a front view of a second spacing structure in an embodiment of the present invention;

FIG. 16 is a rear view of the front housing in an embodiment of the invention;

fig. 17 is an enlarged view of detail D in fig. 16;

FIG. 18 is an exploded view of a portion of the structure of an embodiment of the present invention;

FIG. 19 is a schematic view of the structure of a transmission component in an embodiment of the invention;

fig. 20 is a rear view of the handle in an embodiment of the invention.

FIG. 21 is a cross-sectional view of a charging interface in an embodiment of the invention;

fig. 22 is an enlarged view of detail E in fig. 21.

In the drawings, each reference numeral denotes: 10. a moving member; 110. a transmission member; 111. a transmission hole; 1111. a step part; 1111a, a plane; 1111b, transition surface; 112. pressing the bulge; 120. a fitting; 121. a first mounting arm; 122. a second mounting arm; 123. a third mounting arm; 124. an insulating support; 1241. an extension frame; 125. a wiring hole;

20. a transmission member; 210. a main shaft; 2211. a fixed block; 220. an eccentric shaft; 221. a first semicircular portion; 222. a second semicircular portion; 223. a limit part; 230. a fixing piece;

30. a trigger member; 310. a handle; 311. a fixing groove; 320. a gasket;

40. a base; 410. a top cover; 411. a positioning arm; 420. a front shell; 421. a through hole; 422. a limiting plate; 423. a protruding portion; 4231. a dust cover groove; 424. a surrounding part; 430. a rear case; 431. a fitting hole;

50. a charging switch; 510. a housing; 520. a second circuit board; 530. a pressing member;

60. A first elastic member;

70. a limiting piece; 710. a fixing part; 711. a first fixed cylinder; 712. a fixing nut; 713. a second fixed cylinder; 714. a fixing pin; 720. a movable part; 721. fixing the column; 7211. a first fixing column; 7212. a second fixing column; 7213. a third fixing column; 722. positioning columns; 723. a connecting arm; 724. a limiting block; 7241. a limit groove; 730. a key;

80. a limit rebound member; 810. a first limit structure; 811. limiting sliding grooves; 8111. a limiting wall; 820. a second limit structure; 821. a slide block; 8211. a limiting surface; 830. a second elastic member;

90. a charging interface; 910. a first fixing member; 911. a seat body part; 912. a plug-in part; 9121. a sleeve; 913. a silica gel sleeve; 9131. a first collar; 9132. a second convex ring; 9133. a third convex ring; 9134. a fixing hole; 914. a housing chamber; 920. a spring needle; 921. a fixed cylinder; 922. a PIN needle; 923. a first connection post; 924. a second connection post; 930. a first circuit board; 940. a dust-proof assembly; 941. a dust cover; 9411. sealing the groove; 942. a cover body rotating shaft; 9421. a limit protrusion; 9422. a rotating shaft portion; 9423. a connection part; 943. a fixed plug; 950. a second fixing member; 951. sealing grooves; 952. a sealing gasket; 953. and (5) assembling a column.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Examples:

in this embodiment, referring to fig. 1 to 22, an explosion-proof charger includes: a base body 40;

a charging interface 90 fixed to the base 40, the charging interface 90 including the base 40, a first fixing member 910, a plurality of spring pins 920, and a first circuit board 930;

the first fixing member 910 includes a base portion 911 fixed to the base 40 and a plugging portion 912 protruding from the base 40, and a silica gel sleeve 913 covers the surface of the first fixing member 910; the silica gel sleeve 913 is provided with a first convex ring 9131 protruding around the whole body of the plug-in part 912, and the silica gel sleeve 913 is provided with a second convex ring 9132 protruding around the edge of the base body part 911 and towards the direction away from the base body part 911;

the first circuit board 930 is fixed on the base 40 and is located at one side of the base 911 facing away from the plugging portion 912, one end of the spring needle 920 is fixed on the first fixing member 910 and protrudes out of the first fixing member 910 towards the direction facing away from the base 911, and the other end of the spring needle 920 is connected to the first circuit board 930;

The charging switch 50 is movably connected to the base 40, the charging switch 50 includes a second circuit board 520 electrically connected to the first circuit board 930 and a pressing member 530 movably connected to the second circuit board 520, the pressing member 530 is configured to linearly move relative to the second circuit board 520 and abut against a contact point of the second circuit board 520 to enable the charging interface 90 to be electrified, and the base 40 is provided with a through hole 421 for enabling the pressing member 530 to pass along a linear movement direction of the pressing member 530.

Specifically, in this embodiment, as shown in fig. 1-2, the base 40 includes a front shell 420 and a rear shell 430 that are disposed at intervals and are connected at edges, the front shell 420 of the base 40 protrudes toward one end away from the rear shell 430 to form a protruding portion 423, the front shell 420 further includes a surrounding portion 424 that is close to the rear shell 430 and is connected to the protruding portion 423, the protruding portion 423 and the surrounding portion 424 enclose a receiving cavity with an opening at the bottom, the receiving cavity is used for receiving the first fixing member 910, the plurality of spring pins 920 and the circuit board, the first fixing member 910 is partially received in the receiving cavity, the plugging portion 912 of the first fixing member 910 protrudes toward the direction away from the opening of the receiving cavity to form a protruding portion 423, the base portion 911 of the first fixing member 910 is received in the receiving cavity, and the circuit board is received in the receiving cavity.

The first fixing member 910 and the circuit board enclose to form a first accommodating cavity 914, a projection of the plugging portion 912 towards the base portion 911 is located in the base portion 911, and the plugging portion 912 is used for matching with a charging port of the electronic device. The first fixing member 910 is covered with an integrally formed silica gel sleeve 913 around the body and towards the detection foot direction of the electronic device. The ten spring PINs 920 are divided into two rows and uniformly arranged on the first fixing piece 910 in an array manner, and are partially accommodated in the first accommodating cavity 914, the spring PINs 920 are arranged perpendicular to the circuit board along the axial direction, the PIN PINs 922 which are telescopic to the spring PINs 920 protrude out of the inserting part 912, and the top surfaces of the inserting parts 912 which protrude out of the spring PINs 920 are arranged on the circuit board in parallel.

An inserting port matched with the first fixing piece 910 is recessed inwards at one end of the electronic equipment, an annular inserting wall protruding towards the opening direction of the inserting port is arranged in the center of the inserting port, the annular inserting wall is enclosed to form a connecting area, and detection pins matched with the spring pins 920 are arranged in an array mode in the connecting area. When the first fixing member 910 is inserted into the insertion port, the base portion 911 is closely attached to the inner wall of the insertion port, the insertion portion 912 is closely attached to the inner wall of the annular insertion wall, the spring pins 920 are abutted against the corresponding detection pins, and the surface of the insertion portion 912 away from the base portion 911 is spaced from the bottom of the insertion port by a distance that the spring pins 920 stretch. As an example, two detection pins EN in the electronic device are connected to corresponding two pogo pins 920 in the charging interface 90, and signals are transmitted to a circuit board connected to the other end of the pogo pins 920, and the circuit board controls the electronic device to be connected to a charging power source.

The charging switch 50 comprises a housing 510, a second circuit board 520 fixed on the housing 510, and a pressing piece 530 movably connected to the housing 510 along the linear movement direction of the moving component 10, wherein the pressing piece 530 protrudes out of an opening of the base 40 corresponding to the projection position of the charging switch 50 in the linear movement direction, a contact point is arranged on one side of the circuit board facing the pressing piece 530, and the pressing piece 530 is used for moving upwards to be abutted against the contact point so as to communicate with a charger circuit.

First, first bulge loop 9131 is used for realizing the waterproof in the direction between interface 90 and the electronic equipment detection foot that charges, and second bulge loop 9132 is used for realizing the waterproof in the other direction between interface 90 and the electronic equipment detection foot that charges, and first bulge loop 9131 and second bulge loop 9132 make the electronic equipment charge and form airtight space between interface 90 that charges, and in the charging process, spring needle 920 holds in airtight space, prevents external liquid and dust adhesion to spring needle 920 and detection foot department, has reduced contact failure and circuit failure because of the environment, provides the interface 90 that charges that is adapted to under the complex industrial production environment, has further played the explosion-proof effect.

Second, the first and second collars 9131 and 9132 define a direction in which the charging port of the electronic device is inserted, so that the pogo pin 920 can be precisely abutted to the detecting pin, and an electric spark generated by poor contact between the pogo pin 920 and the detecting pin is avoided.

Again, the first bulge loop 9131 and the second bulge loop 9132 are silica gel materials, have certain elasticity, can the interference insert electronic equipment mouth that charges to produce frictional force with the electronic equipment mouth that charges between, slow down the access speed of electronic equipment and interface 90 that charges, prevent static and quick grafting the electric spark that produces, and then played explosion-proof effect.

Finally, the charging interface 90 must be controlled by the charging switch 50 to be electrified, so that the charger and the electronic equipment can be ensured to be accurately connected and then connected with current, instant large current generated during charging is avoided, and an explosion-proof effect can be achieved.

Further, the base body 40 is provided with a mounting hole matched with the base body 911, the inner wall of the mounting hole is provided with a mounting ring groove, and the silica gel sleeve 913 is provided with a third convex ring 9133 matched with the mounting ring groove around the whole body of the base body 911.

Specifically, as shown in fig. 1-5 and 21-22, in this embodiment, the annular surface of the base body portion 911 of the first fixing member 910 towards the plugging portion 912 is flush with the top surface of the front shell 420 of the base body 40, the top surface of the front shell 420 is provided with a mounting hole matched with the base body portion 911, and the third convex ring 9133 can be tightly connected with the mounting ring groove, so that the base body 40 and the first fixing member 910 are sealed, water and dust are prevented from entering the base body 40 through the gap between the base body 40 and the first fixing member 910, the first circuit board 930 of the charging interface 90 can be protected, the first circuit board 930 is not interfered by impurities in the charging process, and the functions of explosion prevention and circuit protection are achieved.

Further, the first fixing member 910 is formed by extending a plurality of sleeves 9121 from the plugging portion 912 toward the first circuit board 930, one end of the sleeve 9121 protrudes from the plugging portion 912, the silica gel sleeve 913 is provided with a plurality of fixing holes 9134 corresponding to the plurality of sleeves 9121, and the spring needle 920 is closely connected in the sleeve 9121.

Specifically, as shown in fig. 3 and 22, in the present embodiment, ten sleeves 9121 are integrally formed in the direction of the first circuit board 930 in the plugging portion 912, the sleeves 9121 are matched with the pogo pins 920, the sleeves 9121 include a first sleeve 9121 and a second sleeve 9121 which are sequentially connected, the first sleeve 9121 protrudes from the top surface of the plugging portion 912 toward the electronic device detecting pin, and the second sleeve 9121 extends from the plugging portion 912 toward the first circuit board 930. The spring pin 920 is partially tightly connected to the second sleeve 9121, and one end of the spring pin protrudes out of the first sleeve 9121, and the silica gel sleeve 913 attached to the top surface of the plugging portion 912 is provided with a fixing hole 9134 corresponding to the first sleeve 9121.

The sleeve 9121 is used for fixing the spring needle 920 and limiting the axial direction of the spring needle 920, so that the axial direction of the spring needle 920 is the plugging direction of the charging interface 90 and the charging port of the electronic device, the close contact between the spring needle 920 and the sleeve 9121 can also prevent dust and water from entering the accommodating cavity 914 through the sleeve 9121, circuit faults such as circuit sparks and the like caused by dust and liquid of the first circuit board 930 are reduced, the service life of the first circuit board 930 is prolonged, the charging safety of the electronic device is protected, and the explosion-proof performance of the explosion-proof charger is improved.

Further, the pogo PIN 920 includes a fixed cylinder 921 coaxially disposed and a PIN 922 telescopically disposed at one end of the fixed cylinder 921; the outer wall of the fixing barrel 921 is in interference fit in the sleeve 9121, and the PIN 922 is connected to one end of the sleeve 9121 away from the first circuit board 930 in a telescopic manner.

Specifically, as shown in fig. 22, in the present embodiment, the outer wall of the fixing barrel 921 is interference-fitted to the second sleeve 9121, and the pin 922 is telescopically coupled to the first sleeve 9121. The fixing cylinder 921 is used to give the PIN 922 elastic force in the axial direction. The PIN 922 is used for plugging with a detection PIN in the electronic device, and after plugging, the first circuit board 930 sends a control instruction to the first circuit board 930, so that the electronic device can be charged. The first sleeve 9121 has a smaller diameter than the second sleeve 9121, and the fixed cylinder 921 has a larger inner diameter than the first sleeve 9121.

On the one hand, the spring needle 920 can be axially fixed, on the other hand, the smaller cylinder diameter of the second sleeve 9121 can further prevent dust and water from entering the accommodating cavity 914, so that the first circuit board 930 is protected, and the explosion-proof performance of the explosion-proof charger is improved.

Further, the pogo pin 920 further includes a first connection post 923 and a second connection post 924 coaxially and sequentially connected with the fixing cylinder 921, the first connection post 923 being abutted between the first circuit board 930 and the fixing cylinder 921; the second connection posts 924 are disposed through the first circuit board 930.

Specifically, as shown in fig. 22, in the present embodiment, the fixing cylinder 921, the first connection post 923, and the second connection post 924 are coaxially connected in sequence, and the inner diameter of the first connection post 923 is larger than the inner diameter of the first sleeve 9121, which enables the first connection post 923 to abut between 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 connection post 924 of the pogo pin 920, and the second connection post 924 is used to fix the pogo pin 920 with the first circuit board 930. The spring needle 920 can be stably accommodated in the accommodating cavity 914, so that the movement of the spring needle 920 along the axial direction is further limited, and the spring needle 920 is prevented from falling off or shifting. Meanwhile, the first connection post 923 is abutted between the fixed barrel 921 and the first circuit board 930, so that water and dust cannot interfere with the use safety problem of the first circuit board 930 in the accommodating cavity 914, and the explosion-proof effect is further achieved.

Preferably, the first fixing member 910 is made of hard plastic.

Specifically, the first fixing member 910 is made of hard rubber, and friction force between the first fixing member 910 and the spring needle 920 is large, so that the first fixing member 910 and the silica gel sleeve 913 can be tightly attached together, firmness of the silica gel sleeve 913 is guaranteed, and the sleeve 9121 and the spring needle 920 can be tightly attached together. At the same time, the hard plastic material is also an insulating part, so that the spring needle 920 of the metal is prevented from being damaged by friction with the first fixing member 910 or generating sparks. Further ensuring the tightness between the charging interface 90 and the detection pin of the electronic equipment and preventing dust, water and electric spark from affecting the charging of the electronic equipment.

Further, the charging interface 90 further includes a dust-proof component 940 rotatably connected to the base 40, the dust-proof component 940 includes a dust-proof cover 941 closely attached to the outside of the silica gel sleeve 913, and the dust-proof cover 941 is provided with a sealing groove 9411 matching the first collar 9131.

Specifically, as shown in fig. 1 and 2, in the present embodiment, the dust cap 941 is rotatably connected to the base 40 at one end, and a sealing groove 9411 is provided at the other end to match the first collar 9131. The dust cap 941 is used for forming airtight space between the first fixing member 910 in the uncharged state, so as to prevent the PIN 922 of the spring needle 920 from being directly exposed to air, and prevent dust and liquid from entering the accommodating cavity 914 along the sleeve 9121.

Further, the base 40 is provided with a dust cap 941 groove 4231 which is matched with the dust cap 941 at intervals with the dust cap 940;

the dust-proof assembly 940 further includes a cover rotating shaft 942 rotatably connected to the base 40, one end of the cover rotating shaft 942 is connected to the dust-proof cover 941, and the cover rotating shaft 942 is disposed through one end of the dust-proof cover 941 slot 4231 near the first fixing member 910; one end of the cover rotating shaft 942 far away from the dust cover 941 is provided with a limiting protrusion 9421, and the limiting protrusion 9421 is used for limiting the moving stroke of the cover rotating shaft 942 towards the direction of the base 40.

Specifically, as shown in fig. 1 and 5, in the present embodiment, the dust-proof assembly 940 further includes a fixing plug 943 protruding from the base 40. The cover rotating shaft 942 includes a rotating shaft portion 9422 penetrating through the slot 4231 of the dust cover 941 and close to one end of the first fixing member 910, and a connecting portion 9423 integrally formed at one end of the rotating shaft portion 9422, where the connecting portion 9423 is in interference fit with the dust cover 941, and the connecting portion 9423 has a fixing hole 9134 axially provided along the cover rotating shaft 942, and the fixing plug 943 penetrates through the fixing hole 9134. The rotating shaft portion 9422 can drive the connecting portion 9423 to move along the rotating shaft in a direction away from the base 40, and during moving, the fixing hole 9134 is separated from the fixing plug 943, and the dust cover 941 is away from the first fixing member 910. The end of the rotating shaft portion 9422 away from the dust cover 941 is provided with a limiting protrusion 9421, and the limiting protrusion 9421 is used for limiting the moving stroke of the cover rotating shaft 942 in the direction away from the base 40, preferably, the maximum moving stroke of the cover rotating shaft 942 is the height of the PIN 922 from the surface of the base 40 along the axial direction. When the cover rotating shaft 942 moves to the maximum stroke in the direction away from the base 40, the cover rotating shaft 942 is rotated 180 ° and then the cover rotating shaft 942 moves to the direction close to the base 40 to insert the groove 4231 of the dust cover 941, thus completing the installation and removal of the dust cover 941. The cover rotating shaft 942 enables the dust cover 941 to be detachably mounted on the first fixing member 910 by rotating the connecting base 40, so that the charging interface 90 can be conveniently switched from an unused state to a to-be-used state on the basis of effectively protecting the charging interface 90.

Further, the charging interface 90 further includes a second fixing member 950 fixed to a side of the first circuit board 930 facing away from the first fixing member 910, the second fixing member 950 is provided with a sealing groove 951 opened toward the first circuit board 930, and a projection of the spring needle 920 toward the second fixing member 950 is located in the sealing groove 951. Preferably, a gasket 952 is provided between the sealing groove 951 and the first circuit board 930.

Specifically, as shown in fig. 3 and 22, one end of the second fixing member 950 is fixed to the first circuit board 930, and the edge of the second fixing member 950 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 protruding portion of the front case 420 by screws, the accommodating cavity is formed by enclosing the second fixing member 950, the protruding portion of the front case 420, and the enclosing portion 424 of the front case 420, the assembly post 953 is integrally formed and protruding from the second fixing member 950 in a direction away from the first circuit board 930, the assembly hole 431 matching with the assembly post 953 is formed in the bottom surface of the rear case 430, and the assembly post 953 is inserted into the assembly hole 431.

A closed space is formed between the sealing groove 951 and the first circuit board 930, the sealing gasket 952 can enable the sealing performance of the contact part between the sealing groove 951 and the first circuit board 930 to be better, water and dust are prevented from entering a gap between the sealing groove 951 and the first circuit board 930, short circuit or other influences are caused on the first circuit board 930 and the spring needle 920 penetrating through the first circuit board 930, the function of protecting the charging interface 90 can be finally achieved, the charging safety of electronic equipment is guaranteed, and the explosion-proof performance of an explosion-proof charger is improved.

Further, the explosion-proof charger still includes transmission hold-down mechanism, and transmission hold-down mechanism includes:

a transmission part 20 rotatably coupled to the base body 40, the transmission part 20 including a main shaft 210 and an eccentric shaft 220 eccentrically disposed at the main shaft 210;

the moving part 10 is movably connected with the base body 40, the moving part 10 is provided with a transmission hole 111, an eccentric shaft 220 penetrates through the transmission hole 111, and the moving part 10 is used for linearly moving along with the rotation of the transmission part 20; the charging switch 50 is fixed on the moving member 10, and the linear movement direction of the pressing member 530 is the same as the linear movement direction of the moving member 10;

a first elastic member 60 connected between the base 40 and the moving member 10, the first elastic member 60 for providing a force for preventing the moving member 10 from moving linearly;

the triggering component 30 is connected to the transmission component 20, and the triggering component 30 is used for driving the transmission component 20 to rotate in a time needle direction by taking the spindle 210 as an axial direction.

Specifically, in the present embodiment, as shown in fig. 6, the base 40 further includes a top cover 410, and the top cover 410, the front case 420 and the rear case 430 enclose an accommodating space of the transmission compressing mechanism. The transmission part 20 and the moving part 10 are accommodated in the accommodating space, the main shaft 210 of the transmission part 20 protrudes out of the accommodating space, and the triggering part 30 is positioned outside the accommodating space and one end of the triggering part is connected to the main shaft 210, so that the movement of the transmission shaft in the three-dimensional direction in the accommodating space is limited, the transmission shaft is fixed on the base body 40, and the transmission shaft can rotate around the main shaft 210 in any time needle direction.

The top cover 410 protrudes vertically downwards to form two positioning arms 411, the moving member 10 is slidably connected to the two positioning arms 411, specifically, the moving member 10 is located between the two positioning arms 411, two opposite sides of the moving member 10 abut against the two positioning arms 411, and the positioning arms 411 are used for limiting the movement of the moving member 10 in the horizontal direction.

The front case 420 has a through hole 421 formed at a projection of the moving member 10 in the linear moving direction, and the moving member 10 can partially protrude out of the accommodating space through the through hole 421 and abut against the electronic device outside the base 40, so as to cooperate with the first elastic member 60 to achieve a compressing effect.

The main shaft 210 is a transmission shaft of the transmission pressing mechanism, and the radius of the main shaft 210 is uniformly reduced towards the length extending direction. One end of the triggering component 30 is connected to the main shaft 210, and one end of the triggering component 30 away from the main shaft 210 is used for applying force and driving the transmission component 20 to rotate in the axial direction of the main shaft 210, and the eccentric shaft 220 rotates in the time needle direction of the main shaft 210 and drives the moving component 10 to linearly move.

The transmission part 20 further comprises a fixing piece 230 connected between the main shaft 210 and the eccentric shaft 220, an inclined plane gradually reducing along the length extending direction is formed between the eccentric shaft 220 and the fixing piece 230, an arc-shaped interface can be arranged between the fixing piece 230 and the eccentric shaft 220 by the inclined plane, noise of the transmission part 20 and the moving part 10 in the moving process is reduced, abrasion among parts of the transmission compressing mechanism is reduced, the service life of the transmission compressing mechanism is prolonged, and the use experience of a user is optimized.

The casing 510 of the charging switch 50 is fixed to the moving member 10 and is used for moving along the linear moving direction of the moving member 10, the second circuit board 520 is fixed to the casing 510 and is used for moving along the linear moving direction of the moving member 10, the pressing member 530 is movably connected to the casing 510, and the second circuit board 520 is spaced from the pressing member 530.

As an example, when no external force is applied to the triggering member 30 to drive the transmission member 20 to rotate, the moving member 10 partially penetrates through a through hole 421, and the transmission pressing mechanism is in an initial pressing state.

An external force for driving the transmission component 20 to rotate is applied to the triggering component 30, so that the transmission component 20 rotates 90 degrees by taking the main shaft 210 as an axial direction, the eccentric shaft 220 penetrates through the transmission hole 111 of the moving component 10, the moving component 10 converts the rotary motion of the transmission component 20 into linear motion, the moving component 10 moves in a direction far away from a through hole 421 until the transmission component is completely accommodated in the accommodating space, and the transmission pressing mechanism is in a pre-pressing state. Meanwhile, the housing 510 of the charging switch 50 moves linearly with the moving member 10 so that the charging switch 50 is completely accommodated in the accommodating space.

The first elastic member 60 can provide an elastic force for preventing the moving member 10 from moving away from the through hole 421 when the trigger member 30 stops applying an external force for driving the transmission member 20 to rotate, and the moving member 10 moves toward the through hole 421 by the elastic force provided by the first elastic member 60, so that the transmission pressing mechanism returns to an initial pressing state. Meanwhile, the housing 510 of the charging switch 50 moves linearly with the moving member 10, and the pressing piece 530 protrudes out of the receiving space. If the explosion-proof charger is assembled with the electronic device, one end of the pressing member 530 abuts against the electronic device and moves toward the second circuit board 520 to abut against the second circuit board 520.

When the anti-explosion charger is applied to the anti-explosion charger, on one hand, the transmission pressing mechanism is used for pressing and fixing the electronic equipment, so that the detection pin of the charging port of the electronic equipment is accurately in butt joint with the charging port 90; on the other hand, the transmission component 20 of the transmission compressing mechanism has a simple structure, the main shaft 210 and the eccentric shaft 220 can enable the moving component 10 to reach the maximum moving distance in the shortest rotating stroke, the operation is labor-saving and simple and convenient, the whole occupied space of the transmission compressing mechanism is small, materials are further saved, the manufacturing cost is reduced, when the transmission compressing mechanism is applied to an electronic device charger, a user can quickly fix and compress the electronic device and actively control the opening and closing of the charging switch 50, and then the charging interface 90 and the charging switch 50 are connected through the electronic device, so that the charging interface 90 is electrified to charge the electronic device, the explosion-proof charger has an explosion-proof effect, and the electronic device charger is safer and more reliable.

Further, as shown in fig. 8 to 12, the moving member 10 includes a transmission member 110, one end of the transmission member 110 opposite to the first elastic member 60 is provided with a pressing protrusion 112, and the pressing protrusion 112 is disposed through a through hole 421 and protrudes out of the accommodating space. The electronic equipment outside the matrix 40 is provided with a groove matched with the pressing protrusion 112, and in the initial pressing state, the pressing protrusion 112 can be arranged in the groove of the electronic equipment in a penetrating manner, so that the electronic equipment can be pressed quickly.

Further, as shown in fig. 9, the sidewall of the driving hole 111 is protruded with a stepped portion 1111 matching with the eccentric shaft 220, the stepped portion 1111 includes a plane 1111a and a transition surface 1111b connected from the plane 1111a to the inner wall of the adjacent driving hole 111, the plane 1111a extends toward the direction away from the first elastic member 60 and is perpendicular to the inner wall of the driving hole 111, and a cross section of the transition surface 1111b perpendicular to the axis direction of rotation of the driving member 20 is arc-shaped.

The cross section of the transition surface 1111b perpendicular to the axial direction of the main shaft 210 includes an arc and a curve with a radius R2, which are sequentially connected: r1=2: 1, the other end of the curve is connected to a 1/4 circle with a radius R1, and a circle formed by an arc with a radius R2 in the transition surface 1111b1111b can intersect with the inner wall of the transmission hole 111 far from the pressing protrusion 112.

The step 1111 is opposite to the eccentric shaft 220 after rotating 90 ° with the spindle 210 as the axial direction, firstly, the step 1111 can play a role in limiting the rotation stroke of the transmission component 20, secondly, the plane 1111a extending from the side wall of the transmission hole 111 towards the compression boss 112 in the step 1111 and the transition surface 1111b connected to the inner wall of the adjacent transmission hole 111 can also increase the rising distance of the moving component 10 after the transmission component 20 rotates for a fixed stroke, so that the user is more labor-saving, the effect of rapidly compressing and fixing the electronic device by using the transmission compressing mechanism can be achieved, finally, the cross section of the step 1111 perpendicular to the axis direction of the spindle 210 is arc-shaped and curve-shaped, the noise generated by the eccentric shaft 220 and the transmission hole 111 in the rotation process is smaller, the rotation motion of the transmission mechanism is further converted into the linear motion of the moving component 10 to be smoother, the use experience of the transmission compressing mechanism is improved, and the opening process of the charging switch 50 is smoother.

Further, as shown in fig. 10 and 19, the outer contour of the cross section of the eccentric shaft 220 perpendicular to the axial direction thereof is a closed ring shape with smooth edges, and the widest width direction of the cross section is perpendicular to the radial direction of the main shaft 210.

Specifically, in the present embodiment, as shown in fig. 5, the closed ring shape includes two ellipses sharing a main diameter α, the main diameter α is set along the widest width direction of the closed ring shape cross section, the length of the shorter axis β of the ellipse close to the axis of the main shaft 210 is smaller than the main diameter α, and the longer axis γ of the ellipse away from the axis of the main shaft 210 is greater than or equal to the main diameter α, β+γ < α. Preferably, 1.ltoreq.γ: alpha is less than or equal to 1.2. As an example, β: α=0.5, γ: α=1.125.

The parameter gamma of two closed annular ellipses is larger than or equal to alpha and larger than beta, the ellipse eccentricity close to the axis of the main shaft 210 is larger, the ellipse is flatter, the ellipse eccentricity far away from the axis of the main shaft 210 is smaller, the ellipse approaches to a circle, correspondingly, the eccentric shaft 220 comprises a first semicircular part 221 close to the axis of the main shaft 210 and a second semicircular part 222 far away from the axis of the main shaft 210, compared with the eccentric shaft 220 with a right circular cross section, when the rotating stroke is the same, the ratio of the short shaft beta to the length of the main diameter alpha is smaller, the first semicircular part 221 can drive the moving part 10 to linearly move more, the space required by the operation of a transmission mechanism is further saved, by the arrangement, a user can save labor, the occupied volume of the transmission pressing mechanism is smaller, and the transmission pressing mechanism can be used for pressing fixed electronic equipment and opening the charging switch 50 for charging.

Preferably, the rotation angle of the transmission part 20 is optimally 0 to 90 °, and the arrangement of the minor axis of the semi-elliptical portion along the radial direction of the main shaft 210 can maximize the movement distance of the moving part 10 in the vertical direction when the eccentric shaft 220 rotates 90 ° around any one of the main shafts 210. Compared with the cliff cam design in the related art, the eccentric shaft 220 with the oval cross section has small noise, smooth movement process, strong flexibility and better use experience.

In other embodiments, a plane 1111a may be further disposed at the abutting position of the eccentric shaft 220 and the moving component 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 in transition through an arc surface, so as to further improve the use experience of the eccentric shaft 220 during movement and rest.

Further, as shown in fig. 8 and 11, the moving part 10 further includes a fitting 120 spaced apart from the transmission member 110 in a direction perpendicular to a length extension direction of the transmission hole 111, the fitting 120 being for mounting the charge switch 50, the fitting 120 including a first fitting arm 121, a second fitting arm 122 and a third fitting arm 123 connected in sequence, the second fitting arm 122 having a length extension direction perpendicular to the length extension direction of the transmission hole 111, the first fitting arm 121 and the third fitting arm 123 being disposed in parallel and having the same length extension direction. The first and third fitting arms 121 and 123 are symmetrically provided with mounting grooves matched with the charge switch 50. The charging switch 50 is fixedly connected to the first assembly arm 121 and the third assembly arm 123 through two ends of the mounting groove, the charging switch 50 is a push switch and is accommodated in the accommodating space, the base body 40 is provided with an opening corresponding to the projection position of the charging switch 50 in the linear moving direction, and the charging switch 50 is partially protruded out of the opening.

The moving part 10 further includes an insulating bracket 124, the second fitting arm 122 is protruded with a plurality of positioning blocks in an extending direction away from the lengths of the first and third fitting arms 121 and 123, and as an example, the second fitting arm 122 is symmetrically protruded with two positioning blocks. The insulating support 124 is wrapped outside each positioning block, the insulating support 124 extends from the surface of one positioning block to the adjacent other positioning block to form an extension frame 1241, and a wiring hole 125 is formed between the insulating support 124 and the extension frame 1241 on the surfaces of the two adjacent positioning blocks, and the wiring hole 125 is used for allowing a connecting wire of the charging switch 50 on the assembly 120 to pass through. The wiring hole 125 can enable the connecting wire of the charging switch 50 to be connected to other circuits in order, and the insulating support 124 has good insulating performance, so that the charging switch 50 or the connecting wire of the charging switch 50 is prevented from being leaked to bring electric shock risks to a user of the transmission tightening mechanism.

Further, as shown in fig. 6 and 13 to 15, the transmission compressing mechanism further includes a limiting resilient member 80, where the limiting resilient member 80 further includes a first limiting structure 810 fixed on the base 40, a second limiting structure 820 fixed on the transmission member 20, and a second elastic member 830 with two ends respectively connected to the first limiting structure 810 and the second limiting structure 820.

The second limiting structure 820 is rotatably connected to the first limiting structure 810 by taking the main shaft 210 as an axial direction of a time needle, the first limiting structure 810 is provided with a plurality of limiting sliding grooves 811 with gradually shrinking widths in the time needle direction of the rotation of the second limiting structure 820 around the main shaft 210, the second limiting structure 820 is provided with a plurality of sliding blocks 821 matched with the limiting sliding grooves 811, the sliding blocks 821 have elasticity, and the width of the sliding blocks 821 in the radial direction of the main shaft 210 is larger than the minimum width of the limiting sliding grooves 811.

The second elastic member 830 is used for providing elastic force to the second limiting mechanism in the other clockwise direction around the axial direction of the spindle 210.

Specifically, as shown in fig. 12-15, in the present embodiment, the limiting rebound member 80 is accommodated in the accommodating space, one end of the main shaft 210 is penetrated through the first limiting structure 810, the first limiting structure 810 and the main shaft 210 are coaxially provided with three limiting sliding grooves 811 sequentially connected to form sliding grooves, the three limiting sliding grooves 811 gradually shrink along the width of the second limiting structure 820 in the moving direction, the lengths of the three limiting sliding grooves 811 are equal, the second limiting structure 820 is provided with three sliding blocks 821 corresponding to the sliding grooves at uniform intervals, the cross section of the sliding blocks 821 is hexagonal, and two opposite side walls of the hexagonal sliding blocks 821 are abutted against the walls of the limiting sliding grooves 811.

The limiting rebound structure plays a limiting role in the rotation angle of the transmission part 20 of the transmission pressing mechanism by arranging the first limiting structure 810 and the second limiting structure 820 rotationally connected to the first limiting structure 810. Wherein, the limit sliding groove 811 with gradually-contracted width can form resistance limit, so that the sliding block 821 is in smart interference fit with the limit sliding groove 811, and the limit rebound structure is a rotation limit structure with a simplified structure. After the transmission part 20 in the transmission compressing mechanism rotates to a certain angle, a user can also keep the transmission compressing mechanism in a pre-compression state without applying external force to the trigger assembly, so that the user can further conveniently compress the electronic equipment by using the transmission compressing mechanism, the two ends of the charging switch 50 are respectively abutted to contact points of the electronic equipment and the second circuit board 520, the operation steps of the transmission compressing mechanism are simplified, the power is saved, the charging switch 50 can be started conveniently and rapidly, the charging interface 90 is ensured to be stably connected with a charging port of the electronic equipment, sparks generated by instant charging are avoided, and the explosion-proof charger is safer and more reliable.

Preferably, the width of the sliding block 821 is equal to the maximum width of the limit sliding groove 811, the width of the limit sliding groove 811 is gradually reduced, when the width between the opposite sides of the hexagonal sliding block 821 is equal to the maximum width of the limit sliding groove 811, the larger the stroke of the second limit structure 820 rotating around the direction of the hour hand is, the larger the friction between the limit sliding groove 811 and the sliding block 821 is when the distance between the sliding block 821 and the next limit sliding groove 811 is closer, and the larger the force that the user needs to apply to the trigger member 30 is, whereas the larger the stroke of the second limit structure 820 rotating around the other hour hand is, the easier.

In other embodiments, the width of the sliding block 821 may be slightly larger than the maximum width of the limit groove 811 within the allowable range of elastic deformation of the sliding block 821, so long as the sliding block 821 can withstand the maximum elastic deformation.

The second elastic member 830 is a torsion spring. When an external force is applied to the trigger component 30 to drive the second limiting structure 820 to rotate in a direction of a time needle with the spindle 210 as an axial direction, the width of the limiting chute 811 gradually shrinking can enable the second limiting structure 820 to rotate in the direction of the spindle 210 as an axial direction, the sliding block 821 receives a gradually increasing extrusion force from the wall of the limiting chute 811, and since the sliding block 821 has elasticity, the width of the sliding block 821 in the radial direction of the spindle 210 is larger than the minimum width of the limiting chute 811, and the sliding block 821 can move from one limiting chute 811 to the maximum width of the next limiting chute 811. Then, since the second elastic member 830 can provide the second limiting structure 820 with a force rotating in another clockwise direction with respect to the first limiting structure 810 with respect to the spindle 210, the sliding block 821 of the second limiting structure 820 can abut against the maximum width of the next limiting chute 811 when the external force stops being applied to the trigger member 30. Finally, the trigger member 30 is biased in the other clockwise direction about the spindle 210, so that the slider 821 of the second stopper 820 returns to the original stopper groove 811, and at this time, the biasing of the trigger member 30 is stopped, and the second stopper 820 can return to the original position by the elastic force of the second elastic member 830. The second elastic member 830 can function to assist in maintaining the limit state of the limit rebound structure and can function to release the limit state of the limit rebound structure.

Preferably, the second limiting structure 820 is made of rubber, which is a high elastic polymer material with reversible deformation, and has elasticity at room temperature, and can generate larger deformation under the action of small external force, and can recover after the external force is removed, and the sliding block 821 of the second limiting structure 820 can slide in the limiting sliding groove 811 of the first limiting structure 810 in an interference manner by utilizing the characteristic of rubber. Moreover, in the transmission hold-down mechanism, the second limiting structure 820 adopts rubber materials to avoid spark generated by rotation of the first limiting structure 810 made of metal materials, and the rubber materials are high in wear resistance, so that friction loss between the second limiting structure 820 and the first limiting structure 810 is greatly reduced, and the service life of the limiting rebound structure can be prolonged. In other embodiments, the second limiting structure 820 may be made of metal, and a rubber layer with a certain thickness is disposed on the surface.

Further, the plurality of limit sliding grooves 811 are connected end to form a closed loop, the connection parts of the two adjacent limit sliding grooves 811 form a limit wall 8111, and an included angle A between the limit wall 8111 and the side wall of the limit sliding groove 811 is larger than 90 degrees and smaller than 150 degrees.

Specifically, in the present embodiment, as shown in fig. 13 to 14, two ends of the plurality of limit sliding grooves 811 are sequentially connected, a limit wall 8111 is formed by inward folding of the groove walls at the connection positions of the plurality of limit sliding grooves 811, and the sliding block 821 is provided with a limit surface 8211 matched with the limit wall 8111. Two adjacent side surfaces of the hexagonal sliding block 821 form two limit surfaces 8211 matched with the limit wall 8111. The limiting surface 8211 utilizes the inclined plane cooperation design, has realized the resistance spacing of inclined plane, can cooperate the elastic component to make spacing resilience structure keep spacing state.

As an example, the included angle a is 124 °, and the included angle a of the retraction of the limiting wall 8111 is an angle between the limiting wall 8111 and a cross section of the end of the limiting chute 811 near the limiting wall 8111 along the width direction. When the second limiting structure 820 rotates around the transmission shaft in a clockwise direction, if the angle of the included angle a between the limiting wall 8111 and the side wall of the limiting chute 811 is larger than 150 degrees, the limiting effect is poor, and if the angle of the included angle a between the limiting wall 8111 and the side wall of the limiting chute 811 is smaller than 90 degrees, the rotation of the second limiting structure 820 in the clockwise direction is irreversible, and cannot rebound to the initial state. The angle range of the included angle A between the side walls of the limiting wall 8111 and the limiting chute 811 is 90-150 degrees, so that the resistance limiting and automatic rebound functions of the limiting rebound structure are better realized.

It should be noted that the number and length of the limit sliding grooves 811 are related to the rotation angle of the transmission member 20 to be limited, and those skilled in the art can design the position and number of the limit sliding grooves 811 and the corresponding sliding blocks 821 according to different requirements. In other embodiments, the stop wall 8111 may also be a stop tab 9421 protruding within the slot wall.

Further, the driving pressing mechanism further comprises a limiting piece 70 rotatably connected to the base body 40, a limiting groove 7241 matched with the eccentric shaft 220 is formed in the limiting piece 70, one end of the eccentric shaft 220 penetrates through the limiting groove 7241, and the whole eccentric shaft 220 abuts against the inner wall of the limiting groove 7241.

Specifically, as shown in fig. 18, in the present embodiment, the stopper 70 includes a fixed cylinder 921, a movable portion 720 rotatably connected to the fixed cylinder 921, and a lock key 730 engaged with the movable portion 720;

the base body 40 is provided with a mounting hole matched with the fixing barrel 921, and the fixing barrel 921 is penetrated through the mounting hole and fixed on the base body 40;

the movable part 720 comprises a fixed column 721 and a limiting block 724 which is arranged at intervals with the fixed column 721, the fixed column 721 penetrates through the fixed column 921 and rotates coaxially with the fixed column 921, and the limiting block 724 is provided with a limiting groove 7241;

the lock key 730 is used to rotate the movable portion 720 about the fixed cylinder 921 axis.

The limiting member 70 is spaced 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 penetrating the limiting groove 7241 in a direction away from the main shaft 210. The two adjacent sides of the limiting part 223, which are close to the limiting groove 7241, are abutted against the inner wall of the limiting groove 7241, so that the rotation of the transmission component 20 can be limited. The stopper 223 is projected axially along the main shaft 210 into the eccentric shaft 220, and the eccentric shaft 220 abuts against a surface of the stopper 70 on the side facing the main shaft 210. When the transmission compressing mechanism is in an initial compressing state, the limiting piece 70 rotates in a time needle direction, the limiting groove 7241 is close to the eccentric shaft 220, the eccentric shaft 220 is abutted to the inner wall of the limiting groove 7241, the transmission part 20 is in a locking state for limiting rotation, the limiting piece 70 rotates in the other time needle direction, the limiting groove 7241 is far away from the eccentric shaft 220, the transmission part 20 is in an unlocking state capable of rotating, and the transmission compressing mechanism can be switched between the initial compressing state and the pre-compressing state.

The top cover 410 of the base 40 is recessed toward the accommodating space to form a mounting groove, the mounting groove is provided with a mounting hole matched with the limiting member 70, and the base 40 further comprises a dust cover 941 which is matched with the mounting groove in a direction and is detachably connected in the mounting groove.

The limiting member 70 includes a fixed portion 710 fixedly connected to the base 40, a movable portion 720 rotatably connected to the fixed portion 710, and a key 730 engaged with the movable portion 720.

The fixing portion 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 is inserted into the mounting hole, and the fixing nut 712 is screwed around the cylinder wall of the first fixing cylinder 711 in the receiving space. The second fixing cylinder 713 is inserted into the first fixing cylinder 711, and a pin hole matching with the fixing pin 714 is formed at the position of the first fixing cylinder 711 corresponding to the second fixing cylinder 713, and the fixing pin 714 is inserted into the pin hole and detachably connected to the second fixing cylinder 713. The fixing portion 710 is fixedly coupled to the base 40 by the above arrangement.

The movable portion 720 includes a fixed cover, a fixed post 721, at least one positioning post 722, a connecting arm 723, and a stopper 724.

The fixing boss 721 includes a first fixing boss 7211, a second fixing boss 7212, and a third fixing boss 7213 connected in sequence from the top cover 410 to the second fixing boss 713.

The first fixing column 7211 is arranged in the mounting hole in a penetrating way, and a clamping groove matched with the lock key 730 is formed in the first fixing column 7211;

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 is penetrated in the positioning hole, and as an example, the second fixing post 7212 is provided with four positioning holes, and one positioning post 722 is correspondingly provided;

the third fixed column 7213 is arranged on the second fixed cylinder 713 in a penetrating way, one end of the connecting arm 723 is abutted against the end part of the first fixed cylinder 711, which is far away from the top cover 410, and is connected with the third fixed column 7213 by a screw, the other end of the connecting arm 723 is integrally connected with the limiting block 724, and the limiting block 724 is provided with a limiting groove 7241.

The fixed cover is disposed corresponding to the first fixed cylinder 711 and is clamped in the mounting groove, and the lock key 730 is used for penetrating into the fixed cover to abut against the positioning column 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, and the whole movable part 720 can rotate around the axis of the first fixed cylinder 711 by rotating the key 730, so that the limit groove 7241 of the movable part 720 is far away from the limit part 223 of the eccentric shaft 220 or is sleeved on the limit part 223 of the eccentric shaft 220.

The limiting part 223 and the corresponding limiting part 70 can lock the transmission compressing mechanism, the rotation of the transmission part 20 is limited when the transmission compressing mechanism does not move, and then the linear movement of the moving part 10 is limited, so that the locking function of the transmission compressing mechanism in the application of the electronic equipment is met through a simplified structure, the occupied space is small, the whole material of the transmission compressing mechanism is saved, the electronic equipment can be fixed in an explosion-proof charger during charging, and the charging process is more stable.

Working principle:

referring to fig. 1 to 22, first, when no external force is applied to the triggering member 30 to drive the transmission member 20 to rotate, the moving member 10 partially penetrates through the through hole 421, the transmission pressing mechanism is in an initial pressing state, the pressing member 530 of the charging switch 50 protrudes out of the accommodating space, and the pressing member 530 is spaced from the second circuit board 520, so that no electronic device is placed.

Next, an external force is applied to the triggering member 30 to drive the transmission member 20 to rotate, so that the transmission member 20 rotates 90 ° in a direction of a needle with the spindle 210 as an axial direction, the eccentric shaft 220 penetrates the transmission hole 111 of the moving member 10, the moving member 10 converts the rotational motion of the transmission member 20 into a linear motion, and the moving member 10 moves in a direction away from the through hole 421 until being completely accommodated in the accommodating space. Meanwhile, the second limiting structure 820 in the limiting rebound structure is fixedly connected to the transmission part 20, the second limiting structure 820 also rotates 90 ° in a time-needle direction by taking the main shaft 210 as an axial direction, the sliding block 821 on the second limiting structure 820 moves from the initial position of one limiting sliding groove 811 on the first limiting structure 810 to the maximum width of the next limiting sliding groove 811, the external force driving the transmission part 20 to rotate is stopped to be applied to the triggering part 30, the second elastic piece 830 can provide the second limiting structure 820 with the force rotating in the other time-needle direction relative to the first limiting structure 810 by taking the main shaft 210 as an axial direction, the sliding block 821 of the second limiting structure 820 can abut against the maximum width of the next limiting sliding groove 811, the transmission part 20 also stops moving along with the second limiting structure 820, the moving part 10 keeps a state of being completely accommodated in the accommodating space, the housing 510 of the charging switch 50 moves linearly along with the moving part 10, the whole charging switch 50 is completely accommodated in the accommodating space, and the pressing piece 530 and the second circuit board 520 are arranged at intervals. At this time, the transmission pressing mechanism is in a pre-pressed state, so that a user can put the electronic device into the charger, and the charging port of the electronic device is connected with the charging interface 90 of the explosion-proof charger, but is not electrified.

Finally, an instantaneous external force is applied to the triggering member 30 again to rotate the transmission member 20, the sliding block 821 on the second limiting structure 820 is elastically deformed, the sliding block 821 returns to the previous limiting sliding groove 811 from the maximum width of the one limiting sliding groove 811, and the second limiting structure 820 is subjected to the force provided by the second elastic member 830 to rotate in the other clockwise direction relative to the first limiting structure 810 by taking the spindle 210 as the axial direction, and the sliding block 821 returns to the initial position of the previous limiting sliding groove 811. At this time, the transmission member 20 rotates 90 ° with the spindle 210 as the axial direction and the other clockwise direction, the moving member 10 partially passes through the through hole 421, the first elastic element 60 can provide an elastic force for preventing the moving member 10 from moving away from the through hole 421, the moving member 10 moves toward the through hole 421 under the elastic force provided by the first elastic element 60, the transmission pressing mechanism returns to the initial pressing state, the pressing protrusion 112 passes through a groove on the electronic device matching with the pressing protrusion 112, the electronic device is fixed in the charger, the housing 510 of the charging switch 50 moves linearly with the moving member 10, the pressing element 530 protrudes out of the accommodating space, one end of the pressing element 530 abuts against the electronic device and moves toward the direction of the second circuit board 520 to abut against a contact point of 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, and the explosion-proof charger can charge the electronic device.

In addition, when the transmission compressing mechanism is in an initial compressing state, the limiting piece 70 rotates in a time needle direction, the limiting groove 7241 is close to the eccentric shaft 220, the eccentric shaft 220 is abutted to the inner wall of the limiting groove 7241, the transmission part 20 is in a locking state for limiting rotation, the limiting piece 70 rotates in the other time needle direction, the limiting groove 7241 is far away from the eccentric shaft 220, the transmission part 20 is in an unlocking state capable of rotating, and the transmission compressing mechanism can be switched between the initial compressing state and the pre-compressing state.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. An explosion-proof charger for charging electronic equipment, comprising: a base;

the charging interface is fixed on the base body and comprises a base body, a first fixing piece, a plurality of spring pins and a first circuit board;

2. The explosion-proof charger of claim 1, wherein the base body is provided with a mounting hole matched with the base body, a mounting ring groove is formed in the inner wall of the mounting hole, and a third convex ring matched with the mounting ring groove is protruded around the whole body of the base body by the silica gel sleeve.

3. The explosion-proof charger of claim 1, wherein the charging interface further comprises a dust-proof assembly rotatably connected to the base body, the dust-proof assembly comprises a dust-proof cover closely attached to the outside of the silicone sleeve, and the dust-proof cover is provided with a sealing groove matched with the first convex ring.

4. An explosion-proof charger according to claim 3, wherein said base body and said dust-proof assembly are provided with a dust-proof cover slot spaced therefrom for mating with said dust-proof cover;

5. An explosion-proof charger according to claim 1, further comprising a drive compression mechanism, the drive compression mechanism comprising:

6. An explosion-proof charger according to claim 5, wherein the side wall of the transmission hole is protruded with a step part matched with the eccentric shaft, the step part comprises a plane and a transition surface connected to the adjacent inner wall of the transmission hole from the plane, the plane extends towards the direction away from the first elastic piece and is perpendicular to the inner wall of the transmission hole, and a cross section of the transition surface perpendicular to the rotation axis direction of the transmission part is arc-shaped.

7. An explosion-proof charger according to claim 5, wherein the outer profile of the cross section of the eccentric shaft perpendicular to the axial direction thereof is a closed ring shape with smooth edges, and the widest width direction of the cross section is perpendicular to the radial direction of the main shaft.

8. The explosion-proof charger of claim 5, wherein the transmission compressing mechanism further comprises a limiting rebound member, the limiting rebound member further comprises a first limiting structure fixed on the base body, a second limiting structure fixed on the transmission member, and a second elastic member with two ends respectively connected with the first limiting structure and the second limiting structure;

9. An explosion-proof charger according to claim 8, wherein a plurality of limit sliding grooves are connected end to form a closed loop, a limit wall is formed at the joint of two adjacent limit sliding grooves, and an included angle a between the limit wall and the side wall of the limit sliding groove is larger than 90 ° and smaller than 150 °.

10. The explosion-proof charger of claim 5, wherein the transmission compressing mechanism further comprises a limiting piece rotatably connected to the base body, a limiting groove matched with the eccentric shaft is formed in the limiting piece, one end of the eccentric shaft penetrates through the limiting groove, and the whole body of the eccentric shaft abuts against the inner wall of the limiting groove.