WO2023160244A1 - Durable vehicle-mounted charger - Google Patents

Abstract

The present application relates to a durable vehicle-mounted charger, comprising a housing, a fuse, and a spring. The housing is separately provided with a connecting end electrically connected to a vehicle power supply system and an interface output end electrically connected to a mobile device data line; the fuse and the spring are mounted in the housing close to the connecting end; one end of the fuse is abutted against one end of the spring; the spring drives the fuse to move towards the connecting end; a metal spacer is further comprised; a limiting member used for limiting the fuse and the spring to be located at the central axis position of the housing is provided in the housing; a limiting groove for accommodating the fuse and the spring is formed in the limiting member; the end of the spring farthest from the fuse is abutted against the limiting member; the width of the metal spacer is the same as the width of the limiting groove; and the metal spacer is slidably connected in the limiting member and is located between the spring and the fuse.

Description

Rugged Car Charger

related application

This application claims priority to a Chinese patent application with application number 202210182451.6 filed on February 25, 2022, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of auto parts, in particular to a durable car charger.

Background technique

With the popularization of automobiles, automobiles are equipped with car chargers for the power supply of electronic products such as car refrigerators and driving recorders.

At present, the existing car charger mainly includes a housing, a safety tube and a spring, wherein the two ends of the housing are respectively provided with a connection terminal for electrical connection with the vehicle power supply system and an interface for electrical connection with the data line of the mobile device. The output end, the safety tube and the spring are arranged in the housing close to the connection end. The safety tube is in contact with the connection end, and one end of the spring is in contact with the end of the safety tube away from the connection end. The tube fits tightly against the connection end. Then, because the contact area between the end of the spring and the safety tube is small, the force on the end of the safety tube is not uniform, and the stability of the collision between the safety tube and the connecting end is not high, and the safety tube is easily scrapped during use.

With regard to the related technologies mentioned above, the inventor believes that the defect is that the insurance tube directly conflicts with the spring, resulting in a low service life, which needs to be further improved.

technical solution

In order to increase the service life of the fuse and the spring, the present application provides a durable vehicle charger.

A durable on-board charger provided by this application adopts the following technical solution:

A durable car charger, including a housing, a safety tube and a spring, the two ends of the housing are respectively provided with connection terminals for electrical connection with the vehicle power supply system and interface outputs for electrical connection with the data line of the mobile device end, the safety tube and the spring are installed inside the housing close to the connection end, one end of the safety tube abuts against the end of the spring, and the spring drives the safety tube to move toward the connection end, and also includes a metal spacer, inside the housing There is a limit piece for limiting the location of the safety tube and the spring on the central axis of the housing. A limit groove for accommodating the safety tube and the spring is formed in the limit piece. The spring is far away from the end of the safety tube and the limit piece. In contact with each other, the width of the metal spacer is consistent with the width of the limit groove, and the metal spacer is slidably connected in the limit piece and located between the spring and the safety tube.

By adopting the above-mentioned technical scheme, the width of the metal spacer is consistent with the width of the limit groove, which ensures that when the metal spacer is abutted and slid by the spring along the inner wall of the limiter, the metal spacer remains in a horizontal state and is not affected by the elastic force of the spring. Uniform and inclined, and then the metal spacer evens the elastic force of the spring, so that the insurance tube is evenly stressed, and it is not easy to tilt and cause friction with the shell, effectively improving the service life of the insurance tube and the spring.

In one embodiment, the housing includes a handle, a first housing and a second housing, the handle is integrally formed with the first housing, and the first housing and the second housing can be Detachable connection, the limiting member includes a first limiting frame and a second limiting frame, the first limiting frame is arranged at the inner wall of the first casing, and the second limiting frame is arranged at the second casing On the inner wall, both the inner walls of the first limiting frame and the second limiting frame are provided with limiting strips for abutting against the side walls of the safety tube and the side walls of the metal spacer.

By adopting the above-mentioned technical scheme, the production process of the shell is simpler and more convenient than the traditional one-piece shell, and the cost is low. The service life of the shell is improved through the detachable connection, and the damage caused by the broken fuse is effectively avoided. The dilemma that the entire car charger cannot be used occurs, thereby improving the applicability of the car charger. The limit groove formed by the set first limit frame and the second limit frame can support and protect the safety tube and the spring. on the central axis.

In one embodiment, the connection end includes a positive pole column and a fastening cover, the lower ends of the outer walls of the first casing and the second casing are provided with external threads, and the fastening cover has a hole for the positive pole column to pass through. The inner wall of the input port is provided with an internal thread for mating connection with the external threads of the first shell and the second shell, the internal thread of the fastening cover is provided with a first positioning block, and the first positioning block is provided on the internal thread of the fastening cover. A second positioning block is provided at the external thread of the first housing or the second housing.

By adopting the above-mentioned technical solution, the housing and the fastening cover can be detachably connected through threaded connection, and the threaded connection method can be more stable, and it is also convenient to replace the safety tube in the installation cavity, and the fastening cover is screwed into the housing to connect the positive electrode The column is against the safety tube, and when the fastening cover is unscrewed, the safety tube can pop out under the action of the spring, which facilitates the replacement of the safety tube. When the set first positioning block is in contact with the second positioning block, the user can feel that the connection is in place. At the same time, the first positioning block and the second positioning block block each other and will not loosen without external force, which improves the fastening cover The tightness of the connection with the shell improves the safety of the car charger.

In one embodiment, one side of the metal spacer is integrally formed with a sliding rod, and the top side of the first limiting frame and the second limiting frame are both provided with sliding openings for the sliding rod to pass through. A clamping block is provided at the side of the top end of the sliding insertion rod, and an anti-slip block is provided on the inner wall of the first housing above the first limiting frame, and the anti-slipping block is provided with a slide for sliding insertion of the sliding insertion rod. Socket, the top side of the clamping block is integrally formed with a clamping part abutting against the top of the clamping block; metal clamping shrapnels are arranged on both sides of the bottom surface of the metal spacer, and a The embedding groove for the fuse to be embedded.

By adopting the above technical solution, the sliding insertion rod provided improves the sliding stability of the metal spacer under the limitation of the sliding opening. The clamping part and the anti-slip block set can limit the position range of the metal spacer in the limiting groove, reducing the spring ejection of the safety tube when the safety tube is replaced. Due to the large elastic force, the position of the safety tube is ejected too much, causing the safety tube to be damaged. Due to inertia, it rushes out of the hole and falls to the ground to cause damage. The set metal clamping shrapnel firmly clamps one end of the insurance tube, and the set embedding groove can firmly clamp the other end of the insurance tube, making the insurance tube more stable and not loose when in contact, and can better protect the life and elasticity of the spring. At the same time, the contact surface with the positive pole and the contact surface of the metal spacer are increased, so that a large current can be exceeded, the heat dissipation effect is improved, and the safety is higher.

In one embodiment, the first housing and the second housing are provided with a limiting block that is consistent with the width of the limiting bar near the inner side wall of the sliding rod.

By adopting the above technical solution, the provided limiting block effectively restricts the sliding insertion of the sliding insertion rod along the axial direction of the housing, further increasing the sliding stability of the metal spacer.

In one embodiment, the interface output end includes a top cover, a clamping plate and interface components, the top cover is detachably installed on the top of the housing, and the interface components include wired output components and wiring interface components device, the top cover is provided with a data line hole for clamping and fitting of wired output components and a wiring interface for clamping and fitting of wiring interface components, and the clamping plate is arranged at the bottom of the top cover. The side of the wiring interface component is provided with a clamping protrusion, and the clamping plate is provided with an insertion plate close to the wiring interface component, and the insertion plate is provided with a card interface for the clamping protrusion to engage with.

By adopting the above technical solution, the provided wiring interface components and wired output components effectively increase the scope of applicable products of the present application, and the provided snap-in protrusions and card interface snap-fit can realize the fixing of the wiring interface components.

In one embodiment, the housing is provided with a negative elastic sheet, the first housing is symmetrically provided with two first connection end surfaces, the second housing is provided with two second connection end surfaces, and the first A connection end surface is provided with a first groove, and the second connection end surface is provided with a second groove at a position corresponding to the first groove, and the first groove and the second groove can communicate to form a negative elastic sheet The mounting hole pierced by the protruding part, the middle part of the negative electrode elastic sheet is provided with a clamping block, and the clamping plate is provided with a bayonet for clamping the clamping block.

By adopting the above technical solution, the formation of the installation hole increases the installation space for the negative electrode elastic sheet. At the same time, the negative electrode elastic sheet is further fixedly installed on the clamping plate through the clamping block and the clamping block, which effectively enhances the stability of the installation of the negative electrode elastic sheet, and the clamping method is also convenient for installation and disassembly.

In one embodiment, the inner wall of the first housing is symmetrically provided with plug-in blocks, the inner wall of the second housing is provided with a plug-in part, and the plug-in part is provided with a hole for snap-fitting with the plug-in block. The insertion groove, the bottom of the first connection end surface is provided with a boss, and the position of the second connection end surface is provided with a slot for inserting and mating with the boss.

By adopting the above-mentioned technical solution, the plug-in block and the plug-in groove are clamped and matched to realize the connection between the first shell and the second shell. The cooperation between the slot and the plug-in block is not enough to ensure the stability of the connection, that is, the connection between the lower end of the first housing and the second housing is not stable enough. Therefore, the protrusion is further matched with the slot to further increase the connection between the first housing and the second housing. The stability of the connection between the two shells is also very convenient for disassembly and installation.

In one embodiment, the bottom surface of the top cover is integrally formed with a mounting part, and the mounting part is provided with a fitting ring groove, and a plurality of protrusions are arranged in the fitting ring groove, and the handle part is far away from the first housing One end is provided with a notch for snap-fitting with the bump.

By adopting the above technical solution, the interlocking ring groove provides space for the connection between the handle and the top cover, and also improves the connection tightness between the handle and the top cover. Detachable connection, easy to install and disassemble.

In one embodiment, the bottom of the fastening cover is provided with several elliptical cooling holes around the periphery of the input port.

By adopting the above technical solution, the provided cooling holes effectively and quickly dissipate the heat of the positive electrode, which is beneficial to the good operation of the on-board charger.

In summary, the beneficial technical effects included in this application are as follows:

The width of the set metal spacer is consistent with the width of the limit groove, which ensures that when the metal spacer is abutted and slid by the spring along the inner wall of the limiter, the metal spacer remains horizontal and does not tilt due to uneven spring force , and then make the metal spacer even the elastic force of the spring, so that the insurance tube is evenly stressed, and it is not easy to tilt to cause friction with the shell, effectively improving the service life of the insurance tube and the spring.

Description of drawings

FIG. 1 is a schematic diagram of the overall front view structure of Embodiment 1 of the present application.

Fig. 2 is a schematic diagram of the exploded structure of other parts except the first casing in Embodiment 1 of the present application.

FIG. 3 is a schematic diagram of the exploded structure of other components in Example 1 of the present application except the second casing and the negative elastic sheet.

Fig. 4 is a schematic diagram of the structure of the fastening cover in Embodiment 1 of the present application.

Fig. 5 is a schematic diagram of the structure of the second casing part in Embodiment 1 of the present application.

Fig. 6 is a schematic structural diagram of the first casing part in Embodiment 1 of the present application.

Fig. 7 is a schematic diagram of the structure of the top cover in Embodiment 1 of the present application.

Fig. 8 is a schematic side view of the overall structure of Embodiment 2 of the present application.

FIG. 9 is a schematic diagram of the exploded structure of Embodiment 2 and Embodiment 3 of the present application.

Explanation of reference numerals: 1. Housing; 10. Handheld part; 11. First housing; 12. Second housing; 13. Fastener; 14. Rhombus-shaped protrusion; 2. Insurance tube; 20. Spring; 3. Connecting end; 30. Positive pole; 300. Clamping groove; 31. Fastening cover; 32. Input port; 33. First positioning block; 34. Second positioning block; 35. Cooling hole; 4. Interface output 40, top cover; 41, snap-in board; 42, wiring interface components; 43, wired output components; 44, wiring interface; 45, data line hole; 46, installation board; 47, snap-in protrusion; 48. Card interface; 49. Relief groove; 5. Metal spacer; 50. Sliding rod; 51. Sliding opening; 52. Clamping block; 53. Clamping part; 54. Limiting block; 55. Anti-slipping block ; ; 63, limit bar; 64, through the mouth; 7, the negative elastic sheet; 70, the first connection end face; 71, the second connection end face; 72, the installation hole; 720, the first groove; 721, the second groove ;73, card block; 74, bayonet socket; 8, socket block; 80, socket part; 81, socket slot; 82, boss; 83, slot; 84, limit part; 9, installation part; 90, embedding ring groove; 91, bump; 92, notch; 93, card notch; 100, left shell; 101, right shell; 102, threaded cover; 103, encircling metal clamp tube; mouth.

Embodiments of the present invention

The present application will be described in further detail below in conjunction with accompanying drawings 1-9.

The embodiment of the present application discloses a durable on-board charger.

Example 1:

Referring to Fig. 1 and Fig. 2, the durable car charger includes a housing 1, a safety tube 2 and a spring 20, wherein the two ends of the housing 1 are respectively provided with a connection end 3 and an interface output end 4, in this embodiment, the The connection end 3 is the bottom end of the housing 1, and the interface output end 4 is the top end of the housing 1, which will not be described in detail below. The connection end 3 is used for electrical connection with the automobile power supply system, and the interface output end 4 is used for electrical connection with the data line of the mobile device. The inside of the housing 1 is in a hollow state, and the safety tube 2 and the spring 20 are installed inside the housing 1 close to the connection end 3 Specifically, the spring 20 and the safety tube 2 are set along the axial direction of the housing 1 from the output end 4 of the interface to the connection end 3. One end of the safety tube 2 is in contact with the end of the spring 20, and the spring 20 is always driven by a The force of the movement of the fuse 2 towards the connection end 3. The application also includes a metal spacer 5. At the same time, a limiting member 6 is provided in the housing 1. The limiting member 6 can limit the position of the safety tube 2 and the spring 20 on the central axis of the housing 1. A limiting member 6 is formed in the limiting member 6. Groove 62, the limit groove 62 accommodates the safety tube 2 and the spring 20, and the end of the spring 20 away from the safety tube 2 abuts against the inner wall of the limiter 6, and the set metal spacer 5 is horizontally slidably connected in the limiter 6, and the metal spacer The sheet 5 is located between the spring 20 and the safety tube 2, and the width of the metal spacer 5 is consistent with the width of the limiting groove 62, which ensures that the metal spacer 5 remains in place when the spring 20 abuts and slides along the inner wall of the limiting member 6. In a horizontal state, there is no inclination due to uneven elastic force of the spring 20 . For the insurance tube 2, the metal spacer 5 evens the elastic force of the spring 20, so that the insurance tube 2 is evenly stressed, and it is not easy to tilt and cause friction with the housing 1, effectively improving the service life of the insurance tube 2 and the spring 20 .

Specifically, referring to FIG. 2 and FIG. 3, in this embodiment, the housing 1 includes a handle 10, a first housing 11, and a second housing 12, the handle 10 is integrally formed with the first housing 11, and the first The housing 11 is detachably connected to the second housing 12, and the first housing 11 and the second housing 12 are enclosed to form a hollow cylinder. The limiting member 6 includes a first limiting frame 60 and a second limiting frame 61, the first limiting frame 60 is integrally formed on the inner wall of the first housing 11, and the second limiting frame 61 is integrally formed on the second housing. At the inner wall of the body 12, the first limiting frame 60 and the inner wall of the second limiting frame 61 are provided with a limiting bar 63, the extending direction of the limiting bar 63 is consistent with the axial direction of the housing 1, and the limiting bar 63 is aligned with the side wall of the safety tube 2. Abutting against the side wall of the metal spacer 5, the limiting strip 63 can limit the safety tube 2, the metal spacer 5 and the spring 20 on the central axis of the housing 1, and the space formed between the two limiting strips 63 is The limiting groove 62 , the formed limiting groove 62 can support and protect the insurance tube 2 and the spring 20 .

Referring to Fig. 2 and Fig. 3, in this embodiment, the first limiting frame 60 and the second limiting frame 61 are formed with a through opening 64 towards the connecting end 3, and the through opening 64 can be used for the safety tube 2 to pass through. In order to facilitate the replacement of the insurance tube 2, specifically, in this embodiment, the connecting end 3 includes a positive pole 30 and a fastening cover 31, wherein, referring to FIG. 4, the fastening cover 31 is provided with an input port 32, and the positive pole 30 passes The input port 32 is in contact with the safety tube 2, and the lower ends of the outer walls of the first housing 11 and the second housing 12 are provided with external threads, and the inner wall of the fastening cover 31 is provided with internal threads, and the internal threads are connected with the first housing 11. It is threadedly connected with the external thread of the second housing 12, and the replacement of the safety tube 2 can be realized by turning the fastening cover 31 to open the fastening cover 31, and the spring 20 provided can automatically eject the safety tube 2, which improves the convenience of replacement sex.

It is worth noting that, in order to simplify the production process of the fastening cover 31, the inner thread of the inner wall of the fastening cover 31 is intermittent, which is for easy demoulding and easy production.

Further, referring to FIG. 2 and FIG. 5 , in order to strengthen the connection tightness between the fastening cover 31 and the housing 1 , an internal thread position is provided on the inner wall of the fastening cover 31 and a first positioning block is provided near one end of the fastening cover 31 33. A second positioning block 34 is provided at the position where the second casing 12 is provided with external threads. When the first positioning block 33 is screwed to contact with the second positioning block 34, the operator can feel and know that the Rotate in place, this setting can effectively prevent the thread from loosening. In this embodiment, the second positioning block 34 is disposed on the second housing 12 , and in other embodiments, the second positioning block 34 may also be disposed on the first housing 11 , which is not limited here.

In addition, referring to Fig. 2 and Fig. 3, in this embodiment, a sliding insertion rod 50 is integrally formed on one side of the set metal spacer 5, the extending direction of the sliding insertion rod 50 is consistent with the axial direction of the housing 1, and the first limiting frame 60 and the top side of the second limiting frame 61 are provided with a sliding opening 51, the sliding opening 51 is provided for the sliding insertion rod 50 to be inserted, and the top side of the sliding insertion rod 50 is integrally formed with a clamping block 52, specifically, the clamping The top side of the connection block 52 is also integrally formed with a clamping portion 53, and an anti-slip block 55 is integrally formed on the inner wall of the first housing 11 above the first limit frame 60, and a slip socket 56 is provided on the anti-slip block 55. The sliding socket 56 is used for sliding insertion of the sliding rod 50 , and the bottom of the clamping part 53 abuts against the top of the anti-slip block 55 . Under the limitation of the sliding insertion rod 50 and the sliding opening 51, the sliding of the metal spacer 5 is more stable. The clamping portion 53 and the anti-slip block 55 provided can limit the position range of the metal spacer 5 in the limiting groove, and also effectively block the excessive elastic force of the spring 20 on the safety tube 2, so as to reduce the damage of the spring when replacing the safety tube 2. 20 ejects safety tube 2, because the position that safety tube 2 is ejected too much due to elastic force, causes safety tube 2 to rush out of perforation 64 because of inertia and fall to the situation that damage occurs on the ground.

In addition, referring to FIG. 2 , in this embodiment, metal clamping elastic pieces 59 are integrally formed on both sides of the bottom surface of the metal spacer 5 , and the safety tube 2 is clamped in the metal clamping elastic pieces 59 , and the middle part of the metal clamping elastic pieces 59 faces the safety tube. Two depressions effectively enhance the clamping and stabilizing effect on the safety tube 2. At the same time, the positive pole 30 is provided with a fitting groove 300 near the end of the fastening cover 31, and the fitting groove 300 is used for inserting the insurance tube 2. In this embodiment, the fitting groove 300 is a cylindrical groove, and the radius of the fitting groove 300 is the same as The radius of the fuse tube 2 is consistent, which can effectively increase the contact area with the end of the fuse tube 2, thereby enabling excessive current, enhancing the heat dissipation effect, and improving safety. The set metal clamping shrapnel 59 and the embedding groove 300 can firmly clamp the two ends of the insurance tube 2 so that the insurance tube 2 is more stable when in contact, not easy to move, and can better protect the life and elasticity of the spring 20 .

Referring to Figure 3, in order to simplify the production process, the clamping block 52 is bent and formed at the bottom side of the clamping part 53 to form a reinforcing rib 57, and a threading groove 58 is formed between the reinforcing rib 57 and the sliding rod 50, which is conducive to fixing the shell The internal circuit of the body 1, the anti-slip block 55 provided can also provide stress points and fixed positions for other parts such as wires, so that the parts inside the case 1 do not interfere with each other and work normally. When shaking, the internal structure will not be sent, which improves the safety.

In addition, referring to FIG. 2 and FIG. 6 , a restricting block 54 is provided on the inner side wall of the side of the first housing 11 and the second housing 12 close to the sliding rod 50 , and the width of the provided restricting block 54 is consistent with the width of the limiting bar 63 . The limiting block 54 can effectively limit the sliding insertion of the sliding rod 50 along the axial direction of the housing 1, and further increase the stability of the sliding of the metal spacer 5 [0048] In this embodiment, referring to Figures 2 and 3, the interface provided The output terminal 4 includes a top cover 40, a clamping plate 41 and interface components, wherein the top cover 40 is detachably installed on the top of the housing 1, and the interface components provided include a wired output component 43 and a wiring interface component 42, The scope of application of the present application is effectively increased. The top cover 40 is provided with a data line hole 45 for snap-fitting of the wired output components 43. At the same time, the top cover is also provided with a wiring interface 44 for the snap-fitting of the wiring interface components 42, wherein the wiring interface 44 type Including TypeC interface, USB interface or integrated USB and TypeC interface, etc. The clamping plate 41 is clamped at the bottom of the top cover 40, and the clamping plate 41 is accommodated inside the housing 1. The clamping plate 41 is trapezoidal, and a clamping protrusion 47 is provided on the side of the wiring interface component 42. The connecting plate 41 is integrally formed with an inserting plate 46 near the wiring interface components 42. The inserting plate 46 is perpendicular to the clamping plate 41, and the inserting plate 46 is provided with a card interface 48. connection, so as to realize the fixing of the wiring interface components, the clamping plate 41 is provided with a relief groove 49, the relief groove 49 is used to give way to the wired output components 43, and the wired output components 43 are clamped on the top cover 40 at the bottom.

In this embodiment, referring to FIG. 2 and FIG. 3 , a negative electrode elastic piece 7 is installed in the housing 1 , specifically, a connection end 3 is formed at the connection between the first housing 11 and the second housing 12 , and the first housing 11 The body 11 is called the first connection end 3 surface, and the second housing 12 is called the second connection end 3 surface. A first groove 720 is opened at the first connection end 3 surface, and the second connection end 3 surface The position corresponding to the first groove 720 is provided with a second groove 721, the first groove 720 and the second groove 721 can communicate to form a mounting hole 72, and the mounting hole 72 is used for the protrusion of the negative elastic sheet 7 to pass through , the middle part of the negative elastic sheet 7 is integrally formed with a clamping block 73, and a bayonet 74 is provided on the clamping plate 41, and the provided bayonet 74 is used for clamping by the clamping block 73, thereby realizing the fixing of the negative elastic sheet 7.

In this embodiment, referring to FIG. 2 and FIG. 3 , with regard to the detachable installation between the first housing 11 and the second housing 12 , a plug-in connector is arranged symmetrically at one end of the first housing 11 close to the handle 10 . Correspondingly, the inner wall of the second housing 12 is symmetrically provided with an insertion portion 80, and an insertion slot 81 is opened on the insertion portion 80, and the insertion block 8 can cooperate with the insertion slot 81 to connect the first shell The upper end of the body 11 and the second housing 12 is fixedly connected.

Referring to FIG. 2 and FIG. 3 , in order to make the connection between the second housing 12 and the first housing 11 and the handle 10 more stable and tight. A limiting portion 84 is provided at an end of the second housing 12 close to the handle portion 10 . The limiting portion 84 is specifically an arc-shaped plate, and the limiting portion 84 is integrally formed with the second housing 12 . When the first housing 11 is connected to the second housing 12 , the limiting portion 84 is in contact with the inner wall of the handle 10 . This arrangement can not only effectively improve the connection stability between the first housing 11 and the second housing 12, but also reduce the gap between the second housing 12 and the handle 10, thereby improving the safety of the car charger.

Further, referring to FIG. 2 and FIG. 3 , since the first housing 11 and the second housing 12 have a certain length, the cooperation between the insertion groove 81 and the insertion block 8 is not enough to ensure the stability of the connection, that is, the first The connection of the lower end of the second housing 12 of the housing 11 is not stable enough. Therefore, a protruding column 82 is provided at the lower end of each first connecting end 3, and correspondingly, a slot 83 is provided on the second connecting end 3, and the protruding post 82 and the slot 83 are plugged and matched to realize the first housing. Body 11 and the fixing of the lower end of the second housing 12.

It is worth noting that, in this embodiment, the installation positions of the plug block 8, the plug slot 81, the boss 82, and the slot 83 are not limited. Specifically, the plug block 8 and the plug slot 81 can not only be set The first housing 11 can also be arranged on the second housing 12 , and the bosses 82 and slots 83 can be arranged not only on the surface of the first connecting end 3 but also on the surface of the second connecting end 3 .

In this embodiment, referring to FIG. 1 , the handle 10 is specifically a cylinder with a large upper end radius and a smaller lower end radius. The outline of the handle portion 10 is arc-shaped, which is designed to fit the shape of the hand and enhance the user experience. In addition, a number of diamond-shaped protrusions 14 are provided on the side of the handle 10 close to the first housing 11 and the second housing 12 to increase the friction with the hand and enhance the stability of the grip.

Regarding the detachable installation between the top cover 40 and the housing 1 in this application, referring to FIG. 2 and FIG. , the outer bottom wall of the installation part 9 is designed to be wavy, the inner bottom wall of the installation part 9 is designed to be circular, and a number of protrusions 91 are arranged at the bottom of the embedding ring groove 90. In this embodiment, the number of protrusions 91 provided can be Five pieces are selected, and two of the protrusions 91 are arranged close to each other. In addition, the inner bottom wall of the installation part 9 is provided with a slot 93 for the clamping plate 41 to be clamped. At the same time, the outer circumference of the upper end of the handle portion 10 corresponds to the shape of the outer bottom wall of the mounting portion 9 to be wave-shaped to increase the tight fit with the top cover 40 . In order to cooperate with the bump 91, five notches 92 are provided on the upper end of the inner wall of the handle 10 in the circumferential direction, and two of the notches 92 are arranged next to each other. connect. The advantage of this setting is that it is easy to install and disassemble, on the one hand, it can improve the connection tightness, on the other hand, it can improve the aesthetic feeling, which is beneficial to market promotion. The protrusion 91 and the notch 92 arranged next to each other can play a guiding role.

In addition, referring to FIG. 4 , a number of heat dissipation holes 35 are provided around the periphery of the input port 32 at the bottom of the fastening cover 31 to effectively dissipate heat near the positive pole 30 . The heat dissipation holes 35 are oval. In other embodiments, the shape of the cooling holes 35 can also be square, rhombus, circle and other shapes.

Further, referring to FIG. 1 , in order to reduce the gap between the fastening cover 31 and the connection between the first housing 11 and the second housing 12 , a fastener 13 is provided at the connection. In this embodiment, the fastener 13 is specifically a fixing ring. Such setting not only achieves the reduction of gaps, but also enhances the aesthetic feeling, which is beneficial to market promotion.

The implementation principle of Embodiment 1 is: the metal spacer 5 is arranged between the safety tube 2 and the spring 20, and is consistent with the width of the limiting groove 62, which can ensure that the metal spacer 5 is bounded by the spring 20 along the inner wall of the limiting member 6. When abutting and sliding, the horizontal state is still maintained, and no inclination occurs due to uneven elastic force of the spring 20 . At the same time, the metal spacer 5 evens the elastic force of the spring 20, so that the safety tube 2 is evenly stressed, and it is not easy to tilt to cause friction with the housing 1, effectively improving the service life of the safety tube 2 and the spring 20.

Example 2:

Referring to Figure 8 and Figure 9, the difference between this embodiment and Embodiment 1 lies in the housing 1 and the interface output end 4, wherein the housing 1 includes a left housing 100 and a right housing 101, the left housing 100 and the right housing 100 The housing 101 is fixed as a whole by screws, and the interface output end 4 includes a threaded cover 102, a clamping plate 41 and interface components, wherein the inner wall of the threaded cover 102 is provided with internal threads, and the tops of the left housing 100 and the right housing 101 are External threads are respectively provided, and the threaded cover 102 is screwed to the top of the housing 1 through the internal thread and the external thread, the clamping plate 41 is clamped at the bottom of the threaded cover 102, and the clamping plate 102 is accommodated inside the housing 1. In this embodiment, the interface component is preferably a wiring interface component 42, and the right housing 101 is provided with a wiring interface 44 for snap-fitting of the wiring interface component 42. In practical applications, the types of the wiring interface 44 mainly include With TypeC interface, USB interface

Or integrate USB and TypeC interfaces, etc.

Example 3:

Referring to Fig. 9, the difference between this embodiment and Embodiment 1 is that the bottom surface of the metal spacer 5 is integrally formed with an encircling metal clamp tube 103, and the insurance tube 2 is inserted in the encircling metal clamp tube 103, and the encircling metal clamp tube The middle part of 103 is sunken toward the safety tube 2, which effectively enhances the clamping and stabilizing effect on the safety tube 2. The end of the encircling metal clamp tube 103 away from the metal spacer 5 is uniformly provided with a deformation opening 104, which effectively accommodates the clamping of the safety tube 2. deformation. The encircling metal clamp 103 makes the contact area between the metal and the insurance tube 2 wider, thereby increasing the conductivity and reducing the impedance, thereby protecting the product when the current is too large, the temperature is effectively reduced, and the safety is further improved. In addition, during the use of the product, the temperature is stored in the encircling metal clamp 103, which has better stability and protects the shell 1 from damage.

All of the above are preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made according to the structure, shape, and principle of the application should be covered by the protection scope of the application. Inside.

Claims (10)

1. A durable on-board charger, comprising a housing (1), a safety tube (2) and a spring (20), the housing (1) is respectively provided with connecting ends (3) for electrical connection with an automobile power supply system And an interface output end (4) for electrical connection with the mobile device data line, the safety tube (2) and the spring (20) are installed inside the housing (1) close to the connection end (3), the safety tube ( 2) One end abuts against one end of the spring (20), and the spring (20) drives the safety tube (2) to move toward the connection end (3), wherein the durable car charger also includes a metal spacer (5) , the casing (1) is provided with a limit piece (6) for limiting the position of the insurance tube (2) and the spring (20) on the central axis of the casing (1), and the limit piece (6) is formed There is a limiting groove (62) for accommodating the safety tube (2) and the spring (20), the end of the spring (20) away from the safety tube (2) abuts against the limiting member (6), and the metal spacer (5) The width is consistent with the width of the limit groove (62), and the metal spacer (5) is slidably connected in the limit piece (6) and is located between the spring (20) and the safety tube (2) .
2. The durable on-board charger according to claim 1, wherein the housing (1) comprises a handle (10), a first housing (11) and a second housing (12), the handle ( 10) Formed integrally with the first housing (11), the first housing (11) is detachably connected to the second housing (12), and the limiting member (6) includes a first limiting frame (60) and a second limit frame (61), the first limit frame (60) is set at the inner wall of the first casing (11), and the second limit frame (61) is set at the second At the inner wall of the housing (12), the inner walls of the first limiting frame (60) and the second limiting frame (61) are both provided with a set for connecting with the side wall of the safety tube (2) and the side of the metal spacer (5). The limit strip (63) that the wall abuts against.
3. The durable on-board charger according to claim 2, wherein the connection end (3) includes a positive pole (30) and a fastening cover (31), the first housing (11) and the second The lower end of the outer wall of the casing (12) is provided with external threads, and the fastening cover (31) is provided with an input port (32) for the positive pole (30) to pass through, and its inner wall is provided with a connection with the first casing. (11) and the internal thread of the external thread of the second housing (12), the internal thread of the fastening cover (31) is provided with a first positioning block (33), and the first housing (11) ) or the external thread of the second housing (12) is provided with a second positioning block (34).
4. The durable vehicle-mounted charger according to claim 2, wherein a slide bar (50) is integrally formed on one side of the metal spacer (5), and the first limiting frame (60) and the second One side of the top of the limiting frame (61) is provided with a sliding opening (51) for the sliding rod (50) to pass through, and the top side of the sliding rod (50) is provided with a locking block (52). An anti-slip block (55) is provided on the inner wall of the housing (11) above the first limiting frame (60), and the anti-slip block (55) is provided with a sliding socket for sliding insertion of the sliding rod (50) ( 56), the top side of the clamping block (52) is integrally formed with a clamping part (53) that abuts against the top of the clamping block (52); the metal spacer (5) is provided with metal clips on both sides of the bottom surface The shrapnel (59), the end of the positive pole (30) close to the fastening cover (31) is provided with an embedding groove (300) for inserting the safety tube (2).
5. The durable on-board charger according to claim 4, wherein, the first casing (11) and the second casing (12) are provided with a limit strip ( 63) Limiting blocks (54) of uniform width.
6. The durable on-board charger according to claim 2, wherein the interface output end comprises a top cover (40), a clamping plate (41) and interface components, and the top cover (40) is detachably mounted on At the top of the housing (1), the interface components include a wired output component (43) and a wiring interface component (42), and the top cover (40) is provided with a socket for the wired output component (43) to be snapped into place. The combined data line hole (45) and the wiring interface (44) for the clamping and fitting of the wiring interface components (42), the clamping plate (41) is arranged at the bottom of the top cover (40), and the wiring The side of the interface component (42) is provided with a clamping protrusion (47), and the clamping plate (41) is provided with an insertion plate (46) close to the wiring interface component (42), and the insertion plate (46) is A card interface (48) for the card connection of the card connection protrusion (47) is provided.
7. The durable on-board charger according to claim 6, wherein, the housing (1) is provided with a negative elastic sheet (7), and the first housing (11) is symmetrically provided with two first connection ends ( 3) surface, the second housing (12) is provided with two second connection ends (3) surfaces, the first connection end (3) surface is provided with a first groove (720), the second A second groove (721) is provided on the surface of the connecting end (3) corresponding to the first groove (720), and the first groove (720) can communicate with the second groove (721) to form a The mounting hole (72) through which the protrusion of the negative elastic sheet (7) passes, the middle part of the negative elastic sheet (7) is provided with a clamping block (73), and the clamping plate (41) is provided with a clamping block ( 73) bayonet socket (74) that snaps on.
8. The durable on-board charger according to claim 7, wherein, the inner wall of the first housing (11) is symmetrically provided with plug blocks (8), and the inner wall of the second housing (12) is provided with a plug-in part (80), the insertion part (80) is provided with an insertion groove (81) for snap-fitting with the insertion block (8), and the bottom of the surface of the first connection end (3) is provided with a boss ( 82), the position where the second connection end (3) faces the boss (82) is provided with a slot (83) for plugging and fitting with the boss (82).
9. The durable on-board charger according to claim 6, wherein, the bottom surface of the top cover (40) is integrally formed with a mounting portion (9), and the mounting portion (9) is provided with an embedding ring groove (90), so that A plurality of protrusions (91) are arranged in the clamping ring groove (90), and a notch ( 92).
10. The durable vehicle charger according to claim 3, wherein a plurality of elliptical cooling holes (35) are opened around the periphery of the input port (32) at the bottom of the fastening cover (31).