Compact laser distance measuring device

Abstract

The utility model provides a compact structure's laser range finder, and circuit board and optical collimating mirror structure are connected in the inside of shell, one side of circuit board is connected with TOF chip, and the other side of circuit board is connected with connecting terminal. The side of fixing piece is provided with fixed slot, and the other side of fixing piece is provided with first limit portion and second limit portion. The first limit slot inside of first limit portion is connected with transmitting optical lens, and the second limit slot inside of second limit portion is connected with receiving optical lens. The side of first limit portion is provided with transmitting light hole, and the side of second limit portion is provided with receiving light hole, and TOF chip is connected in the inside of fixed slot. The side of shell is provided with jack, and the position of jack corresponds with the position of connecting terminal, and the other side of shell is provided with opening, and the position of opening corresponds with the position of transmitting light hole and receiving light hole, and first connecting portion is connected with nut thread.

Description

Technical Field

[0001] This utility model relates to the field of laser ranging equipment technology, and in particular to a compact laser ranging device. Background Technology

[0002] In modern society, laser rangefinders are high-precision distance measurement devices based on laser technology. The basic principle of a laser rangefinder is to calculate the distance between the target object and the measuring device by emitting a laser beam and measuring the time difference (Time of Flight, TOF) between the emitted and received reflected light. To ensure that the emitted laser and the received reflected light travel along the same optical path, multiple optical elements are required inside the laser rangefinder. These additional optical elements increase the overall size of the laser rangefinder, making it difficult for existing laser rangefinders to meet the miniaturization and integration requirements of modern devices. Therefore, existing laser rangefinders suffer from the technical problem of large size.

[0003] Therefore, there is a need to provide a compact laser ranging device to solve the above-mentioned technical problems. Utility Model Content

[0004] This invention provides a compact laser ranging device, which effectively solves the technical problem of the large size of existing laser ranging devices.

[0005] This utility model provides a compact laser ranging device, which includes,

[0006] shell;

[0007] A circuit board is connected inside the housing and connected to the optical collimating lens structure. A TOF chip is connected to one side of the circuit board, and a connection terminal is connected to the other side of the circuit board.

[0008] The optical collimating lens structure is connected to the interior of the housing. The optical collimating lens structure includes a fixing member, a emitting optical lens, and a receiving optical lens. A fixing groove is provided on one side of the fixing member, and a first limiting part and a second limiting part are provided on the other side of the fixing member. A first limiting groove is provided inside the first limiting part, and a second limiting groove is provided inside the second limiting part. The emitting optical lens is connected to the interior of the first limiting groove, and the receiving optical lens is connected to the interior of the second limiting groove. A light-transmitting aperture is provided on one side of the first limiting part, and a light-transmitting aperture is provided on one side of the second limiting part. The TOF chip is connected to the interior of the fixing groove.

[0009] A socket is provided on one side of the housing, and the position of the socket corresponds to the position of the connection terminal. An opening is provided on the other side of the housing, and the position of the opening corresponds to the position of the light transmitting hole and the light receiving hole.

[0010] The laser ranging device also includes a nut. The outer shell includes a first connecting part and a second connecting part that are connected to each other. The second connecting part is in the shape of a flat disc and its diameter is larger than the inner diameter of the nut. The first connecting part is threadedly connected to the nut, thereby fixing the laser ranging device in the required position.

[0011] Furthermore, the opening of the outer shell is racetrack shaped.

[0012] Furthermore, the fixing member also includes an isolation block, which is disposed between the first limiting part and the second limiting part, and the emitting optical lens and the receiving optical lens are isolated by the isolation block;

[0013] The isolation block includes a transmitting mating part, which is disposed on one side of the isolation block. The transmitting mating part has an arc-shaped structure, and the first limiting part also has an arc-shaped structure. The transmitting mating part and the first limiting part are connected to form an annular structure surrounding the transmitting optical lens.

[0014] Furthermore, the isolation block includes a receiving mating part, and the transmitting mating part is disposed on the other side of the isolation block relative to the transmitting mating part. The receiving mating part has an arc-shaped structure, and the second limiting part also has an arc-shaped structure. The receiving mating part and the second limiting part are connected to form an annular structure surrounding the receiving optical lens.

[0015] Furthermore, the laser ranging device also includes bolts, the circuit board includes lugs connected to both sides of the circuit board, the lugs are provided with through holes, the inner wall of the housing is connected to a connecting post, the middle of the connecting post is provided with a screw hole, the screw hole communicates with the through hole, and the bolt passes through the through hole and is threadedly connected to the screw hole.

[0016] Furthermore, the nut also includes a plurality of protrusions and a plurality of grooves, which are staggered on the outer side wall of the nut.

[0017] Furthermore, the laser ranging device also includes a sealing element connected to the interior of the housing. The sealing element is located between the opening and the optical collimating lens structure. The position on the sealing element corresponding to the opening is transparent. The sealing element is used to isolate the optical collimating lens structure from the external environment.

[0018] Furthermore, the seal also includes a protrusion, which is a transparent structure. The protrusion is disposed on one side of the seal, and its position corresponds to the position of the opening. The protrusion is connected to the opening.

[0019] Furthermore, the first connecting part includes a first connecting part body and a bottom cover. One end of the first connecting part body is connected to the second connecting part, and the other end of the first connecting part body is detachably connected to the bottom cover. The insertion hole is provided on the bottom cover.

[0020] Furthermore, the first connecting part body is provided with a positioning groove, and the bottom cover is connected with a positioning block. The positioning block is connected to the positioning groove, and the positioning block is used to cooperate with the positioning groove to perform positioning operation on the bottom cover.

[0021] Compared with the prior art, the advantages of this invention are as follows: This invention provides a compact laser ranging device, which includes a housing, a circuit board, an optical collimating lens structure, and a nut. The circuit board and the optical collimating lens structure are connected inside the housing. The optical collimating lens structure is provided with a fixing member, a emitting optical lens, and a receiving optical lens. A fixing groove is provided on one side of the fixing member, and a first limiting part and a second limiting part are provided on the other side of the fixing member. A first limiting groove is provided inside the first limiting part, and a second limiting groove is provided inside the second limiting part. The emitting optical lens is connected inside the first limiting groove, the receiving optical lens is connected inside the second limiting groove, and the TOF chip is connected inside the fixing groove. The laser ranging device does not require a space to accommodate the TOF chip, the emitting optical lens, and the receiving optical lens, thus making the structure of the laser ranging device more compact. This effectively solves the technical problem of the large size of existing laser ranging devices, and the compact structure of this laser ranging device can meet the needs of modern equipment miniaturization and integration. Furthermore, by connecting the nut to the threads on the housing, the user can fix the laser rangefinder in the desired position. For example, by connecting the nut to the threads on the housing, the user can fix the laser rangefinder to the external mounting plate with mounting holes. Users do not need to use other fixing components to secure the laser rangefinder, making installation quite convenient. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0023] Figure 1 This is an exploded view of an embodiment of the compact laser rangefinder of this utility model.

[0024] Figure 2 This is one of the structural diagrams of the optical collimating lens structure of an embodiment of the compact laser ranging device of this utility model.

[0025] Figure 3 This is the second structural diagram of the optical collimating lens structure of an embodiment of the compact laser ranging device of this utility model.

[0026] Figure 4 This is a structural diagram of the housing of an embodiment of the compact laser ranging device of this utility model.

[0027] Figure 5 This is a structural diagram of the bottom cover of an embodiment of the compact laser rangefinder of this utility model.

[0028] Figure 6 This is a structural diagram of a circuit board of an embodiment of the compact laser ranging device of this utility model.

[0029] In the diagram, 10 is the laser rangefinder; 11 is the outer casing; 111 is the first connecting part body; 1111 is the positioning groove; 1112 is the bottom cover; 11121 is the insertion hole; 11122 is the positioning block; 112 is the second connecting part; 1121 is the opening; 113 is the connecting post; 1131 is the screw hole; 12 is the circuit board; 121 is the TOF chip; 122 is the connecting terminal; 123 is the lug; 124 is the through hole; 13 is the optical collimating lens structure; 131 is the fixing component; 1311 is the fixing groove; 13 12. First limiting part; 13121. First limiting groove; 13122. Transmitting light transmission hole; 1313. Second limiting part; 13131. Second limiting groove; 13132. Receiving light transmission hole; 1314. Isolating block; 13141. Transmitting mating part; 13142. Receiving mating part; 132. Transmitting optical lens; 133. Receiving optical lens; 14. Nut; 141. Protrusion; 142. Groove; 15. Seal; 151. Protrusion; 16. Fixing plate; 161. Fixing hole. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0032] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0033] In the diagram, units with similar structures are represented by the same labels.

[0034] Please refer to Figure 1 , Figure 4 and Figure 6 This invention provides a compact laser rangefinder 10, which includes a housing 11, a circuit board 12, an optical collimating lens structure 13, and a nut 14. The circuit board 12 is connected to the interior of the housing 11 and is connected to the optical collimating lens structure 13. A TOF chip 121 is connected to one side of the circuit board 12, and a connection terminal 122 is connected to the other side. The laser rangefinder 10 also includes bolts, and the circuit board 12 includes lugs 123. Lugs 123 are connected to both sides of the circuit board 12, and through holes 124 are provided on the lugs 123. A connecting post 113 is connected to the inner wall of the housing 11. A screw hole 1131 is provided in the middle of the connecting post 113, communicating with the through hole 124. The bolt passes through the through hole 124 and is threaded into the screw hole 1131. Because the circuit board 12 and the housing 11 are connected by bolts, the connection between the circuit board 12 and the housing 11 is relatively stable. Furthermore, it is quite convenient for users to install and remove the circuit board 12 using bolts.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3An optical collimating lens structure 13 is connected to the interior of the housing 11. The optical collimating lens structure 13 includes a fixing member 131, a emitting optical lens 132, and a receiving optical lens 133. A fixing groove 1311 is provided on one side of the fixing member 131, and a first limiting part 1312 and a second limiting part 1313 are provided on the other side of the fixing member 131. A first limiting groove 13121 is provided inside the first limiting part 1312, and a second limiting groove 13131 is provided inside the second limiting part 13131. The emitting optical lens 132 is connected to the interior of the first limiting groove 13121, and the receiving optical lens 133 is connected to the interior of the second limiting groove 13131. A light-transmitting aperture 13122 is provided on one side of the first limiting part 1312, and a light-transmitting aperture 13132 is provided on one side of the second limiting part 1313. The TOF chip 121 is connected to the interior of the fixing groove 1311. Therefore, the laser rangefinder 10 does not require a space to house the TOF chip 121, the emitting optical lens 132, and the receiving optical lens 133, making the structure of the laser rangefinder 10 more compact. This effectively solves the technical problem of the large size of existing laser rangefinders 10.

[0036] exist Figure 1 and Figure 3 Based on this, please combine Figure 5 and Figure 6 A socket 11121 is provided on one side of the housing 11, and the position of the socket 11121 corresponds to the position of the connection terminal 122. A wire can pass through the socket 11121 to electrically connect the connection terminal 122 to an external device. An opening 1121 is provided on the other side of the housing 11, and the position of the opening 1121 corresponds to the positions of the emitting light aperture 13122 and the receiving light aperture 13132. Furthermore, the opening 1121 of the housing 11 is racetrack-shaped. The laser emitted by the TOF chip 121 passes through the emitting optical lens 132 and the emitting light aperture 13122, and the laser can be emitted through the opening 1121. The laser reflected back externally can be received through the opening 1121, and then the laser reflected back externally passes through the receiving light aperture 13132 and the receiving optical lens 133 and is received by the TOF chip 121. By employing a dual-optical-path system, the laser emitting optical path and the laser receiving optical path are independent of each other. The transmitting optical lens 132 is located inside the first limiting groove 13121, and the receiving optical lens 133 is located inside the second limiting groove 13131, which can ensure that the transmitting and receiving optical paths do not interfere with each other.

[0037] Please refer to Figure 1 and Figure 4The outer casing 11 includes a first connecting portion and a second connecting portion 112 that are interconnected. The second connecting portion 112 is in the shape of a flat disc, with an opening 1121 provided on the second connecting portion 112, and the diameter of the second connecting portion 112 is larger than the inner diameter of the nut 14. The first connecting portion is threadedly connected to the nut 14, thereby fixing the laser rangefinder 10 in the desired position. Because the diameter of the second connecting portion 112 is larger than the inner diameter of the nut 14, the second connecting portion 112 can limit the nut 14. Alternatively, the user can provide a fixing plate 16 with a fixing hole 161. The user first passes the first connecting portion through the fixing hole 161, and then connects the nut 14 to the thread on the first connecting portion, thereby fixing the laser rangefinder 10 onto the fixing plate 16 with the fixing hole 161. The user does not need to use other fixing components to fix the laser rangefinder 10, therefore, the installation of the laser rangefinder 10 is relatively convenient. Furthermore, the nut 14 also includes a plurality of protrusions 141 and a plurality of grooves 142, which are staggered on the outer side wall of the nut 14. The arrangement of the protrusions 141 and grooves 142 can increase the friction of the outer side wall of the nut 14, thereby making it easier for the user to tighten the nut 14. When tightening the nut 14, the arrangement of the protrusions 141 and grooves 142 can prevent the user's hand from slipping.

[0038] Please refer to Figure 3 The fixing member 131 also includes an isolation block 1314, which is disposed between the first limiting part 1312 and the second limiting part 1313, isolating the emitting optical lens 132 and the receiving optical lens 133. Since the emitting optical lens 132 and the receiving optical lens 133 are located on opposite sides of the isolation member, interference between the emitting and receiving optical paths can be avoided. The isolation block 1314 includes a emitting mating part 13141, which is disposed on one side of the isolation block 1314. The emitting mating part 13141 has an arc-shaped structure, and the first limiting part 1312 also has an arc-shaped structure. The emitting mating part 13141 and the first limiting part 1312 are mated to form an annular structure surrounding the emitting optical lens 132. The isolation block 1314 also includes a receiving mating part 13142, which is disposed on the other side of the isolation block 1314 opposite to the emitting mating part 13141. The receiving mating part 13142 has an arc-shaped structure, and the second limiting part 1313 also has an arc-shaped structure. The receiving mating part 13142 and the second limiting part 1313 are mated to form a ring structure surrounding the receiving optical lens 133. Both the transmitting mating part 13141 and the receiving mating part 13142 are non-closed ring structures, which provides more space for the placement of the isolation block 1314, allowing for a larger and stronger isolation block 1314 to be placed within a limited space. Moreover, the connection structure of the transmitting optical lens 132, the receiving optical lens 133, and the isolation block 1314 is also relatively compact.

[0039] Please refer to Figure 3 In this embodiment, the emitting optical lens 132 and the receiving optical lens 133 are made of polymethyl methacrylate (PMMA) with a refractive index of 1.49. PMMA, also known as acrylic or plexiglass, is an important, well-developed, and malleable polymer material with good transparency, chemical stability, and weather resistance. The surfaces of the emitting mating part 13141 and the receiving mating part 13142 are frosted, resulting in poor light transmittance. This improves the accuracy of laser emission from the emitting optical lens 132 and the accuracy of laser reception from the receiving optical lens 133.

[0040] Please refer to Figure 1 The laser rangefinder 10 also includes a seal 15, which is connected to the interior of the housing 11. The seal 15 is located between the opening 1121 and the optical collimating lens structure 13. The portion of the seal 15 corresponding to the opening 1121 is transparent, and the seal 15 isolates the optical collimating lens structure 13 from the external environment. Furthermore, the seal 15 includes a protrusion 151, which is transparent and located on one side of the seal 15. The position of the protrusion 151 corresponds to the position of the opening 1121, and the protrusion 151 is connected to the opening 1121. The protrusion 151 seals the opening 1121, effectively preventing dust or debris from entering the opening 1121.

[0041] Please refer to Figure 4 and Figure 5 The first connecting portion of the outer casing 11 includes a first connecting portion body 111 and a bottom cover 1112, with an insertion hole 11121 provided on the bottom cover 1112. One end of the first connecting portion body 111 is connected to the second connecting portion 112, and the other end of the first connecting portion body 111 is detachably connected to the bottom cover 1112. The bottom cover 1112 can seal the first connecting portion body 111, thereby reducing the entry of dust or debris into the interior of the outer casing 11. A positioning groove 1111 is provided on the first connecting portion body 111, and a positioning block 11122 is connected to the bottom cover 1112. The positioning block 11122 is connected to the positioning groove 1111 and is used to position the bottom cover 1112 in conjunction with the positioning groove 1111. The user can first position the bottom cover 1112 using the positioning block 11122, and then the user can install the bottom cover 1112 and the first connecting part body 111. This makes it more convenient for the user to install the bottom cover 1112. Furthermore, the inner wall of the first connecting part body 111 and the circuit board 12 and the optical collimating lens structure 13 can be sealed by applying adhesive.

[0042] The installation process of this utility model is as follows: When installing the laser rangefinder 10, the user first provides a housing 11 with an opening 1121. The user installs a sealing member 15 inside the housing 11, and connects the protrusion 151 of the sealing member 15 to the opening 1121 of the housing 11. The optical collimating lens structure 13 is provided with a emitting optical lens 132 and a receiving optical lens 133. The emitting optical lens 132 is connected to the first limiting groove 13121 inside the first limiting part 1312, and the receiving optical lens 133 is connected to the second limiting groove 13131 inside the second limiting part 1313. Furthermore, a light-emitting aperture 13122 is provided on one side of the first limiting part 1312, and a light-receiving aperture 13132 is provided on one side of the second limiting part 1313. Subsequently, the user connects the circuit board 12 to the optical collimating lens structure 13, thereby forming an assembly of the optical collimating lens structure 13 and the circuit board 12. The TOF chip 121 of the circuit board 12 is connected to the fixing groove 1311 of the fixing member 131. Next, the user installs the component into the housing 11. Then, the user uses a bolt to pass through the through hole 124 on the circuit board 12 and the screw hole 1131 on the inner wall of the housing 11, and the user threads the bolt into the screw hole 1131. Thus, the user can fix the component to the housing 11. Afterwards, the user connects the wire to the connection terminal 122 of the circuit board 12. The user positions the bottom cover 1112 using the positioning block 11122 and the positioning groove 1111, and then connects the bottom cover 1112 to the first connecting part body 111. Moreover, the wire can pass through the insertion hole 11121 on the bottom cover 1112, so that the wire can be connected to an external device. Then, the user also provides a fixing plate 16 with a fixing hole 161. The user passes the first connecting part body 111 of the housing 11 through the fixing hole 161 on the fixing plate 16. The user then places the nut 14 on the outside of the first connecting part body 111. The user then tightens the nut 14, which is threaded into the first connecting part body 111 of the housing 11, thereby fixing the laser rangefinder 10 to the mounting plate 16. The user has then completed the installation of the laser rangefinder 10.

[0043] This invention provides a compact laser ranging device, comprising a housing, a circuit board, an optical collimating lens structure, and a nut. The circuit board and the optical collimating lens structure are connected inside the housing. The optical collimating lens structure includes a fixing member, a emitting optical lens, and a receiving optical lens. A fixing groove is provided on one side of the fixing member, and a first limiting part and a second limiting part are provided on the other side. A first limiting groove is provided inside the first limiting part, and a second limiting groove is provided inside the second limiting part. The emitting optical lens is connected inside the first limiting groove, the receiving optical lens is connected inside the second limiting groove, and the TOF chip is connected inside the fixing groove. The laser ranging device eliminates the need for a dedicated space to house the TOF chip, emitting optical lens, and receiving optical lens, resulting in a more compact structure. This effectively solves the technical problem of the large size of existing laser ranging devices, and the compact structure of this laser ranging device meets the miniaturization and integration requirements of modern equipment. Furthermore, by connecting the nut to the threads on the housing, the user can fix the laser rangefinder in the desired position. For example, by connecting the nut to the threads on the housing, the user can fix the laser rangefinder to the external mounting plate with mounting holes. Users do not need to use other fixing components to secure the laser rangefinder, making installation quite convenient.

[0044] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A compact laser ranging device, characterized in that, It includes, shell; A circuit board is connected inside the housing and connected to the optical collimating lens structure. A TOF chip is connected to one side of the circuit board, and a connection terminal is connected to the other side of the circuit board. The optical collimating lens structure is connected to the interior of the housing. The optical collimating lens structure includes a fixing member, a emitting optical lens, and a receiving optical lens. A fixing groove is provided on one side of the fixing member, and a first limiting part and a second limiting part are provided on the other side of the fixing member. A first limiting groove is provided inside the first limiting part, and a second limiting groove is provided inside the second limiting part. The emitting optical lens is connected to the interior of the first limiting groove, and the receiving optical lens is connected to the interior of the second limiting groove. A light-transmitting aperture is provided on one side of the first limiting part, and a light-transmitting aperture is provided on one side of the second limiting part. The TOF chip is connected to the interior of the fixing groove. A socket is provided on one side of the housing, and the position of the socket corresponds to the position of the connection terminal. An opening is provided on the other side of the housing, and the position of the opening corresponds to the position of the light transmitting hole and the light receiving hole. The laser ranging device also includes a nut. The outer shell includes a first connecting part and a second connecting part that are connected to each other. The second connecting part is in the shape of a flat disc and its diameter is larger than the inner diameter of the nut. The first connecting part is threadedly connected to the nut, thereby fixing the laser ranging device in the required position.

2. The compact laser ranging device according to claim 1, characterized in that, The opening of the outer shell is racetrack shaped.

3. The compact laser ranging device according to claim 1, characterized in that, The fixing component also includes an isolation block, which is disposed between the first limiting part and the second limiting part, and the emitting optical lens and the receiving optical lens are isolated by the isolation block; The isolation block includes a transmitting mating part, which is disposed on one side of the isolation block. The transmitting mating part has an arc-shaped structure, and the first limiting part also has an arc-shaped structure. The transmitting mating part and the first limiting part are connected to form an annular structure surrounding the transmitting optical lens.

4. The compact laser ranging device according to claim 3, characterized in that, The isolation block includes a receiving mating part, and the transmitting mating part is disposed on the other side of the isolation block relative to the transmitting mating part. The receiving mating part has an arc-shaped structure, and the second limiting part also has an arc-shaped structure. The receiving mating part and the second limiting part are connected to form an annular structure surrounding the receiving optical lens.

5. The compact laser ranging device according to claim 1, characterized in that, The laser ranging device also includes bolts, the circuit board includes lugs connected to both sides of the circuit board, the lugs are provided with through holes, the inner wall of the housing is connected to a connecting post, the middle of the connecting post is provided with a screw hole, the screw hole communicates with the through hole, and the bolt passes through the through hole and is threadedly connected to the screw hole.

6. The compact laser ranging device according to claim 1, characterized in that, The nut also includes a plurality of protrusions and a plurality of grooves, which are staggered on the outer side wall of the nut.

7. The compact laser ranging device according to claim 1, characterized in that, The laser ranging device also includes a sealing element connected to the inside of the housing. The sealing element is located between the opening and the optical collimating lens structure. The position on the sealing element corresponding to the opening is transparent. The sealing element is used to isolate the optical collimating lens structure from the external environment.

8. The compact laser ranging device according to claim 7, characterized in that, The seal also includes a protrusion, which is a transparent structure. The protrusion is disposed on one side of the seal and its position corresponds to the position of the opening. The protrusion is connected to the opening.

9. The compact laser ranging device according to claim 1, characterized in that, The first connecting part includes a first connecting part body and a bottom cover. One end of the first connecting part body is connected to the second connecting part, and the other end of the first connecting part body is detachably connected to the bottom cover. The insertion hole is provided on the bottom cover.

10. The compact laser ranging device according to claim 9, characterized in that, The first connecting part body is provided with a positioning groove, and the bottom cover is connected with a positioning block. The positioning block is connected to the positioning groove, and the positioning block is used to cooperate with the positioning groove to perform positioning operation on the bottom cover.

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