Direct current charging gun

Abstract

The utility model relates to the field of charging devices, and discloses a direct current charging gun. The device comprises a shell, a lock catch plate and an unlocking assembly, a first mounting cavity for mounting electronic components is formed in the shell, the lock catch plate is rotationally mounted in the first mounting cavity, and the front end of the lock catch plate is exposed in air to be suitable for being matched with a vehicle to achieve locking; a grip is arranged on the rear side of the shell and extends downwards in an inclined mode, and a holding groove for fingers to penetrate through is formed between the grip and the shell in a spaced mode. A second mounting cavity is formed in the grip, and the second mounting cavity is an inclined downward cavity and communicates with the first mounting cavity; the unlocking assembly comprises an unlocking button movably connected with the lock catch plate, the unlocking button is arranged in the second installation cavity in a sliding mode, and the side, close to the handheld groove, of the unlocking button penetrates out of the second installation cavity and is exposed in the handheld groove. The waterproof performance of the charging gun is improved, and the service life of the charging gun is prolonged. A palm can better hold the grip and is more attached to the grip, and the unlocking button does not need to be additionally pressed by fingers.

Description

TECHNICAL FIELD

[0001] The utility model relates to charging device technical field, specifically, relate to a direct current charging gun. BACKGROUND

[0002] The charging gun is the core bridge and safety hub connecting the charging facility and the electric vehicle. It is mainly used for charging the electric vehicle. The charging gun is divided into the alternating current charging gun (slow charging) and the direct current charging gun (fast charging), and the alternating current charging gun is mostly used for the family or the community, and the direct current charging gun is mostly used for the highway service area or the public charging station outdoors / indoors. Whether the alternating current charging gun or the direct current charging gun is provided with a lock catch and an unlocking button, after the charging gun is inserted into the charging port of the electric vehicle, the lock catch is connected with the matched part on the electric vehicle to realize locking, so that the charging gun is not easy to fall in the charging process, and after the charging is finished, the user can press the unlocking button to drive the lock catch to cancel the locking relationship, and then pulls down the charging gun.

[0003] However, the existing unlocking button is arranged at the top of the charging gun and exposed to the air, and since the unlocking button needs to be connected with the charging gun in sliding mode, therefore, a gap is generated at the matching part of the unlocking button and the charging gun. If the electric vehicle is suddenly rained when charging at the outdoor public charging station, then a small amount of rainwater is easy to accumulate or remain at the top of the direct current charging gun and seep into the inside of the direct current charging gun through the unlocking button, and if the rainwater or water vapor seeping into the inside of the charging gun cannot be discharged in time, the inside of the direct current charging gun will be in a humid environment for a long time, thereby causing the electronic components in the direct current charging gun to be damaged. In addition, the charging gun is usually tightly inserted into the charging port of the electric vehicle, and when the charging gun is pulled down, the user needs to press the unlocking button with the thumb to unlock, so that the whole palm cannot completely hold the charging gun to exert force, thereby affecting the user experience. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a direct current charging gun, including casing, lock catch board and unlocking assembly, the inside of casing is equipped with first installation cavity, electronic components are suitable for installing in first installation cavity, lock catch board rotation is installed in first installation cavity, lock catch board front end exposes in air to be suitable for with vehicle cooperation realizes locking, the rear side of casing is equipped with handle, handle extends obliquely downward, handle is spaced with casing and has the hand holding groove that finger passes through, the inside of handle is equipped with second installation cavity, second installation cavity is obliquely downward chamber, and with first installation cavity is continuous, the cavity wall of second installation cavity is away from first installation cavity and is equipped with drain hole, drain hole is along the direction of setting and penetrates handle, the unlocking assembly includes the unlocking button of lock catch board swing joint, the unlocking button slip is equipped in second installation cavity, and the side of unlocking button is close to hand holding groove and exposes in hand holding groove and is taken out second installation cavity chamber, when the user holds handle, the inside of finger will press the unlocking button and drive the unlocking button to move to second installation cavity inside to make the unlocking button drive lock catch board rotation and realize unlocking.

[0005] Optionally, the inside of the casing is provided with a third installation cavity, the side close to the first installation cavity of the third installation cavity is provided with a partition plate, the partition plate is provided with a wire hole for connecting the first installation cavity and the third installation cavity, and the third installation cavity is provided with a charging plug and a cable.

[0006] Optionally, the top of the first installation cavity penetrates the casing, and a first cover plate is welded and fixed at the opening of the top of the first installation cavity.

[0007] Optionally, a rubber plug is tightly inserted into the drain hole, and one end of the rubber plug protrudes out of the drain hole and is exposed to the air.

[0008] Optionally, the unlocking assembly further comprises a driving rod, the driving rod is rotationally installed in the second installation cavity, one side of the driving rod is hingedly connected with the lock catch plate, and the other side of the driving rod is hingedly connected with the unlocking button.

[0009] Optionally, a matching shaft is fixedly arranged at the tail end of the lock catch plate, a matching hole is arranged on the driving rod for inserting the matching shaft, the matching hole is a waist-shaped hole, a clamping groove is arranged on one end of the driving rod close to the matching shaft, the clamping groove is in communication with the matching hole, and the width of the clamping groove is smaller than the diameter of the matching hole.

[0010] Optionally, a ring groove is arranged on the matching shaft, and the driving rod is hingedly connected in the ring groove, so that the driving rod is not easy to move along the axial direction of the matching shaft.

[0011] Optionally, the unlock button is located on one side of the second mounting cavity and has two protrusions spaced apart, and the drive rod is located between the two protrusions and is hinged to the two protrusions.

[0012] Optionally, a reset spring is provided in the second mounting cavity, the reset spring being adapted to drive the unlock button to reset after sliding; a drive spring is provided at the bottom of the tail end of the latch plate, the drive spring being adapted to drive the latch plate to reset after rotation to maintain the locked state.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] 1. The tilted grip is more ergonomic and helps improve user comfort when holding it. At the same time, the unlock button is located on the inside of the grip, so even if there is a gap between the unlock button and the grip, rainwater is not easy to seep in. The second mounting cavity where the unlock button is located does not contain electronic components. All electronic components are located in the first mounting cavity. Even if rainwater enters the second mounting cavity, it will not affect the electronic components. Furthermore, the tilted second mounting cavity is less likely to allow rainwater entering the second mounting cavity to enter the first mounting cavity and damage the electronic components, thus improving the waterproofness and service life of the charging gun.

[0015] 2. Since users must hold the handle when plugging and unplugging the charging gun, and the unlock button is located inside the handle, users can press the unlock button to unlock the charging gun while holding the handle. The palm can better grip the handle and fit the handle more closely, making it easier to apply force when pulling out the charging gun, thus improving the user experience.

[0016] 3. If rainwater enters the second chamber, it can be automatically drained through the drain hole. Under normal circumstances, the drain hole is blocked by a rubber plug to prevent dust from entering. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the DC charging gun in an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the housing, locking plate, unlocking assembly, and grip in an embodiment of the present utility model;

[0019] Figure 3 This is an exploded view of the shell and the latch plate in an embodiment of this utility model;

[0020] Figure 4 This is an enlarged view of the drain hole and rubber plug in an embodiment of this utility model;

[0021] Figure 5 This is an exploded view of the latch plate and unlocking assembly in an embodiment of this utility model;

[0022] Figure 6 The utility model discloses a structure diagram of the driving rod in the embodiment of the utility model.

[0023] Mark explanation: 1, the shell, 11, first installation cavity, 12, first cover plate, 13, third installation cavity, 14, threading hole, 15, key bolt, 2, lock catch plate, 21, drive spring, 22, fit axle, 3, unlocking assembly, 31, unlocking button, 32, driving rod, 33, protruding block, 34, fit hole, 35, clamping groove, 4, handle, 41, hand holding groove, 42, second installation cavity, 43, drain hole, 44, rubber plug, 45, second cover plate, 46, sliding hole, 47, reset spring. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following will be combined with the attached Figures 1-6 The application is further described in detail.

[0025] The utility model embodiment's attached graph is equipped with coordinate system XYZ, wherein the positive direction of X axle represents right direction, the reverse direction of X axle represents left direction, the positive direction of Y axle represents front direction, the reverse direction of Y axle represents back direction, the positive direction of Z axle represents upper direction, and the reverse direction of Z axle represents lower direction.

[0026] The utility model embodiment provides a kind of direct current charging gun, refer to Figure 1 With Figure 2 Direct current charging gun includes shell 1, lock catch plate 2 and unlocking assembly 3.The first installation cavity 11 is equipped in shell 1 interior, and electronic components are suitable for being installed in the first installation cavity 11, and lock catch plate 2 is rotatably installed in the first installation cavity 11, and the front end of lock catch plate 2 is exposed to air to be suitable for being locked with vehicle cooperation.The handle 4 is integrally formed on the rear side of shell 1, and the handle 4 extends obliquely downward, and the handle 4 is spaced from shell 1 with hand holding groove 41 for finger to pass through.The second installation cavity 42 is equipped in the handle 4 interior, and the second installation cavity 42 is inclined downward chamber, and is communicated with the first installation cavity 11.Unlocking assembly 3 is movably arranged in the second installation cavity 42 and is movably connected with lock catch plate 2, and one end of unlocking assembly 3 is exposed in hand holding groove 41 by passing out the second installation cavity 42 chamber.When user holds handle 4 and pulls out charging gun, the inside of finger will exert pressing force to drive unlocking assembly 3 to move to the inside of second installation cavity 42, to make unlocking assembly 3 drive lock catch plate 2 to rotate and realize unlocking.

[0027] Refer to Figures 1 to 3The electronic components installed in the first installation cavity 11 include but are not limited to micro switches, which cooperate with the lock plate 2 and further transmit the signal of whether the lock plate 2 is in a locked state or an unlocked state to the circuit board. The top of the first installation cavity 11 penetrates the shell 1, thereby facilitating the assembly of the electronic components. The first cover plate 12 is arranged at the opening of the top of the first installation cavity 11 to shield the opening. The first cover plate 12 and the shell 1 are both made of plastic, and the first cover plate 12 and the shell 1 are fixed by ultrasonic welding, thereby improving the sealing performance of the first installation cavity 11. The front end of the lock plate 2 is provided with a hook that cooperates with the electric vehicle, so that the lock plate 2 can be locked.

[0028] The shell 1 is internally provided with a third installation cavity 13 located below the first installation cavity 11. The third installation cavity is installed with a charging plug adapted to the charging port of the electric vehicle, an integrated circuit board, and a cable electrically connected to the charging station. The cable and the charging plug are both electrically connected to the integrated circuit board. The side of the third installation cavity 13 close to the first installation cavity 11 is provided with a partition plate, thereby separating the third installation cavity 13 and the first installation cavity 11 into two independent cavities. The partition plate is only provided with a wire hole 14 for the cable on the micro switch to pass through and be electrically connected to the integrated circuit board. Even if water seeps into the first installation cavity 11, it is difficult for the water to enter the third installation cavity 13, thereby improving the waterproof performance of the charging plug, the integrated circuit board, and the cable.

[0029] Referring to Figures 2 to 4 The cavity wall of the second installation cavity 42 away from the first installation cavity 11 is provided with a drainage hole 43 penetrating the handle 4 along the direction in which the drainage hole 43 is arranged. Even if rainwater seeps into the second installation cavity 42, it is difficult for the rainwater to enter the first installation cavity 11 and damage the electronic components in the first installation cavity 11 because the second installation cavity 42 is inclined and the height of the end of the second installation cavity 42 close to the first installation cavity 11 is higher than the other end. At the same time, the seeped rainwater can be discharged through the drainage hole 43. A rubber plug 44 is tightly inserted into the drainage hole 43, and one end of the rubber plug 44 protrudes out of the drainage hole 43 and is exposed to the air. Under normal circumstances, the drainage hole 43 is blocked by the rubber plug 44 to prevent dust from entering. When draining, the rubber plug 44 can be directly pulled out.

[0030] The side wall of the shell 1 is provided with a first bolt hole in communication with the first installation cavity 11 and penetrating the shell 1. A star-shaped bolt 15 is inserted into the first bolt hole, and the other end of the star-shaped bolt 15 is threadedly connected with a nut. The lock plate 2 is sleeved on the star-shaped bolt 15 and is rotatably connected with the star-shaped bolt 15, thereby realizing the rotatable connection with the shell 1. The cooperation part of the star-shaped bolt 15 and the shell 1 is provided with a sealing sleeve to prevent rainwater from seeping in.

[0031] Referring to Figure 2 and Figure 3The bottom of the tail end of the locking plate 2 is provided with a driving spring 21, which is suitable for driving the rotated locking plate 2 to reset to maintain the locked state. The bottom of the tail end of the locking plate 2 and the cavity wall of the first mounting cavity 11 away from the opening are both fixedly provided with spring columns, the two ends of the driving spring 21 are respectively sleeved on the two spring columns, and the driving spring 21 abuts against the locking plate 2, so that the locking plate 2 can automatically rotate and reset when it is not forced after being unlocked.

[0032] Referring to Figure 2 With Figure 5 , the unlocking assembly 3 includes an unlocking button 31 and a driving rod 32. The unlocking button 31 is slidingly arranged in the second mounting cavity 42, and one end of the unlocking button 31 protrudes into the handle slot 41 through the handle 4. The driving rod 32 is rotatably arranged in the second mounting cavity 42, one side of the driving rod 32 is hingedly connected with the locking plate 2, and the other side is hingedly connected with the unlocking button 31. When the unlocking button 31 is pressed inward into the second mounting cavity 42, the driving rod 32 is driven to rotate, and the driving rod 32 drives the tail end of the locking plate 2 to rotate and press downward, so that the front end of the locking plate 2 is lifted up to be unlocked.

[0033] Referring to Figures 3 to 5 In detail, the side of the second mounting cavity 42 away from the handle slot 41 penetrates the handle 4, so as to facilitate the installation of the unlocking button 31 and the driving rod 32. The opening of the second mounting cavity 42 is covered with a second cover plate 45, which is made of plastic material, and the second cover plate 45 is also welded and connected with the handle 4 by ultrasonic welding technology, thereby ensuring the sealing of the opening of the second mounting cavity 42.

[0034] Referring to Figures 2 to 5 The cavity wall of the second mounting cavity 42 near the handle slot 41 is provided with a sliding hole 46, and the sliding hole 46 is in communication with the handle slot 41. The unlocking button 31 is slidingly inserted into the sliding hole 46, and the unlocking button 31 is integrally formed with an annular flange on the side of the second mounting cavity 42. The outer diameter of the annular flange is greater than the hole diameter of the sliding hole 46, so that the unlocking button 31 is not easy to separate from the second mounting cavity 42 through the sliding hole 46. The second mounting cavity 42 is provided with a reset spring 47, which drives the unlocking button 31 to automatically reset when the pressing force applied to the unlocking button 31 is removed. The side of the second mounting cavity 42 and the side of the unlocking button 31 where the flange is arranged are both fixedly provided with plug columns, and the two ends of the reset spring 47 are respectively inserted into the plug columns, and the two ends of the reset spring 47 abut against the second cover plate 45 and the unlocking button 31 respectively. The reset spring 47 and the driving spring 21 form a double reset structure, which ensures the stability of the locking plate 2 and the unlocking button 31 when they are reset.

[0035] The side wall of the handle 4 is provided with a second bolt hole, which is in communication with the second mounting cavity 42 and penetrates the handle 4, and a pin bolt is inserted in the second bolt hole, and a nut is threadedly mounted on the other end of the pin bolt, thereby being fixedly connected with the handle 4. The driving rod 32 is sleeved on the pin bolt and is rotationally connected with the pin bolt, thereby realizing the rotational connection with the handle 4. The sealing sleeves are sleeved on the cooperation positions of the pin bolt and the handle 4 to prevent rainwater from entering the second mounting cavity 42.

[0036] In combination Figure 2 With reference to Figure 5 With Figure 6 The tail end of the lock catch plate 2 is integrally formed with a cooperation shaft 22, and a ring groove is formed in the middle of the cooperation shaft 22. The driving rod 32 is hinged at the ring groove, thereby preventing the driving rod 32 from easily moving along the axial direction of the cooperation shaft 22. The unlocking button 31 is located on one side of the second mounting cavity 42 and is integrally formed with two protrusions 33, and the driving rod 32 is located between the two protrusions 33 and is hingedly connected through the pin shaft, thereby further preventing the driving rod 32 from easily moving along the axial direction of the cooperation shaft 22 and improving the stability of the driving rod 32 during transmission.

[0037] A cooperation hole 34 is formed in the driving rod 32 for inserting the cooperation shaft 22, and the hole diameter of the cooperation hole 34 is the same as the outer diameter of the ring groove of the cooperation shaft 22. Since the second mounting cavity 42 is an inclined cavity compared with the first mounting cavity 11, the cooperation hole 34 is a waist-shaped hole, thereby preventing the driving rod 32 from being stuck when driving the lock catch plate 2 to rotate and ensuring the smoothness of the driving rod 32 when driving the lock catch plate 2 to rotate. Similarly, the hole for hingedly connecting the driving rod 32 with the protrusions 33 is also a waist-shaped hole.

[0038] In combination Figure 2 With reference to Figure 5 With Figure 6 The driving rod 32 is made of plastic, and a clamping groove 35 is formed in one end of the driving rod 32 close to the cooperation shaft 22, the clamping groove 35 is in communication with the cooperation hole 34, and the width of the cooperation hole is smaller than the width of the waist-shaped hole. During installation, the cooperation shaft 22 is inserted into the clamping groove 35 by force, and the cooperation shaft 22 passes through the clamping groove 35 and enters the cooperation hole 34, thereby improving the convenience during assembly. When the driving rod 32 drives the lock catch plate 2 to rotate, since the width of the clamping groove 35 is smaller than the width of the cooperation hole 34, the driving rod 32 will not lose the hinged relationship with the cooperation shaft 22.

[0039] The implementation principle of the DC charging gun in the embodiment of the present application is that the unlocking button 31 is arranged on the inner side (i.e. the lower side) of the handle 4, so that even if there is a gap between the unlocking button 31 and the handle 4, rainwater cannot easily penetrate. The second mounting cavity 42 where the unlocking button 31 is arranged is not provided with electronic components, and the electronic components are all arranged in the first mounting cavity 11, so that even if rainwater enters the second mounting cavity 42, the electronic components will not be affected, and the second mounting cavity 42 arranged obliquely cannot easily cause the rainwater entering the second mounting cavity 42 to enter the first mounting cavity 11 and damage the electronic components, thereby improving the waterproof performance and service life of the charging gun. If rainwater enters the second cavity, the rainwater can be automatically discharged through the drain hole 43, and under normal circumstances, the drain hole 43 is blocked by the rubber plug 44 to prevent dust from entering. Since the user must hold the handle 4 when plugging in or unplugging the charging gun, and the unlocking button 31 is arranged inside the handle 4, the user can press the unlocking button 31 to achieve unlocking when holding the handle 4, the palm can hold the handle 4 better and fit the handle 4 better, and it is easier to exert force when unplugging the charging gun.

[0040] Equivalently, the components included in the "assembly", "mechanism", "device" of the present disclosure can also be flexibly combined, that is, they can be produced modularly according to actual conditions, and assembled as an independent module; or they can be assembled separately to form a module in the device. The division of the above components in the present disclosure is only one embodiment, for the convenience of reading, and is not a limitation on the scope of protection of the present disclosure. As long as the above components are included and have the same effect, it should be understood that it is an equivalent technical solution of the present disclosure.

[0041] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0042] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0043] In the present disclosure, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" should be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0044] In the present disclosure, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] It should be noted that when an element is referred to as "fixed to", "arranged on", "fixed on" or "arranged on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or a middle element can exist at the same time. Further, when an element is considered to be "fixedly connected" to another element, the two can be fixed in a detachable manner, or fixed in a non-detachable manner such as sleeving, clamping, integral forming, welding, etc., which can be realized in conventional technology, and will not be repeated here.

[0046] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist Contradiction, it should be considered as the scope of the present disclosure.

[0047] The above embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, without departing from the utility model concept of the present disclosure, some modifications and improvements can be made, which are within the protection scope of the present disclosure.

Claims

1. A direct current charging gun, characterized in that: The utility model provides a lock, including shell (1), lock plate (2) and unlocking assembly (3), the first installation cavity (11) is equipped with in the shell (1) inside, electronic components are suitable for installing in the first installation cavity (11), the lock plate (2) rotationally installed in the first installation cavity (11), the lock plate (2) front end exposes in air to be suitable for with vehicle cooperation realizes locking, the rear side of shell (1) is equipped with handle (4), handle (4) extends obliquely downward, handle (4) with shell (1) is spaced and is equipped with the hand slot (41) of finger passing through, the second installation cavity (42) is equipped with in handle (4) inside, the second installation cavity (42) is obliquely downward chamber, and with the first installation cavity (11) is communicated, the second installation cavity (42) is away from the cavity wall of first installation cavity (11) and is equipped with drain hole (43), drain hole (43) penetrates handle (4) along the direction of setting up, unlocking assembly (3) includes with the lock plate (2) swing connection's unlocking button (31), the unlocking button (31) slip is equipped in the second installation cavity (42), and the unlocking button (31) is close to the side of hand slot (41) and is exposed in the second installation cavity (42) in hand slot (41) with the second installation cavity (42); When the user holds handle (4), the inside of finger will apply the pressing force to the unlocking button (31) drive the unlocking button (31) to the inside of second installation cavity (42) moves, to make the unlocking button (31) drive the lock plate (2) rotates and realizes unlocking.

2. The DC charging gun according to claim 1, characterized in that: The third installation cavity (13) is equipped with in the shell (1) inside, the side of third installation cavity (13) is equipped with the partition plate close to the first installation cavity (11), the through -thread hole (14) of making the first installation cavity (11) and the third installation cavity (13) is communicated is equipped on the partition plate, the third installation cavity (13) is installed with charging plug and cable.

3. The DC charging gun of claim 1, characterized in that: The top of first installation cavity (11) penetrates shell (1), and the first cover plate (12) is welded and fixed at the opening of the top of first installation cavity (11).

4. The DC charging gun of claim 1, wherein: The rubber plug (44) is closely inserted in the drain hole (43), and one end of the rubber plug (44) protrudes out of the drain hole (43) and is exposed to the air.

5. The DC charging gun according to any one of claims 1-4, characterized in that: The unlocking assembly (3) further includes a drive rod (32), the drive rod (32) is rotatably installed in the second installation cavity (42), one side of the drive rod (32) is hingedly connected with the lock plate (2), and the other side of the drive rod (32) is hingedly connected with the unlocking button (31).

6. The DC charging gun of claim 5, characterized in that: The lock plate (2) is fixedly provided with a matching shaft (22) at the tail end, a matching hole (34) is formed in the drive rod (32) for inserting the matching shaft (22), and the matching hole (34) is a waist-shaped hole; a clamping groove (35) is formed in one end of the drive rod (32) close to the matching shaft (22), the clamping groove (35) is in communication with the matching hole (34), and the width of the clamping groove (35) is smaller than the diameter of the matching hole (34).

7. The DC charging gun of claim 6, characterized in that: The matching shaft (22) is provided with a ring groove, and the driving rod (32) is hinged in the ring groove, so that the driving rod (32) is not easy to move along the axial direction of the matching shaft (22).

8. The DC charging gun of claim 5, characterized in that: The unlocking button (31) is located on one side of the second mounting cavity (42) and is provided with two protrusions (33) at intervals, and the driving rod (32) is located between the two protrusions (33) and is hingedly connected with the two protrusions (33).

9. The DC charging gun of claim 5, characterized in that: The second mounting cavity (42) is provided with a reset spring (47), and the reset spring (47) is suitable for driving the unlocked button (31) to reset after sliding; and the bottom of the tail end of the lock plate (2) is provided with a driving spring (21), and the driving spring (21) is suitable for driving the lock plate (2) to reset after rotating to keep the locked state.

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