CN219180049U

CN219180049U - Speed measuring device

Info

Publication number: CN219180049U
Application number: CN202320188050.1U
Authority: CN
Inventors: 郑丽云; 湛慧; 金丽莲
Original assignee: Zhejiang Dahua Technology Co Ltd
Current assignee: Zhejiang Dahua Technology Co Ltd
Priority date: 2023-01-28
Filing date: 2023-01-28
Publication date: 2023-06-13
Anticipated expiration: 2033-01-28

Abstract

The utility model provides a speed measuring device which comprises a shell, a battery module and a shielding part, wherein the shell is provided with a storage groove, and a notch of the storage groove is formed in the side wall surface of the shell; the battery module is arranged at the storage groove in a pluggable manner, and has a storage state of being inserted into the storage groove and a pulled-out state of being pulled out from the storage groove; the shielding part is provided with a shielding plate which is arranged at the notch of the storage groove in an openable and closable manner, the shielding plate is provided with a closing state for closing the notch of the storage groove, and the shielding plate is provided with an opening state for opening the notch of the storage groove; when the battery module is in a storage state, the shielding plate is in an open state, and when the battery module is in a pulling-out state, the shielding plate is in a closed state. The utility model solves the problem that the foreign matters are easy to enter at the notch of the storage groove due to lack of protection after the battery module in the prior art is taken out from the storage groove.

Description

Speed measuring device

Technical Field

The utility model relates to the technical field of intelligent transportation, in particular to a speed measuring device.

Background

In the prior art, a speed measuring device is generally applied in the intelligent traffic field to take a candid photograph and measure the speed of the passed vehicle, so that traffic management personnel can monitor the overspeed behavior of the vehicle conveniently. The common speed measuring device generally comprises a camera, a speed measuring radar and a battery, when the electric quantity of the battery is exhausted, the battery needs to be replaced by a new battery or the pulled battery needs to be charged, when the battery is taken out from the installation box and is not timely installed with the new battery, the opening of the battery box is easy to enter water or dust and other foreign matters due to lack of a protective piece, and the speed measuring device is damaged when serious.

Disclosure of Invention

The utility model mainly aims to provide a speed measuring device which solves the problem that foreign matters are easy to enter at the opening of a battery box due to lack of protection after the battery in the prior art is taken out of the installation box.

In order to achieve the above object, the present utility model provides a speed measuring device, including a housing, a battery module, and a shielding portion, wherein the housing has a receiving groove, and a notch of the receiving groove is opened on a side wall surface of the housing; the battery module is arranged at the storage groove in a pluggable manner, and has a storage state of being inserted into the storage groove and a pulled-out state of being pulled out from the storage groove; the shielding part is provided with a shielding plate which is arranged at the notch of the storage groove in an openable and closable manner, the shielding plate is provided with a closing state for closing the notch of the storage groove, and the shielding plate is provided with an opening state for opening the notch of the storage groove; when the battery module is in a storage state, the shielding plate is in an open state, and when the battery module is in a pulling-out state, the shielding plate is in a closed state.

Further, the shielding plate is arranged at the notch of the storage groove in a reversible manner, the shielding plate has an opening state of being turned over along a first direction and avoiding the plugging path of the battery module, and the shielding plate has a closing state of being turned over along a second direction and shielding the notch of the storage groove, and the second direction is opposite to the first direction.

Further, the first direction is a direction in which the shielding plate rotates toward the inside of the receiving groove, so as to provide a force for the shielding plate to turn in the first direction when the battery module is inserted into the receiving groove.

Further, the outer contour line of the shielding plate is matched with the notch contour line of the containing groove.

Further, the shell is also provided with a containing cavity which is communicated with the containing groove, and the shielding part also comprises a fixed base which is arranged on the cavity wall surface of the containing cavity; the shielding plate is pivotally connected with the fixed base, so that the shielding plate can be arranged at the notch of the storage groove in a turnover mode.

Further, the fixed base is provided with a first installation area and a second installation area, wherein the first installation area is used for being connected with the cavity wall surface of the accommodating cavity, the second installation area is provided with an installation groove, the shielding part further comprises a connecting shaft and a first spring, the connecting shaft is sleeved on a pin shaft at the installation groove, and the shielding plate is connected with the connecting shaft; the first spring is sleeved on the outer peripheral side of the connecting shaft, the first end of the first spring is abutted against the groove wall surface of the mounting groove on the side far away from the shielding plate, and the second end of the first spring is abutted against the surface of the shielding plate on the side facing the storage groove, so that when the shielding plate is switched from the opening state to the closing state, the first spring provides acting force for the shielding plate to rotate along the second direction.

Further, the battery module is provided with an insertion end and a buckling end, wherein the insertion end is arranged towards one side of a notch of the storage groove, and the buckling end is far away from one side of the insertion end, so that when the battery module is stored in the storage groove, the buckling end is positioned at the notch of the storage groove.

Further, the buckling end is provided with a telescopic ground bolt end, a limiting groove is formed in the position, opposite to the bolt end, of the notch of the storage groove, and the bolt end can extend into the limiting groove to limit the battery module at the storage groove.

Further, the battery module comprises a battery body and a connecting structure, wherein the battery body is provided with an insertion end; the connecting structure is connected with one side of the battery body far away from the insertion end to form a buckling end, the cross section area of the cross section of the connecting structure is larger than that of the battery body, and the bolt end is retractably arranged on the side wall surface of the connecting structure.

Further, the connecting structure comprises a base, a bolt structure and a cover plate, wherein the base is provided with an accommodating groove and a guide groove communicated with the accommodating groove, and a first guide column is convexly arranged at the edge of the notch side of the accommodating groove; the bolt structure comprises a body structure, a bolt plate body and a second spring, wherein the body structure is arranged in the accommodating groove in a sliding manner, the bolt plate body and the second spring are respectively positioned at two ends of the body structure in the sliding direction, so that the bolt plate body forms a bolt end, the second spring is positioned in the guide groove, the first end of the second spring is abutted with the end face of a second guide post of the body structure extending into the guide groove, the second end of the second spring is abutted with the groove wall surface of one side of the guide groove far away from the body structure, a waist-shaped hole is formed at the position of the bolt plate body, opposite to the first guide post, the first guide post penetrates through the waist-shaped hole, and the extending direction of the waist-shaped hole is consistent with the sliding direction of the body structure; the apron lid is established on the base, and apron and body structure's relative position department has dodges the through-hole, and body structure has the bellying, and the bellying stretches out and dodges the through-hole setting in order to form the buckle end.

Further, the body structure is provided with an avoidance groove, the edge of the groove wall surface of the first side of the avoidance groove is connected with the bolt plate body, and the groove wall surface of the second side of the avoidance groove is higher than the groove wall surface of the first side to form a protruding part.

Further, the bolt structure is two, and two bolt structure interval sets up, and the bolt plate body of two bolt structures sets up towards opposite direction, and the holding tank is two, and two holding tanks set up with two bolt structures one-to-one.

By adding the shielding part on the speed measuring device, the battery module is arranged at the storage groove of the shell in a pluggable manner, the battery module has a storage state of being inserted into the storage groove, and the battery module has a pull-out state of being pulled out from the storage groove; the shielding plate of the shielding part is arranged at the notch of the containing groove in an openable and closable manner, and has a closing state for closing the notch of the containing groove and an opening state for opening the notch of the containing groove; when the battery module is in a storage state, the shielding plate is in an open state, and the battery module at least partially enters the storage groove and shields the notch of the storage groove; when the battery module is in a pulled-out state and a new battery module is not installed in time, the shielding plate is in a closed state, the shielding plate shields the notch of the storage groove, foreign matters such as water or dust are prevented from entering the storage groove, and the speed measuring device is protected.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic view of a speed measuring device according to an alternative embodiment of the present utility model when a battery module is in a storage state;

fig. 2 is a schematic view showing a state structure of the battery module in fig. 1 at a certain point in time during the switching from the storage state to the pulled-out state;

fig. 3 is a schematic view showing the structure of the battery module of fig. 1 in a pulled-out state;

FIG. 4 shows an enlarged schematic view of the structure at C in FIG. 3;

FIG. 5 shows a schematic view of the internal structure of the speed measuring device of FIG. 1 from another perspective;

fig. 6 is a schematic view showing an internal structure of the speed measuring device of fig. 5 after the battery module is pulled out;

FIG. 7 is a schematic view showing a structure of a shutter of the shutter portion in FIG. 5 in an opened state;

FIG. 8 is a schematic view showing a structure of a shutter of the shutter portion in FIG. 6 in a closed state;

fig. 9 is a schematic view showing the structure of a battery module of the speed measuring device of fig. 1;

fig. 10 shows a schematic structural view of an insertion end side of the battery module in fig. 9;

fig. 11 is a schematic view showing an exploded structure of the snap-fit end side of the battery module in fig. 9;

fig. 12 is a schematic structural view showing a connection structure of the battery module of fig. 9;

FIG. 13 shows an exploded view of the connection structure of FIG. 12;

FIG. 14 shows a schematic structural view of the latch structure of the connection structure of FIG. 13;

fig. 15 shows a schematic structural view of another view of the latch structure of fig. 14.

Wherein the above figures include the following reference numerals:

10. a housing; 11. a storage groove; 111. a limit groove; 12. a receiving chamber;

20. a battery module; 21. a battery body; 211. a guide groove; 212. a power supply interface; 22. a connection structure; 221. a base; 2211. a receiving groove; 2212. a guide groove; 2213. a first guide post; 222. a latch structure; 2221. a body structure; 22211. a second guide post; 22212. a boss; 22213. avoiding the groove; 2222. a latch plate body; 22221. a plug pin end; 22222. a waist-shaped hole; 2223. a second spring; 223. a cover plate; 2231. avoiding the through hole; 2232. mylar;

30. a shielding part; 31. a shielding plate; 32. a fixed base; 321. a first mounting area; 322. a second mounting area; 3221. a mounting groove; 33. a connecting shaft; 34. a first spring;

40. a camera; 50. and (5) a speed measuring radar.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a speed measuring device, which aims to solve the problem that foreign matters are easy to enter at an opening of a battery box due to lack of protection after the battery in the prior art is taken out of the installation box.

As shown in fig. 1 to 15, the speed measuring device includes a housing 10, a battery module 20, and a shielding portion 30, wherein the housing 10 has a receiving groove 11, and a notch of the receiving groove 11 is opened at a side wall surface of the housing 10; the battery module 20 is provided at the storage groove 11 so as to be pluggable, the battery module 20 has a storage state in which it is inserted into the storage groove 11, and the battery module 20 has an extracted state in which it is extracted from the storage groove 11; the shielding portion 30 has a shielding plate 31, the shielding plate 31 being openably and closably provided at the notch of the storage tank 11, the shielding plate 31 having a closed state closing the notch of the storage tank 11, and the shielding plate 31 having an open state opening the notch of the storage tank 11; wherein, when the battery module 20 is in the storage state, the shielding plate 31 is in the open state, and when the battery module 20 is in the extraction state, the shielding plate 31 is in the closed state.

By adding the shielding part 30 to the speed measuring device, the battery module 20 is provided at the receiving groove 11 of the housing 10 in a pluggable manner, the battery module 20 has a receiving state of being inserted into the receiving groove 11, and the battery module 20 has an extracted state of being extracted from the receiving groove 11; the shielding plate 31 of the shielding part 30 is openably and closably provided at the notch of the receiving groove 11, the shielding plate 31 having a closed state closing the notch of the receiving groove 11, and the shielding plate 31 having an open state opening the notch of the receiving groove 11; when the battery module 20 is in the storage state, the shielding plate 31 is in the open state, and the battery module 20 at least partially enters the storage groove 11 and shields the notch of the storage groove 11; when the battery module 20 is in a pulled-out state and a new battery module 20 is not mounted in time, the shielding plate 31 is in a closed state, the shielding plate 31 shields the notch of the storage groove 11, foreign matters such as water or dust are prevented from entering the storage groove 11, and the speed measuring device is protected.

Preferably, the battery in the battery module 20 is a lithium battery.

It should be noted that, in the present application, the speed measuring device further includes a camera 40 and a speed measuring radar 50, the camera 40 is used for capturing images of the passing vehicle, and the speed measuring radar 50 is used for measuring the speed of the passing vehicle.

As shown in fig. 5 to 8, the shielding plate 31 is provided at the notch of the receiving groove 11 so as to be reversible, the shielding plate 31 has an open state of being turned over in the first direction a and avoiding the insertion and extraction path of the battery module 20, and the shielding plate 31 has a closed state of being turned over in the second direction B opposite to the first direction a and shielding at the notch of the receiving groove 11. In this way, switching between the open state and the closed state is achieved by the turning movement of the shutter 31.

As shown in fig. 5 and 6, the first direction a is a direction in which the shielding plate 31 rotates toward the inside of the receiving groove 11 to provide a force to turn the shielding plate 31 in the first direction a when the battery module 20 is inserted into the receiving groove 11. In this way, the shielding plate 31 can be protected by rotating the shielding plate 31 into the storage groove 11, and the shielding plate 31 is prevented from being easily damaged due to the rotation of the shielding plate 31 to the outside of the storage groove 11.

Preferably, the flip angle of the shielding plate 31 is 90 °.

As shown in fig. 6, the outer contour of the shielding plate 31 is adapted to the notch contour of the receiving groove 11. In this way, the shielding plate 31 is ensured to completely shield the notch of the receiving groove 11.

As shown in fig. 5 and 6, the housing 10 further has a receiving chamber 12, and the receiving chamber 12 communicates with the receiving groove 11, and the shielding portion 30 further includes a fixing base 32, where the fixing base 32 is disposed on a chamber wall surface of the receiving chamber 12; wherein the shielding plate 31 is pivotally connected with the fixed base 32, so that the shielding plate 31 is disposed at the notch of the receiving groove 11 in a reversible manner.

As shown in fig. 5 to 8, the fixing base 32 has a first mounting region 321 and a second mounting region 322, wherein the first mounting region 321 is used for being connected with a cavity wall surface of the accommodating cavity 12, the second mounting region 322 has a mounting groove 3221, the shielding part 30 further comprises a connecting shaft 33 and a first spring 34, wherein the connecting shaft 33 is sleeved on a pin shaft at the mounting groove 3221, and the shielding plate 31 is connected with the connecting shaft 33; the first spring 34 is sleeved on the outer peripheral side of the connecting shaft 33, and a first end of the first spring 34 is abutted with a groove wall surface of the mounting groove 3221 on the side far away from the shielding plate 31, and a second end of the first spring 34 is abutted with a surface of the shielding plate 31 on the side facing the accommodating groove 11, so that when the shielding plate 31 is switched from the open state to the closed state, the first spring 34 provides a rotating acting force in the second direction B for the shielding plate 31.

Thus, when the battery module 20 is switched from the pulled-out state to the storage state, the shielding plate 31 is turned over into the storage groove 11 along with the insertion of the battery module 20, the shielding plate 31 is attached to the outer surface of the battery module 20, and the shielding plate 31 can be directly pushed to be opened when the battery module 20 is inserted along the first direction A, and the operation of independently opening the shielding plate 31 is not required; when the battery module 20 is switched from the storage state to the extraction state, the shielding plate 31 can automatically turn over and shield the notch of the storage groove 11 along with the extraction of the battery module 20, so that external foreign matters are prevented from entering the storage groove 11, the operation of independently closing the shielding plate 31 is not needed, and the battery module 20 is convenient to disassemble and assemble.

As shown in fig. 9, the battery module 20 has an insertion end and a fastening end, wherein the insertion end is disposed toward one side of the slot of the receiving groove 11, and the fastening end is disposed away from one side of the insertion end, so that the fastening end is located at the slot of the receiving groove 11 when the battery module 20 is received in the receiving groove 11.

Preferably, the end face shape of the insertion end is adapted to the shape of the shielding plate 31.

As shown in fig. 3, 4 and 9, the fastening end has a telescopically arranged plug end 22221, and the notch of the receiving slot 11 has a limiting slot 111 at a position opposite to the plug end 22221, and the plug end 22221 can extend into the limiting slot 111 to limit the battery module 20 at the receiving slot 11. In this way, the stability of the connection of the battery module 20 with the case 10 is ensured.

In this application, the end surface of the plug end 22221 is an inclined surface, and the plug end 22221 can slide and rebound directly pushed into the battery module 20, so as to reduce the insertion resistance of the plug end 22221.

As shown in fig. 11 to 13, the battery module 20 includes a battery body 21 and a connection structure 22, wherein the battery body 21 has an insertion end; the connecting structure 22 is connected with one side of the battery body 21 away from the insertion end to form a buckling end, and the cross section of the connecting structure 22 is larger than that of the battery body 21, and the plug pin end 22221 is telescopically arranged on the side wall surface of the connecting structure 22. Thus, the plug end 22221 can be retracted into the side wall surface of the connection structure 22 to ensure that the battery module 20 is smoothly inserted into or pulled out of the storage groove 11, and the plug end 22221 can extend out of the side wall surface of the connection structure 22 to be matched and fixed with the limit groove 111.

In this application, the battery body 21 has a guide groove 211, and a side wall of the receiving groove 11 has a guide protrusion corresponding to the guide groove 211, and the guide groove 211 is engaged with the guide protrusion to correctly insert the battery body 21 into the receiving groove 11.

It should be noted that, in the present application, the battery body 21 has a power supply interface 212, the power supply interface 212 is located at an end far away from the connection structure 22, and the battery body 21 provides electric energy for the camera 40 and the speed measuring radar 50 through the power supply interface 212.

As shown in fig. 11 to 15, the connection structure 22 includes a base 221, a latch structure 222, and a cover plate 223, wherein the base 221 has a receiving groove 2211 and a guide groove 2212 communicating with the receiving groove 2211, and a first guide post 2213 is provided protruding at a notch side edge of the receiving groove 2211; the plug structure 222 includes a body structure 2221, a plug plate body 2222, and a second spring 2223, where the body structure 2221 is slidably disposed in the accommodating groove 2211, the plug plate body 2222 and the second spring 2223 are respectively located at two ends of the body structure 2221 in the sliding direction, so that the plug plate body 2222 forms a plug end 22221, the second spring 2223 is located in the guide groove 2212, and a first end of the second spring 2223 abuts against an end surface of a second guide column 22211 of the body structure 2221 extending into the guide groove 2212, a second end of the second spring 2223 abuts against a groove wall surface of the guide groove 2212 on a side far away from the body structure 2221, a waist-shaped hole 22222 is formed at a position of the plug plate body 2222 opposite to the first guide column 2213, the first guide column 2213 passes through the waist-shaped hole 22222, and the extending direction of the waist-shaped hole 22222 is consistent with the sliding direction of the body structure 2221; the cover plate 223 is covered on the base 221, the position of the cover plate 223 opposite to the body structure 2221 is provided with a avoidance through hole 2231, the body structure 2221 is provided with a protruding part 22212, and the protruding part 22212 extends out of the avoidance through hole 2231 to form a buckling end. Thus, the body structure 2221 is slidably disposed within the receiving groove 2211, and the first guide post 2213 slides within the waist-shaped hole 22222, ensuring that the plug end 22221 can be switched between being in the side wall surface of the retraction coupling structure 22 and being out of the side wall surface of the extension coupling structure 22.

In the present application, the base 221 and the cover 223 are fixed by screws.

In this application, body structure 2221 and latch plate 2222 integrated into one piece, it is convenient to dismantle.

In this application, an end of the protruding portion 22212 away from the second guiding column 22211 is a C-shaped groove, so as to form a clasp end that is convenient for a finger to clasp and not easy to release.

In this application, the handle end is embedded in the avoidance through hole 2231, saving space, and facilitating miniaturization of the product.

As shown in fig. 11, in the present application, a side surface of the cover plate 223 remote from the base 221 is attached with a mylar sheet 2232.

As shown in fig. 14, the body structure 2221 has a relief groove 22213, and an edge of a groove wall surface on a first side of the relief groove 22213 is connected to the plug board body 2222, and a groove wall surface on a second side of the relief groove 22213 is higher than the groove wall surface on the first side to form a boss 22212. In this way, the relief groove 22213 may provide a relief space for the manipulation knob end.

As shown in fig. 12 and 13, the number of the latch structures 222 is two, the two latch structures 222 are arranged at intervals, the latch plate bodies 2222 of the two latch structures 222 are arranged in opposite directions, the number of the accommodating grooves 2211 is two, and the two accommodating grooves 2211 are arranged in one-to-one correspondence with the two latch structures 222. In this way, opposite forces are applied to the two clasp ends, the two second springs 2223 are compressed under force, the two plug ends 22221 retract into the side wall surface of the connection structure 22, and then forces in the second direction B are applied to the two clasp ends, so as to ensure that the battery module 20 is smoothly pulled out of the receiving slot 11.

From the above description, it can be seen that the above embodiments in the present application achieve the following technical effects: by adding the shielding part 30 to the speed measuring device, the battery module 20 is provided at the receiving groove 11 of the housing 10 in a pluggable manner, the battery module 20 has a receiving state of being inserted into the receiving groove 11, and the battery module 20 has an extracted state of being extracted from the receiving groove 11; the shielding plate 31 of the shielding part 30 is openably and closably provided at the notch of the receiving groove 11, the shielding plate 31 having a closed state closing the notch of the receiving groove 11, and the shielding plate 31 having an open state opening the notch of the receiving groove 11; when the battery module 20 is in the storage state, the shielding plate 31 is in the open state, and the battery module 20 at least partially enters the storage groove 11 and shields the notch of the storage groove 11; when the battery module 20 is in a pulled-out state and a new battery module 20 is not mounted in time, the shielding plate 31 is in a closed state, the shielding plate 31 shields the notch of the storage groove 11, foreign matters such as water or dust are prevented from entering the storage groove 11, and the speed measuring device is protected.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A speed measuring device, comprising:

a housing (10), wherein the housing (10) is provided with a receiving groove (11), and a notch of the receiving groove (11) is formed on a side wall surface of the housing (10);

a battery module (20), the battery module (20) being provided at the storage groove (11) so as to be pluggable, the battery module (20) having a storage state in which it is inserted into the storage groove (11), and the battery module (20) having an extracted state in which it is extracted from the storage groove (11);

a shielding part (30), wherein the shielding part (30) is provided with a shielding plate (31), the shielding plate (31) is arranged at the notch of the containing groove (11) in an openable and closable manner, the shielding plate (31) is provided with a closing state for closing the notch of the containing groove (11), and the shielding plate (31) is provided with an opening state for opening the notch of the containing groove (11);

wherein the shielding plate (31) is in the open state when the battery module (20) is in the housed state, and the shielding plate (31) is in the closed state when the battery module (20) is in the pulled-out state.

2. The speed measuring device according to claim 1, wherein the shielding plate (31) is provided in a reversible manner at the notch of the receiving groove (11), the shielding plate (31) has an open state of being turned in a first direction and avoiding the insertion/extraction path of the battery module (20), and the shielding plate (31) has a closed state of being turned in a second direction opposite to the first direction and shielding the notch of the receiving groove (11).

3. A speed measuring device according to claim 2, wherein the first direction is a direction in which the shielding plate (31) rotates toward the inside of the receiving groove (11) to provide a force for turning the shielding plate (31) in the first direction when the battery module (20) is inserted into the receiving groove (11).

4. The speed measuring device according to claim 1, characterized in that the outer contour of the shielding plate (31) is adapted to the notch contour of the receiving groove (11).

5. The speed measuring device according to claim 1, wherein the housing (10) further has a receiving chamber (12), and the receiving chamber (12) communicates with the receiving groove (11), and the shielding portion (30) further includes:

a fixed base (32), wherein the fixed base (32) is arranged on the cavity wall surface of the accommodating cavity (12);

wherein the shielding plate (31) is pivotally connected with the fixed base (32) so that the shielding plate (31) can be arranged at the notch of the containing groove (11) in a turnover manner.

6. The speed measuring device according to claim 5, wherein the fixed base (32) has a first mounting area (321) and a second mounting area (322), wherein the first mounting area (321) is for connection with a cavity wall surface of the accommodating cavity (12), the second mounting area (322) has a mounting groove (3221), and the shielding portion (30) further comprises:

the connecting shaft (33), the connecting shaft (33) is sleeved on a pin shaft at the mounting groove (3221), and the shielding plate (31) is connected with the connecting shaft (33);

the first spring (34), the cover of first spring (34) is established the periphery side of connecting axle (33), just the first end of first spring (34) with mounting groove (3221) is kept away from the cell wall face butt of shielding plate (31) one side, the second end of first spring (34) with shielding plate (31) orientation accomodate the surface butt of groove (11) one side, in order to when shielding plate (31) are by opening state switch over to the closed state, first spring (34) is for shielding plate (31) provides along the effort of second direction pivoted.

7. The speed measuring device according to any one of claims 1 to 6, wherein the battery module (20) has an insertion end and a snap-in end, wherein the insertion end is disposed toward a notch side of the receiving groove (11), and the snap-in end is disposed away from the insertion end side so that the snap-in end is located at the notch of the receiving groove (11) when the battery module (20) is received into the receiving groove (11).

8. The speed measuring device according to claim 7, wherein the fastening end is provided with a telescopic ground bolt end (22221), a limiting groove (111) is formed at a position, opposite to the bolt end (22221), of the notch of the accommodating groove (11), and the bolt end (22221) can extend into the limiting groove (111) to limit the battery module (20) at the accommodating groove (11).

9. The speed measuring device according to claim 8, wherein the battery module (20) includes:

-a battery body (21), said battery body (21) having said insertion end;

the connecting structure (22), the connecting structure (22) with the battery body (21) is kept away from one side of inserting the end is connected in order to form the lock end, just the cross-sectional area of the cross section of connecting structure (22) is greater than the cross-sectional area of the cross section of battery body (21), bolt end (22221) telescopic setting is in on the lateral wall face of connecting structure (22).

10. The speed measuring device according to claim 9, wherein the connecting structure (22) comprises:

a base (221), the base (221) having a receiving groove (2211) and a guide groove (2212) communicating with the receiving groove (2211), the receiving groove (2211) being provided with a first guide post (2213) protruding at a notch side edge;

the plug structure (222), the plug structure (222) comprises a body structure (2221), a plug plate body (2222) and a second spring (2223), wherein the body structure (2221) is arranged in the accommodating groove (2211) in a sliding manner, the plug plate body (2222) and the second spring (2223) are respectively positioned at two ends of the body structure (2221) in the sliding direction, so that the plug plate body (2222) forms a plug end (22221), the second spring (2223) is positioned in the guide groove (2212), the first end of the second spring (2223) is in butt joint with the end face of a second guide column (22211) in the guide groove (2212), the second end of the second spring (2223) is in butt joint with the groove wall surface of one side of the guide groove (2212) away from the body structure (2221), the second end of the second spring (2222) is in butt joint with the groove wall surface of the waist column (2222), the waist column (2222) is arranged at a position opposite to the first guide groove (2213), and the waist column (22) is arranged in the direction opposite to the waist column (2211), and the waist column (22) is provided with a hole (22) in the sliding direction;

the cover plate (223), the cover plate (223) is covered and is established on base (221), cover plate (223) with body structure (2221) relative position department has dodges through-hole (2231), body structure (2221) has bellying (22212), bellying (22212) stretches out dodge through-hole (2231) setting in order to form the knot hand.

11. The speed measuring device according to claim 10, wherein the body structure (2221) has a relief groove (22213), an edge of a groove wall surface of a first side of the relief groove (22213) is connected with the plug board body (2222), and a groove wall surface of a second side of the relief groove (22213) is higher than the groove wall surface of the first side to form the protruding portion (22212).

12. The speed measuring device according to claim 10, wherein the number of the pin structures (222) is two, the two pin structures (222) are arranged at intervals, the pin plates (2222) of the two pin structures (222) are arranged in opposite directions, the number of the receiving grooves (2211) is two, and the two receiving grooves (2211) are arranged in one-to-one correspondence with the two pin structures (222).