Line casting device alarm mechanism and line casting device

Abstract

The utility model discloses a demarcation device alarm mechanism and a demarcation device. The demarcation device alarm mechanism comprises a frame body, a main board, a first conductor, a swinging body and a second conductor. The main board is fixed on the frame body and is used for sending an alarm signal, the first conductor is fixed at the bottom end of the frame body and is electrically connected with the main board, and the first conductor is provided with a vertically arranged through hole. The top end of the swing body is pivotally connected to the top end of the frame body, the swing body is electrically connected with the main board and penetrates through the through hole, and the swing body can swing around the top end. The second conductor is sleeved on the pendulum body. When the frame body is in a vertical state, a gap is formed between the second conductor and the hole wall of the through hole, and when the frame body is in an inclined state larger than the preset angle, the second conductor can make contact with the hole wall of the through hole. According to the demarcation device alarm mechanism and the demarcation device provided by the embodiment of the utility model, the pendulum body can automatically recover to the vertical state through self weight, and the center position of the pendulum body does not need to be calibrated when the demarcation device is assembled and used subsequently, so that the assembly efficiency and the working efficiency of the demarcation device are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of line-casting instruments, and in particular relates to an alarm mechanism for a line-casting instrument and a line-casting instrument. Background Art

[0002] The laser line projector can emit vertical or horizontal visible laser, which is used to mark horizontal laser rays or vertical laser rays on the target surface.

[0003] In the horizontal mode, the existing laser projector generally uses a reflective light sensor and an electronic gyroscope to realize the tilt alarm. This method uses the position offset of the sensor to transmit the signal to the main board. This method requires calibration of the corresponding sensor during the production and manufacturing process to ensure the accuracy and reliability of the alarm. The calibration process increases the production cost. At the same time, the process of converting the alarm electrical signal into an optical signal is processed by the main board, which increases the complexity of the main board signal processing.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide an alarm mechanism for a line-casting instrument, which transmits an electrical signal through the swing of a pendulum body, thereby avoiding frequent calibration of the alarm mechanism for the line-casting instrument.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides an alarm mechanism of a line casting instrument, including a frame, a main board, a first conductor, a pendulum and a second conductor. The main board is fixed to the frame and is used to send out an alarm signal, the first conductor is fixed to the bottom end of the frame and is electrically connected to the main board, and a vertically arranged through hole is provided on the first conductor. The top end of the pendulum is pivotally connected to the top end of the frame, the pendulum is conductive and is electrically connected to the main board, the pendulum passes through the through hole, and the pendulum can swing around its top end. The second conductor is sleeved on the pendulum and is at least partially located in the through hole. Wherein, when the frame is in a vertical state, there is a gap between the second conductor and the hole wall of the through hole, and when the frame is in an inclined state greater than a preset angle, the second conductor can contact the hole wall of the through hole by following the swing of the pendulum.

[0007] In one or more embodiments of the present invention, the second conductor is made of an elastic conductive material.

[0008] In one or more embodiments of the present invention, the line-casting instrument alarm mechanism also includes a plurality of magnets disposed on the top of the first conductor and a pendulum mounted on the pendulum body. The pendulum is located above the first conductor and is made of non-magnetic metal material.

[0009] In one or more embodiments of the present invention, the first conductor is made of a magnetic metal material.

[0010] In one or more embodiments of the present invention, a nickel-plated layer is provided on the surface of the first conductor.

[0011] In one or more embodiments of the present invention, the second conductor is made of conductive silicone.

[0012] In one or more embodiments of the present invention, the frame includes a base and a hanger arranged at the top of the base, the top of the pendulum body is pivotally connected to the top of the hanger, the main board is fixed to the top of the hanger and is located beside the pendulum body, and the first conductor is fixed on the base.

[0013] In one or more embodiments of the present utility model, the alarm mechanism of the line casting instrument also includes an adapter plate and a first wire. The adapter plate is fixed to the side wall at the top of the pendulum body and is electrically connected to the pendulum body. One end of the first wire is electrically connected to the main board, and the other end is electrically connected to the adapter plate.

[0014] In one or more embodiments of the utility model, the alarm mechanism of the line dropping instrument also includes a plurality of mounting parts arranged at the top of the base and surrounding the first conductor, the bottom wall of the edge of the first conductor contacts the top end face of the mounting part, and a threaded hole extending axially to the top of the mounting part is provided inside the mounting part, a bolt is screwed into the threaded hole, and the head of the bolt is pressed against the top of the first conductor.

[0015] In one or more embodiments of the present invention, a mounting groove for accommodating the circumferential edge of the first conductor is provided at the top of the mounting member, and the mounting groove is located beside the threaded hole and on a side of the mounting member close to the first conductor.

[0016] In one or more embodiments of the utility model, the alarm mechanism of the line casting instrument also includes a third conductor and a second wire. The third conductor is arranged at the top end of one of the mounting parts. The head of the bolt on the mounting part is at least partially pressed against the top end of the third conductor, and the bottom end of the third conductor is at least partially pressed against the top end of the first conductor. One end of the second wire is electrically connected to the third conductor, and the other end is electrically connected to the mainboard.

[0017] Another aspect of the present invention provides a line casting instrument, which includes the above-mentioned line casting instrument alarm mechanism.

[0018] Compared with the prior art, the alarm mechanism of the line-casting instrument of the utility model has a pendulum that can automatically restore to a vertical state by its own weight, and there is no need to calibrate the center position of the pendulum during assembly of the line-casting instrument and subsequent use, thereby improving the assembly efficiency and work efficiency of the line-casting instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only some implementations recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a three-dimensional structural diagram of the alarm mechanism of the line casting instrument in one embodiment of the utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the alarm mechanism of the line-casting instrument in one embodiment of the utility model;

[0022] Figure 3 It is a cross-sectional structural diagram of a mounting member, a first conductor and a third conductor in one embodiment of the utility model.

[0023] Explanation of main figure marks: 1. main board, 2. first conductor, 201. perforation, 3. pendulum, 4. second conductor, 5. magnet, 6. pendulum, 7. base, 8. hanger, 81. top plate, 82. support rod, 9. adapter plate, 10. first conductor, 11. mounting piece, 1101. threaded hole, 1102. mounting groove, 12. third conductor, 13. second conductor, 14. bolt. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the implementation of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation of the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementations. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "vertical", "horizontal", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Reference Figures 1 to 3As shown, the alarm mechanism of the line casting instrument in one embodiment of the utility model includes a frame, a main board 1, a first conductor 2, a pendulum 3 and a second conductor 4. The main board 1 is fixed on the frame and used to send an alarm signal. The first conductor 2 is fixed to the bottom end of the frame and is electrically connected to the main board 1. The first conductor 2 is provided with a vertically arranged through hole 201. The top end of the pendulum 3 is pivotally connected to the top end of the frame, and the pivotal connection between the two can be achieved by a movable connection structure such as a universal ball head. The top end of the pendulum 3 is pivotally connected to the top end of the frame, the pendulum 3 is conductive and electrically connected to the main board 1, the pendulum 3 passes through the through hole 201, and the pendulum 3 can swing around its top end. The second conductor 4 is sleeved on the pendulum 3 and is at least partially located in the through hole 201. Among them, when the frame is in a vertical state, there is a gap between the second conductor 4 and the hole wall of the through hole 201, and when the frame is in an inclined state greater than a preset angle, the second conductor 4 swings with the pendulum 3 and can contact the hole wall of the through hole 201.

[0027] According to the above structural design, when the line casting instrument is placed on a plane, since the top end of the pendulum body 3 is pivotally connected to the frame, no matter what placement posture the frame is in, after the pendulum body 3 swings relative to the frame, it will return to a vertical posture or tend to return to a vertical posture under the action of its own weight.

[0028] Based on the above reasons, when the inclination angle of the frame relative to the vertical direction is greater than or equal to the preset angle, the inclination angle of the first conductor 2 fixedly connected to the frame will also be greater than or equal to the preset angle, causing the hole wall of the through hole 201 to contact the second conductor 4 on the pendulum body 3, thereby forming the following circuit: main board 1 → pendulum body 3 → second conductor 4 → hole wall of through hole 201 → first conductor 2 → main board 1.

[0029] The above-mentioned circuit can make the alarm signal circuit on the main board 1 conductive, and the main board 1 sends out an alarm signal and transmits the alarm signal to the alarm unit of the line casting instrument. The alarm unit prompts the operator that the tilt angle of the line casting instrument is too large.

[0030] Those skilled in the art can understand that the above-mentioned preset angle is positively correlated with the distance between the second conductor 4 and the wall of the through hole 201, and is negatively correlated with the distance between the pivot connection part at the top of the pendulum body 3 and the first conductor 2.

[0031] Since the pendulum 3 can maintain a vertical posture under the influence of its own weight, the laser transmitter connected to it emits a horizontal laser perpendicular to the vertical direction. Therefore, when assembling the line-casting instrument and using the line-casting instrument subsequently, there is no need to calibrate the position of the pendulum 3, thereby improving the assembly efficiency and work efficiency of the line-casting instrument.

[0032] In one embodiment, the second conductor 4 is made of an elastic conductive material so that the second conductor 4 itself has a certain elasticity, so that the second conductor 4 can buffer most of the impact force after touching the hole wall of the through hole 201, reduce the impact force on the pendulum 3 and the first conductor 2, form a buffering protection for the pendulum 3 and the first conductor 2, and enhance the stability and service life of the pendulum 3 and the first conductor 2.

[0033] Preferably, the second conductor 4 is made of conductive silicone.

[0034] In one embodiment, reference Figure 1 and Figure 2 As shown, the line-casting instrument alarm mechanism also includes multiple magnets 5 and a pendulum 6.

[0035] Specifically, each magnet 5 is arranged at the top of the first conductor 2 and around the through hole 201 of the first conductor 2. The pendulum 6 is sleeved on the pendulum body 3 and located above the first conductor 2. The pendulum 6 is made of a non-magnetic metal material. Therefore, the pendulum 6 is not magnetic but conductive. When the pendulum 6 swings with the pendulum body 3, the pendulum 6 cuts the magnetic flux lines of the magnet 5, generates an Ampere force opposite to the swing direction, appropriately reduces the swing amplitude of the pendulum body 3, and reduces the time for the pendulum body 3 to return to a vertical posture.

[0036] Preferably, the pendulum 6 is made of pure copper so that the pendulum 6 has better conductivity without being magnetic.

[0037] Preferably, the first conductor 2 is constructed as an annular plate, the through hole 201 is located at the center of the annular plate, and the magnets 5 are distributed in a circle around the through hole 201 .

[0038] Furthermore, in order to facilitate the fixing and installation of the magnet 5 at the top of the first conductor 2, the first conductor 2 is made of a magnetic metal material, so that a magnetic attraction force is generated between the first conductor 2 and the magnet 5, so as to facilitate the fixing of the magnet 5 and improve the installation efficiency of the magnet 5.

[0039] In addition, a nickel-plated layer is provided on the surface of the first conductor 2 , and the nickel-plated layer can improve the electrical connectivity of the first conductor 2 , and can also prevent the first conductor 2 from rusting, thereby increasing the service life of the first conductor 2 .

[0040] Reference Figure 1 and Figure 2 As shown, in order to ensure that the second conductor 4 can stably contact the hole wall of the through hole 201 when the pendulum 3 swings, the second conductor 4 should have a certain length. Preferably, both ends of the second conductor 4 extend from the through hole 201 respectively, and extend upward and downward for a distance respectively, so that no matter what state the pendulum 3 is in, the top end of the second conductor 4 can be kept above the through hole 201 and the bottom end can be kept below the through hole 201.

[0041] In one embodiment, reference Figure 1 and Figure 2 As shown, the frame includes a base 7 and a hanger 8 arranged on the top of the base 7, the top of the pendulum body 3 is pivotally connected to the top of the hanger 8, the main board 1 is fixed to the top of the hanger 8 and is located beside the pendulum body 3, and the first conductor 2 is fixed on the base 7.

[0042] Preferably, the hanger 8 includes a plurality of spaced support rods 82 and a top plate 81 disposed on the top of the support rods 82 , wherein the pendulum body 3 is rotationally connected to the center of the top plate 81 , and the main plate 1 is fixed to the side wall of the top plate 81 .

[0043] Furthermore, in order to facilitate the pendulum body 3 to always maintain electrical connection with the main board 1 during the swinging process, the line casting instrument alarm mechanism also includes an adapter plate 9 and a first wire 10, the adapter plate 9 is fixed on the side wall at the top of the pendulum body 3 and electrically connected to the pendulum body 3, one end of the first wire 10 is electrically connected to the main board 1, and the other end is electrically connected to the adapter plate 9. The first wire 10 has a certain length, so that it is always in a relatively loose state, preventing the first wire 10 from generating tension when the pendulum body 3 rotates relative to the main board 1, and improving the stability of the electrical connection between the pendulum body 3 and the main board 1.

[0044] Preferably, the first conductive wire 10 is an enameled wire with a diameter of 0.4-1 mm, and a plurality of first conductive wires 10 may be provided.

[0045] Reference Figures 1 to 3 As shown, the alarm mechanism of the line casting instrument also includes a plurality of mounting members 11 disposed at the top of the base 7 and surrounding the first conductor 2, and the mounting member 11 is constructed as a columnar structure. The bottom wall of the edge of the first conductor 2 contacts the top end face of the mounting member 11, and the mounting member 11 is provided with a threaded hole 1101 extending axially to the top of the mounting member 11. A bolt 14 is screwed into the threaded hole 1101, and the head of the bolt 14 presses the first conductor 2 from the top, thereby fixing the edge of the first conductor 2 to the top of the mounting member 11, and stabilizing the position of the mounting member 11. When disassembling the first conductor 2, the first conductor 2 can be released from the fixation by only turning the bolt 14.

[0046] Furthermore, in order to facilitate positioning and ensure installation accuracy when installing the first conductor 2, a positioning structure can be provided on the installation member 11. Figure 3 As shown, the top of the mounting member 11 is provided with a mounting groove 1102 for accommodating and positioning the circumferential edge of the first conductor 2, and the mounting groove 1102 is located beside the threaded hole 1101 and on the side of the mounting member 11 close to the first conductor 2. The bottom wall of the mounting groove 1102 is used to support the first conductor 2, and the side wall of the mounting groove 1102 matches the shape of the circumferential edge of the first conductor 2.

[0047] In one embodiment, the alarm mechanism of the line casting instrument also includes a third conductor 12 and a second wire 13. The third conductor 12 is arranged at the top end of one of the mounting parts 11. The top end of the third conductor 12 is at least partially in contact with the head of the bolt 14 on the mounting part 11, and is at least partially pressed by the head of the bolt 14. The bottom end of the third conductor 12 is at least partially in contact with the top end of the first conductor 2 and presses the first conductor 2. One end of the second wire 13 is electrically connected to the third conductor 12, and the other end is electrically connected to the main board 1.

[0048] Preferably, refer to Figure 1 As shown, the thickness of the edge of the first conductor 2 is not less than the vertical depth of the mounting groove 1102 , the third conductor 12 is passed through by the rod of the bolt 14 on the mounting member 11 , and the head of the bolt 14 presses the third conductor 12 from above.

[0049] Furthermore, the thickness of the edge of the first conductor 2 is equal to the vertical depth of the mounting groove 1102 , and the third conductor 12 is a copper plate, and the thickness of the third conductor 12 may be appropriately smaller than the thickness of the first conductor 2 .

[0050] Another embodiment of the utility model further provides a line-casting instrument, which includes the above-mentioned line-casting instrument alarm mechanism and other necessary components of the line-casting instrument.

[0051] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A line-casting instrument alarm mechanism, characterized in that: include: Frame; A main board (1) is fixed on the frame and is used to send out an alarm signal; A first conductor (2) is fixed to the bottom end of the frame and is electrically connected to the main board (1), and a vertically arranged through hole (201) is provided on the first conductor (2); A pendulum (3), the top end of which is pivotally connected to the top end of the frame, the pendulum (3) is conductive and electrically connected to the main board (1), the pendulum (3) passes through the through hole (201), and the pendulum (3) can swing around its top end; as well as A second conductor (4) is sleeved on the pendulum body (3) and at least partially located in the through hole (201); When the frame is in a vertical state, there is a gap between the second conductor (4) and the hole wall of the through hole (201), and when the frame is in an inclined state greater than a preset angle, the second conductor (4) follows the swing of the pendulum (3) and can contact the hole wall of the through hole (201).

2. The line-casting instrument alarm mechanism according to claim 1, characterized in that: The second conductor (4) is made of elastic conductive material.

3. The line-casting instrument alarm mechanism according to claim 1, characterized in that: The line-casting instrument alarm mechanism further comprises a plurality of magnets (5) arranged at the top of the first conductor (2) and a pendulum (6) sleeved on the pendulum body (3); the pendulum (6) is located above the first conductor (2) and is made of a non-magnetic metal material.

4. The line-casting instrument alarm mechanism according to claim 1, characterized in that: The first conductor (2) is made of a magnetic metal material; and / or, The surface of the first conductor (2) is provided with a nickel plating layer; and / or, The second conductor (4) is made of conductive silicone.

5. The line-casting instrument alarm mechanism according to claim 1, characterized in that: The frame comprises a base (7) and a hanger (8) arranged at the top of the base (7); the top of the pendulum (3) is pivotally connected to the top of the hanger (8); the main board (1) is fixed to the top of the hanger (8) and is located beside the pendulum (3); and the first conductor (2) is fixed on the base (7).

6. The line-casting instrument alarm mechanism according to claim 1, characterized in that: The line casting instrument alarm mechanism also includes an adapter plate (9) and a first wire (10); the adapter plate (9) is fixed to the side wall at the top end of the pendulum body (3) and is electrically connected to the pendulum body (3); one end of the first wire (10) is electrically connected to the main board (1), and the other end is electrically connected to the adapter plate (9).

7. The line-casting instrument alarm mechanism according to claim 5, characterized in that: The line-casting instrument alarm mechanism further comprises a plurality of mounting parts (11) arranged at the top of the base (7) and arranged around the first conductor (2); the bottom wall of the edge of the first conductor (2) contacts the top end surface of the mounting part (11); a threaded hole (1101) extending axially to the top of the mounting part (11) is provided inside the mounting part (11); a bolt (14) is screwed into the threaded hole (1101); the head of the bolt (14) is pressed against the top of the first conductor (2).

8. The line-casting instrument alarm mechanism according to claim 7, characterized in that: The top end of the mounting member (11) is provided with a mounting groove (1102) for accommodating the circumferential edge of the first conductor (2); the mounting groove (1102) is located beside the threaded hole (1101) and on a side of the mounting member (11) close to the first conductor (2).

9. The line-casting instrument alarm mechanism according to claim 7, characterized in that: The line casting instrument alarm mechanism further comprises a third conductor (12) and a second wire (13); the third conductor (12) is arranged at the top end of one of the mounting parts (11); the head of a bolt (14) on the mounting part (11) at least partially presses against the top end of the third conductor (12); the bottom end of the third conductor (12) at least partially presses against the top end of the first conductor (2); one end of the second wire (13) is electrically connected to the third conductor (12), and the other end is electrically connected to the main board (1).

10. A line casting instrument, characterized in that: It comprises the line casting instrument alarm mechanism as described in any one of claims 1 to 9.

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