Laser range finder supporting device and laser range finding equipment
By designing a support device and a reflection device for the laser rangefinder, and adjusting the light output direction of the laser rangefinder to be parallel to the surface of the weighing platform, the problem of poor measurement accuracy of the weighing platform dimensions was solved, and high-precision automated measurement was achieved.
Patent Information
- Application Number
- CN202422792262.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-11-15
AI Technical Summary
In existing technologies, measuring the size of a weighing platform requires manual assistance and has poor accuracy, while the direction of light emitted by a laser rangefinder is difficult to adjust, leading to inaccurate measurements.
A laser rangefinder support device was designed, comprising first and second height adjustment components. By adjusting the light output direction of the laser rangefinder to make it parallel to the surface of the weighing platform, and combined with a reflection device, the measurement accuracy is improved.
It achieves the goal of eliminating the need for manual intervention, and the laser rangefinder's beam direction is adjustable, significantly improving the accuracy of weighing platform size measurement.
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Figure CN223597890U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to laser ranging technical field, concretely relates to a laser range finder support device and laser ranging equipment. BACKGROUND
[0002] The size of the scale platform of the weigher such as truck scale and track scale needs to be measured before leaving factory or during on-site installation, and the size of the scale platform is currently measured by using a tape measure, which requires two measurement personnel to cooperate with each other, is very troublesome, and has poor measurement accuracy. In addition, a small number of manufacturers currently use a laser range finder to measure the size of the scale platform, but the light emission direction of the laser range finder is difficult to adjust during use, so that the emitted laser cannot be irradiated onto the reflecting object along a direction parallel to the surface of the scale platform, and the measurement accuracy is also poor.
[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is publicly known. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a laser range finder support device, which is used to solve the problem of poor measurement accuracy of the size of the scale platform.
[0005] In order to achieve the above-mentioned purpose, one embodiment of the utility model provides a laser range finder support device, which comprises a first base, a mounting seat, a first height adjusting member, and a second height adjusting member. The mounting seat is rotationally connected to the first base, and a containing groove for containing the laser range finder is formed in the mounting seat. The first height adjusting member is installed between the first base and the mounting seat, or on the bottom groove wall of the containing groove. The second height adjusting member is installed between the first base and the mounting seat, or on the bottom groove wall of the containing groove. The first height adjusting member and the second height adjusting member are spaced apart in a first direction, and the first direction is the light emission direction of the laser range finder installed in the containing groove.
[0006] In one or more embodiments of the utility model, one side of the containing groove penetrates the side wall of the mounting seat along the first direction.
[0007] In one or more embodiments of the utility model, a first avoiding groove for containing the first height adjusting member is formed in the bottom wall of the containing groove, the first avoiding groove penetrates the side wall of the mounting seat, and at least part of the first operation part of the first height adjusting member protrudes out of the first avoiding groove at the position where the first avoiding groove penetrates the side wall of the mounting seat.
[0008] In one or more embodiments of the utility model, the bottom wall of the mounting base is provided with a second avoiding groove for accommodating the second height adjusting member, the second avoiding groove penetrates the side wall of the mounting base, and at least part of the second operation part of the second height adjusting member protrudes from the second avoiding groove at the side wall penetrating the mounting base.
[0009] In one or more embodiments of the utility model, the laser range finder supporting device further comprises a first rotating shaft connecting the first base and the mounting base, the first rotating shaft is in interference fit with the first base and in interference fit with the mounting base.
[0010] In one or more embodiments of the utility model, the first height adjusting member and the second height adjusting member are arranged on both sides of the first rotating shaft along the first direction.
[0011] In one or more embodiments of the utility model, the periphery of the scale table is provided with a corner, and the first base is provided with a first positioning groove for cooperating with the corner.
[0012] In one or more embodiments of the utility model, the side end of the first positioning groove is provided with two adjacent and intersecting first stop faces, and the intersection line of the two first stop faces coincides with the rotating axis of the mounting base.
[0013] In one or more embodiments of the utility model, the laser range finder supporting device further comprises a first soft magnetic sheet arranged in the first positioning groove.
[0014] The utility model also provides a laser ranging device for measuring the size of the scale table, the periphery of the scale table is provided with at least two corners, the laser ranging device comprises the above laser range finder supporting device, laser range finder and reflecting device. The first base is used for being installed to one of the corners of the scale table, the laser range finder is used for being installed to the accommodating groove, and the reflecting device comprises a second base and a baffle rotatingly connected to the second base. The second base is used for being installed to the other corner of the scale table.
[0015] In one or more embodiments of the utility model, the second base is provided with a second positioning groove for cooperating with the corner.
[0016] In one or more embodiments of the utility model, the side end of the second positioning groove is provided with two adjacent and intersecting second stop faces, and the intersection line of the two second stop faces coincides with the rotating axis of the baffle.
[0017] In one or more embodiments of the utility model, the reflecting device further comprises a second soft magnetic sheet arranged in the second positioning groove.
[0018] In one or more embodiments of the utility model, the reflecting device further comprises a reflective strip arranged on the baffle, and the reflective strip is adapted to be arranged towards the light outlet end of the laser range finder.
[0019] In one or more embodiments of the present application, the baffle includes a main body part and a pivoting part connected integrally, the pivoting part is rotatably connected with the second base through a second rotating shaft, and a rotating axis of the pivoting part is located on a plane where one side wall of the main body part is located.
[0020] Compared with the prior art, the first height adjusting part and the second height adjusting part are adjusted to adjust the angle of the laser ranging instrument emitting laser, so that the laser emitted by the laser ranging instrument can be irradiated to the reflecting object along a direction parallel to the surface of the scale table, and the measurement accuracy of the laser ranging instrument is improved. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0022] Figure 1 It is a perspective view of the laser ranging instrument support device in the first embodiment of the present application under one viewing angle.
[0023] Figure 2 It is an exploded view of the laser ranging instrument support device in the first embodiment of the present application.
[0024] Figure 3 It is a perspective view of the laser ranging instrument support device in the first embodiment of the present application under another viewing angle.
[0025] Figure 4 It is a sectional view of the laser ranging instrument support device in the first embodiment of the present application.
[0026] Figure 5 It is a use state diagram of the laser ranging instrument support device in the first embodiment of the present application.
[0027] Figure 6 It is a perspective view of the laser ranging instrument support device in the second embodiment of the present application.
[0028] Figure 7 It is a sectional view of the laser ranging instrument support device in the third embodiment of the present application.
[0029] Figure 8 It is a use state diagram of the laser ranging equipment in the fourth embodiment of the present application.
[0030] Figure 9It is the stereogram of the reflecting device under one visual angle in the fourth embodiment of the present utility model;
[0031] Figure 10 It is the stereogram of the reflecting device under another visual angle in the fourth embodiment of the present utility model.
[0032] Main figure mark explanation: 100, laser range finder support device, 101, first base, 1011, first positioning groove, 1012, first stop face, 102, mounting seat, 1021, containing groove, 1022, first avoiding groove, 1023, second avoiding groove, 103, first height adjusting piece, 1031, first operation part, 1032, first connecting part, 104, second height adjusting piece, 1041, second operation part, 1042, second connecting part, 105, first rotating shaft, 106, first soft magnetic sheet, 200, reflecting device, 201, second base, 2011, second positioning groove, 2012, second stop face, 202, baffle, 2021, main body part, 2022, pivoting part, 203, light reflection strip, 204, second soft magnetic sheet, 205, second rotating shaft, 300, laser range finder, 400, scale table. DETAILED DESCRIPTION
[0033] In order to make the person skilled in the art better understand the technical scheme in the present utility model, the technical scheme in the embodiments of the present utility model will be described clearly and completely below in combination with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present utility model.
[0034] In the description of the present utility model, it is understood that the terms "top wall", "bottom wall", "top", "bottom", "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply 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 utility model.
[0035] Embodiment one:
[0036] Reference Figures 1 to 5As shown, the embodiment provides a laser range finder supporting device 100, which comprises a first base 101, a mounting seat 102, a first height adjusting member 103 and a second height adjusting member 104. The mounting seat 102 is rotationally connected to the first base 101, and the mounting seat 102 is provided with a containing groove 1021 for containing a laser range finder 300. The first height adjusting member 103 is installed on the bottom groove wall of the containing groove 1021, and the second height adjusting member 104 is installed between the first base 101 and the mounting seat 102, specifically on the side of the mounting seat 102 close to the first base 101.
[0037] The first height adjusting member 103 and the second height adjusting member 104 are arranged in a first direction and are respectively located on both sides of the rotation axis of the mounting seat 102, for adjusting the laser emission angle of the laser range finder 300. The first direction is the light emission direction of the laser range finder 300 installed in the containing groove 1021, and the first direction can be specifically referred to the X-axis direction in Figure 1 and Figure 2 .
[0038] When adjusting the laser emission angle of the laser range finder 300, the first height adjusting member 103 is screwed to move away from the mounting seat 102 (i.e. move upwards), which lifts the laser range finder 300 upwards and increases the height of the end of the laser range finder 300 close to the first height adjusting member 103. Conversely, the first height adjusting member 103 moves towards the mounting seat 102 (i.e. moves downwards), which reduces the height of the end of the laser range finder 300 close to the first height adjusting member 103.
[0039] Similarly, the second height adjusting member 104 is screwed to move away from or close to the mounting seat 102, which can also adjust the height of the end of the laser range finder 300 close to the second height adjusting member 104.
[0040] It should be noted that when the second height adjusting member 104 moves away from the mounting seat 102, due to the limitation of the first base 101, the second height adjusting member 104 is always in contact with the first base 101, and the absolute position of the second height adjusting member 104 is basically unchanged, but the end of the mounting seat 102 close to the second height adjusting member 104 is driven to move upwards (equivalent to the second height adjusting member 104 moves downwards relative to the mounting seat 102). Conversely, the end of the mounting seat 102 close to the second height adjusting member 104 is driven to move downwards.
[0041] Referring to Figure 1 and Figure 2As shown, in order to facilitate the installation of the laser range finder 300 and enable the accommodation groove 1021 to adapt to laser range finders 300 of different lengths, in this embodiment, one side of the accommodation groove 1021 penetrates the side wall of the mounting seat 102 in the first direction. When the length of the laser range finder 300 is too long, the laser range finder 300 can protrude from the mounting seat 102 in the first direction, avoiding the situation that the laser range finder 300 cannot be installed in the accommodation groove 1021.
[0042] Referring to Figure 2 and Figure 4 As shown, in this embodiment, a first avoiding groove 1022 for accommodating the first height adjusting member 103 is formed in the bottom wall of the accommodation groove 1021, and the first avoiding groove 1022 penetrates the side wall of the mounting seat 102. The first height adjusting member 103 comprises a first operating part 1031 and a first connecting part 1032 connected integrally, and the first connecting part 1032 is threadedly connected to the mounting seat 102 via the first avoiding groove 1022.
[0043] In general, the side of the first operating part 1031 away from the first connecting part 1032 is basically flush with the bottom groove wall of the accommodation groove 1021, or is lower than the bottom groove wall of the accommodation groove 1021, so that the bottom wall of the laser range finder 300 can be fitted with the bottom groove wall of the accommodation groove 1021.
[0044] In addition, at the position where the first avoiding groove 1022 penetrates the side wall of the mounting seat 102, the first operating part 1031 protrudes from the first avoiding groove 1022, which can facilitate the operator to turn the first height adjusting member 103 after the laser range finder 300 is installed in the accommodation groove 1021.
[0045] Further, a second avoiding groove 1023 for accommodating the second height adjusting member 104 is formed in the bottom wall of the mounting seat 102, and the second avoiding groove 1023 penetrates the side wall of the mounting seat 102. The second height adjusting member 104 comprises a second operating part 1041 and a second connecting part 1042 connected integrally, the second connecting part 1042 is threadedly connected to the mounting seat 102 via the second avoiding groove 1023, and the second operating part 1041 is at least partially accommodated in the second avoiding groove 1023. At the position where the second avoiding groove 1023 penetrates the side wall of the mounting seat 102, the second operating part 1041 at least partially protrudes from the second avoiding groove 1023.
[0046] Similarly, in general, the side of the second operating part 1041 away from the second connecting part 1042 is basically flush with the bottom wall of the mounting seat 102, or is higher than the bottom wall of the mounting seat 102, so that the bottom wall of the mounting seat 102 can be fitted with the top wall of the first base 101.
[0047] In addition, the first operation part 1031 and the second operation part 1041 are circular in cross-sectional shape, and the first avoiding groove 1022 and the second avoiding groove 1023 are fan-shaped in cross-sectional shape.
[0048] Referring to Figure 4 As shown in the figure, in order to facilitate the connection between the first base 101 and the mounting seat 102, the laser range finder support device 100 in the embodiment further comprises a first rotating shaft 105, the bottom end of the first rotating shaft 105 is inserted into the first base 101 and is in interference fit with the first base 101, and the top end of the first rotating shaft 105 is inserted into the mounting seat 102 and is in interference fit with the mounting seat 102.
[0049] Further, the first height adjusting part 103 and the second height adjusting part 104 are arranged on both sides of the first rotating shaft 105 along the first direction.
[0050] Referring to Figure 1 and Figure 2 As shown in the figure, the cross section of the first base 101 in the embodiment is rectangular, and a first positioning groove 1011 with a rectangular cross section is formed on the bottom wall of the first base 101, two adjacent side ends of the first positioning groove 1011 pass through the corresponding side walls of the first base 101, and the other two adjacent side ends form two first stop surfaces 1012, which abut against the adjacent two side walls of the scale platform 400, so as to facilitate the determination of the installation position of the first base 101 by the operator.
[0051] Further, in order to enable the mounting seat 102 to rotate around the intersection line of the adjacent two side walls of the scale platform 400, the intersection line of the two first stop surfaces 1012 coincides with the rotation axis of the mounting seat 102.
[0052] The laser range finder support device 100 in the embodiment further comprises a first soft magnetic sheet 106 arranged in the first positioning groove 1011, which can be adsorbed on the iron scale platform 400, so as to facilitate the fixation of the position of the first base 101.
[0053] Embodiment two:
[0054] Referring to Figure 6 As shown in the figure, the embodiment provides a laser range finder support device 100, which is different from the first embodiment in that the two side ends of the accommodating groove 1021 in the first direction pass through the side walls of the mounting seat 102, and the first height adjusting part 103 and the second height adjusting part 104 are both mounted in the accommodating groove 1021, specifically on the bottom groove wall of the accommodating groove 1021.
[0055] Further, a stop part can be arranged in the accommodating groove 1021 or at one side end thereof, which is used to fix the position of the laser range finder 300 in the accommodating groove 1021.
[0056] Embodiment three:
[0057] Referring to Figure 7 The embodiment provides a laser range finder support device 100, which is different from the embodiment one in that both sides of the accommodating groove 1021 in the first direction are not penetrated through the side wall of the mounting seat 102, the first height adjusting member 103 and the second height adjusting member 104 are both mounted between the first base 101 and the mounting seat 102, and are specifically mounted on the side of the mounting seat 102 close to the first base 101.
[0058] Embodiment four:
[0059] Referring to Figures 8 to 10 The embodiment provides a laser ranging device, which is used for measuring the size of a scale platform 400, the periphery of the scale platform 400 is provided with at least two corners, and the laser ranging device comprises the laser range finder support device 100, the reflecting device 200 and the laser range finder 300 in any one of the above embodiments. The first base 101 is used for being mounted at one of the corners of the scale platform 400, the laser range finder 300 is used for being mounted into the accommodating groove 1021, and the reflecting device 200 is used for being mounted at the other corner of the scale platform 400. The reflecting device 200 comprises the second base 201 and the baffle 202 rotationally connected to the top wall of the second base 201, the baffle 202 is adapted to be arranged towards the light emitting end of the laser range finder 300, and is used for reflecting the laser emitted by the laser range finder 300 to the laser range finder 300.
[0060] Referring to Figure 9 and Figure 10 In the embodiment, the cross section of the second base 201 is rectangular, the second base 201 is provided with the second positioning groove 2011 with a rectangular cross section on the bottom wall, two adjacent side ends of the second positioning groove 2011 penetrate through the corresponding side walls of the second base 201, and the other two adjacent side ends form two second stop faces 2012. The two second stop faces 2012 are abutted to the two adjacent side walls of the scale platform 400, so that the installation position of the second base 201 is determined by the operator.
[0061] Further, in order to make the baffle 202 rotate around the intersection line of the two adjacent side walls of the scale platform 400 and ensure the measurement accuracy, the intersection line of the two second stop faces 2012 coincides with the rotation axis of the baffle 202.
[0062] The reflecting device 200 in the embodiment further comprises the second soft magnetic sheet 204 arranged in the second positioning groove 2011, the second soft magnetic sheet 204 can be adsorbed on the iron scale platform 400, so as to fix the position of the second base 201.
[0063] Referring to Figure 9As shown, the laser ranging device in the embodiment further comprises a reflective strip 203 arranged on the side wall of the baffle 202, which is adapted to be arranged towards the light emitting end of the laser range finder 300 to improve the reflection effect of the laser.
[0064] Further, the reflective strip 203 is arranged in a substantially vertical direction, and the central axis of the reflective strip 203 in the vertical direction substantially coincides with the rotation axis of the baffle 202.
[0065] With reference to Figure 9 As shown, the baffle 202 in the embodiment comprises a main body part 2021 and a pivoting part 2022 which are integrally connected, the main body part 2021 is of a plate structure, and the pivoting part 2022 is of a block structure, the pivoting part 2022 is rotationally connected with the second base 201 through a second rotating shaft 205, and the main body part 2021 protrudes upwardly from the main body part 2021. The rotation axis of the pivoting part 2022 is located on the plane where one of the side walls of the main body part 2021 is located. Further, the reflective strip 203 is arranged on the side wall of the main body part 2021.
[0066] In actual application, most of the scales 400 are arranged in the structure of a cuboid or similar to a cuboid, and the tester generally needs to measure the length, width and diagonal line of the top surface of the scale 400.
[0067] In the specific measurement, the tester can first install the first base 101 at one corner of the top surface of the scale 400, then place the laser range finder 300 in the accommodating groove 1021 of the mounting seat 102, then install the second base 201 at another corner of the top surface of the scale 400, and then continuously rotate the mounting seat 102 and the baffle 202, and rotate the first height adjusting part 103 and the second height adjusting part 104, so that the laser emitted by the laser range finder 300 is vertically irradiated on the reflective strip 203, and the reading of the laser range finder 300 can obtain the distance between the two corners of the scale 400.
[0068] Then, the installation position of the second base 201 is adjusted, and the above operation is repeated, so as to obtain the length, width and diagonal line of the top surface of the scale 400.
[0069] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be regarded as limiting the claims to which they relate.
[0070] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.
Claims
1. A laser range finder support device (100), characterized in that, The laser range finder supporting device (100) comprises: a first base (101); a mounting seat (102) rotatably connected to the first base (101), wherein the mounting seat (102) is provided with a containing groove (1021) for containing a laser range finder (300); a first height adjusting member (103) installed between the first base (101) and the mounting seat (102) or on a bottom groove wall of the containing groove (1021); a second height adjusting member (104) installed between the first base (101) and the mounting seat (102) or on the bottom groove wall of the containing groove (1021); wherein the first height adjusting member (103) and the second height adjusting member (104) are arranged in a first direction, and the first direction is a light emitting direction of the laser range finder (300) installed in the containing groove (1021).
2. The laser rangefinder support device (100) according to claim 1, characterized in that One side of the containing groove (1021) penetrates a side wall of the mounting seat (102) along the first direction.
3. The laser rangefinder support device (100) according to claim 1, characterized in that The bottom wall of the containing groove (1021) is provided with a first avoiding groove (1022) for containing the first height adjusting member (103), the first avoiding groove (1022) penetrates the side wall of the mounting seat (102), and at least a part of a first operation part (1031) of the first height adjusting member (103) protrudes from the first avoiding groove (1022) at the position where the first avoiding groove (1022) penetrates the side wall of the mounting seat (102); and / or, The bottom wall of the mounting seat (102) is provided with a second avoiding groove (1023) for containing the second height adjusting member (104), the second avoiding groove (1023) penetrates the side wall of the mounting seat (102), and at least a part of a second operation part (1041) of the second height adjusting member (104) protrudes from the second avoiding groove (1023) at the position where the second avoiding groove (1023) penetrates the side wall of the mounting seat (102).
4. The laser rangefinder support device (100) according to claim 1, characterized in that The laser range finder supporting device (100) further comprises a first rotating shaft (105) connecting the first base (101) and the mounting seat (102), the first rotating shaft (105) is in interference fit with the first base (101) and in interference fit with the mounting seat (102).
5. The laser rangefinder support device (100) according to claim 4, characterized in that The first height adjusting member (103) and the second height adjusting member (104) are arranged on two sides of the first rotating shaft (105) along the first direction.
6. The laser rangefinder support device (100) according to claim 1, characterized in that The first base (101) is provided with a first positioning groove (1011) for cooperating with a corner of a periphery of a scale table (400).
7. The laser rangefinder support device (100) according to claim 6, characterized in that The side end of the first positioning groove (1011) is provided with two adjacent and intersecting first stop faces (1012), and the intersection line of the two first stop faces (1012) coincides with the rotating axis of the mounting seat (102); and / or, The laser range finder supporting device (100) further comprises a first soft magnetic sheet (106) arranged in the first positioning groove (1011).
8. A laser distance measuring device for measuring the dimensions of a scale table (400) whose circumference is provided with at least two corners, characterized in that The laser range finder device comprises: The laser range finder support device (100) according to any one of claims 1 to 7, wherein the first base (101) is configured to be mounted to one corner of the scale table (400); and a laser range finder (300) configured to be mounted in the accommodating groove (1021); and a reflecting device (200) comprising a second base (201) and a baffle (202) pivotally connected to the second base (201), wherein the second base (201) is configured to be mounted to another corner of the scale table (400).
9. The laser ranging device of claim 8, wherein, The second base (201) is provided with a second positioning groove (2011) configured to cooperate with the corner.
10. The laser ranging device of claim 9, wherein, The second positioning groove (2011) is provided with two adjacent and intersecting second stop surfaces (2012) at the side ends, and the intersection line of the two second stop surfaces (2012) coincides with the rotation axis of the baffle (202); and / or The reflecting device (200) further comprises a second soft magnetic sheet (204) arranged in the second positioning groove (2011).
11. The laser ranging device of claim 8, wherein, The reflecting device (200) further comprises a light reflection strip (203) arranged on the baffle (202), and the light reflection strip (203) is adapted to be arranged towards the light emitting end of the laser range finder (300); and / or The baffle (202) comprises an integral main body (2021) and a pivot part (2022), the pivot part (2022) is pivotally connected to the second base (201) through a second pivot shaft (205), and the rotation axis of the pivot part (2022) is located on the plane where one side wall of the main body (2021) is located.