Touch alarm device for laser level meter and movement structure

Abstract

The utility model discloses a touch alarm device for a laser level meter and a movement structure, which comprise a swinging body which is arranged in a hanging bracket in a manner of swinging back and forth and left and right through a cross shaft, a conducting ring which is horizontally connected to the side wall of the swinging body through a connecting bracket, and an elastic contact piece which is vertically arranged on the hanging bracket, the end part of the elastic contact piece vertically penetrates through the axis position of the hole of the conducting ring, and when the pendulum body deviates from the vertical center line, the elastic contact piece is in contact with the inner wall of the central hole of the conducting ring to form circuit closing, so that an alarm device in the laser level meter is triggered to send out an alarm signal. According to the utility model, the traditional wire connection is canceled, and the design of combining the pendulum body, the conducting ring and the flexible elastic contact piece is adopted, so that the interference of the weight and bending resistance of the wire on the swinging of the pendulum body is avoided; according to the touch alarm device and the movement structure, the risk of wire fatigue or fracture is reduced, and the leveling speed of a laser level meter can be improved.

Description

Technical Field

[0001] The utility model relates to the field of laser levels, in particular to a touch alarm device and a movement structure for a laser level. Background Art

[0002] As a precision measurement tool, a laser level is widely used in fields such as construction, decoration, and surveying and mapping. One of its core components is a pendulum. The pendulum usually works in a freely suspended manner, similar to the principle of a pendulum. When the level is turned on, the pendulum will automatically adjust to the vertical position under the action of gravity to ensure that the laser beam remains horizontal. However, in actual use, since the plane on which the laser level is placed is not necessarily completely horizontal, vibrations in the construction environment can also cause the pendulum to easily generate excessive vibrations during the swinging process, thereby affecting the quick leveling and measurement accuracy of the level.

[0003] Therefore, an automatic leveling alarm structure is designed inside the laser level to remind the user that the device is deviated from the horizontal position. The existing automatic leveling alarm structure usually installs a laser diode on the pendulum and uses wires to connect the pendulum and the column to supply power to the laser diode. When the pendulum deviates from the vertical center line, the pendulum contacts the external column structure, and the alarm system is triggered by short - circuit through the metal part. In order to reduce the influence of the wires on the sensitivity of the pendulum, small - diameter enameled wires with extremely high flexibility are usually used for connection to ensure that the pendulum is not interfered by excessive resistance during swinging, thereby maintaining the accuracy of the system.

[0004] However, this automatic leveling alarm structure still has some problems. Even though small - diameter enameled wires with extremely high flexibility are used, the presence of the wires may still have a certain impact on the swinging of the pendulum. Under high - precision requirements, the weight and bending resistance of the wires may cause the pendulum to swing less freely, affecting the overall accuracy of the level and the timeliness of the alarm. Secondly, after long - term use, the risk of wire fatigue or fracture will also increase, affecting the reliability of the alarm system. In addition, when the pendulum deviates from the center line and triggers the alarm through physical contact, the pendulum often swings repeatedly due to inertia when returning to the vertical state, and can only rely on its own gravity to gradually reduce the swinging amplitude until it finally stops. This will cause the level to be unable to work properly for a certain period of time, reducing the operation efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a touch alarm device and a movement structure for a laser level that can solve problems existing in the prior art such as insufficient freedom of pendulum swinging, slow recovery speed, wire fatigue or fracture, and can improve the automatic leveling speed and measurement accuracy of the laser level.

[0006] To achieve the above - mentioned purpose, the utility model adopts the following scheme: A touch alarm device for a laser level, comprising:

[0007] A pendulum body, which is installed in a hanger inside the housing of a laser level in a manner that it can swing back and forth, left and right. When the pendulum body is in a vertical state, it does not trigger an alarm.

[0008] A conductive ring, which is horizontally connected to the side wall of the pendulum body through a connecting bracket, and there is a hole in the center of the conductive ring. The conductive ring is electrically connected to the circuit board inside the laser level.

[0009] An elastic contact member made of a flexible conductive material, which is vertically installed on the hanger, and the end of the elastic contact member vertically passes through the axial position of the hole in the conductive ring. A preset gap is maintained between the elastic contact member and the inner wall of the hole in the center of the conductive ring.

[0010] When the pendulum body deviates from the vertical center line, the elastic contact member contacts the inner wall of the central hole of the conductive ring to form a closed circuit, thereby triggering the alarm device inside the laser level to emit an alarm signal.

[0011] In this solution, the pendulum body is connected to the alarm system through a conductive ring, canceling the traditional wire connection method. This design fundamentally solves the influence of the wire weight and bending resistance on the pendulum swing, enabling the pendulum body to swing more freely, reducing the influence of external interference on the system accuracy. At the same time, canceling the wire also reduces the risk of wire fatigue and fracture, improving the long-term reliability of the system. In addition, an elastic contact member is used instead of the traditional hard contact triggering method. The elastic contact member can not only achieve more sensitive triggering, but also reduce the mechanical friction between the pendulum body and the contact member through the elastic characteristics of the flexible material. This design reduces the pendulum swing resistance caused by contact friction, further improving the sensitivity and accuracy of the system. In addition, the flexible design of the elastic contact member enables it to better adapt to deformation and wear during long-term use, extending the service life of the system.

[0012] As a further solution of the present utility model, the elastic contact member is a metal spring. When the conductive ring swings with the pendulum body and the inner wall of the central hole contacts the metal spring, the metal spring generates a bending deformation and triggers an alarm signal. When the metal spring returns to the upright state, it simultaneously pushes the pendulum body to accelerate back to the vertical center position, and the inner wall of the central hole of the conductive ring separates from the elastic contact member to disconnect the circuit and stop the alarm device from alarming. By using a metal spring as the elastic contact member, when the pendulum body deviates from the center line, the metal spring will bend and trigger an alarm signal. This design can not only quickly respond to the deviation situation, but also, after the alarm, use the elastic force of the metal spring to push the pendulum body to accelerate back to the vertical position. Compared with the traditional pendulum relying on gravity to slowly recover, the elastic force of the metal spring can significantly accelerate the return speed of the pendulum body, reducing the repeated swing time of the pendulum body, thereby improving the leveling speed and working efficiency of the level.

[0013] As a further solution of the present utility model, a metal spring is located below the conductive ring, and the pitch of the middle section of the metal spring is greater than the pitch of the section in contact with the conductive ring. The metal spring in this solution adopts a segmented pitch design, where the pitch of the middle section is larger, enabling it to bend better when subjected to the lateral resistance of the conductive ring to achieve a buffering effect. This design can effectively reduce the impact force between the pendulum body and the conductive ring, reduce mechanical wear and energy loss caused by collisions, thereby improving the durability and stability of the system. At the same time, when the part with a smaller pitch contacts the conductive ring, it can ensure a sufficient contact area. This not only improves the reliability of triggering the alarm signal but also guarantees precise electrical connection, further enhancing the sensitivity and response speed of the system.

[0014] As a preferred solution of the present utility model, a connection seat is provided on the side wall of the pendulum body, and the connection bracket is fixed to the connection seat through bolt fasteners. This fastening connection method not only improves the overall stability of the system but also facilitates the disassembly, assembly, and maintenance of components. On the top of the conductive ring, a curled edge extending upward is provided along the inner circumferential wall of the central hole of the conductive ring. By increasing the curled edge, the contact area with the metal spring is larger to ensure a more sensitive trigger signal.

[0015] As a preferred solution of the present utility model, a spring seat is provided on the hanger, the elastic contact member is vertically inserted upward into the spring seat, a strip-shaped groove is provided on the spring seat, and the spring seat is connected to the hanger through an adjusting bolt passing through the strip-shaped groove. The spring seat is connected to the hanger through the strip-shaped groove and the adjusting bolt, enabling the position of the elastic contact member to be precisely adjusted. This design allows users to fine-tune the system according to actual conditions during use, ensuring the best trigger sensitivity and pendulum body recovery effect. This adjustment mechanism increases the flexibility of the system, making it more adaptable to the precision requirements in different scenarios and further improving the overall performance of the laser level.

[0016] The present utility model also provides a movement structure for a laser level. The hanger includes an upper suspension seat and a lower base arranged at intervals up and down, and the upper suspension seat and the lower base are connected by multiple support rods to form a stable support structure. A cross-axis is provided at the top of the pendulum body and is swingably suspended and connected to the upper suspension seat, allowing it to swing back and forth, left and right. This design effectively disperses the weight of the pendulum body, making it more stable during the swinging process, reducing unnecessary swinging, and thus improving the leveling accuracy. On one side of the pendulum body and the corresponding side of the lower base, there is provided the touch alarm device for the laser level as described above, the elastic contact member is arranged on the lower base, and the conductive ring is connected to one side of the pendulum body.

[0017] As a further solution of the present utility model, an elastic buffer is provided between the bottom surface of the lower base and the bottom wall of the inner cavity of the laser level housing for connection and fixation. This further reduces the impact between the pendulum body and the base, avoiding measurement errors caused by vibration. The addition of the elastic buffer enables the movement structure to maintain a stable working state under external impact or vibration interference, improving the anti-interference ability and durability of the laser level.

[0018] As a preferred solution of the present utility model, accommodation grooves are provided at the four corners of the bottom surface of the lower base, and rubber columns are respectively embedded in the accommodation grooves. Ring-shaped sockets corresponding to the rubber columns are provided on the bottom wall of the inner cavity of the laser level housing, and the bottom ends of the rubber columns are inserted into the corresponding ring-shaped sockets. The rubber material can further absorb vibration and impact, reducing the influence of the external environment on the accuracy of the movement and improving the overall measurement stability.

[0019] As a preferred solution of the present utility model, the cross-axis includes a short shaft whose two ends are rotatably connected to the top of the pendulum body, and a long shaft passes through the center of the short shaft. The two ends of the long shaft are respectively rotatably connected to the upper suspension seat. The short shaft is connected to the pendulum body, and the long shaft is connected to the upper suspension seat. With this design, the pendulum body can swing more flexibly in all directions while maintaining high stability. The design of the cross-axis can provide sufficient support and guidance during the swing of the pendulum body, avoiding the uneven swing caused by a single axis, thereby improving the measurement accuracy.

[0020] As a preferred solution of the present utility model, a through hole is provided through the center of the lower base. The bottom end of the pendulum body extends into the through hole and has a gap with the inner wall of the through hole. This design prevents the pendulum body from being obstructed by the lower base during the swing, ensuring that the pendulum body can swing freely and further improving the measurement sensitivity. A pendulum lock is provided on the top surface of the lower base to hold the lower part of the pendulum body and prevent the pendulum body from malfunctioning or making unnecessary swings under external interference or non-working conditions. The pendulum lock consists of two locking arms whose ends are hinged together and a torsion spring that can keep the two locking arms relatively open or closed. The relative opening or closing of the two locking arms is driven by a preset switch on the laser level housing. By controlling the opening and closing of the pendulum lock through the preset switch on the laser level housing, this design can effectively prevent false alarms or damage caused by the swing of the pendulum body during transportation or non-working conditions of the laser level, improving the reliability of the device.

[0021] In summary, the beneficial effects of the present utility model compared with the prior art are as follows: By eliminating traditional wire connections and adopting a design that combines a pendulum body, a conductive ring, and a flexible elastic contact member, the present utility model significantly improves the freedom and sensitivity of the system, avoids interference from the weight and bending resistance of the wires on the swing of the pendulum body, and reduces the risk of wire fatigue or breakage. At the same time, using a metal spring as the elastic contact member can not only quickly respond to the deviation state but also accelerate the return of the pendulum body to the vertical position through the elastic force, reducing the problem of repeated swinging of the pendulum body due to inertia, and improving the leveling speed and operation efficiency. In addition, the segmented spring pitch design of the metal spring provides better buffering and bending performance while ensuring an effective contact area, reducing the friction and impact between the pendulum body and the conductive ring, and improving the accuracy, stability, and long-term reliability of the touch alarm device. Overall, the present utility model not only optimizes the triggering accuracy and response speed of the touch alarm device but also enhances the adaptability and durability of the touch alarm device, significantly improving the comprehensive performance of the laser level. In addition, the movement structure of the laser level is optimized, improving the freedom and stability of the pendulum body, enhancing the seismic resistance and durability of the system, and reducing the influence of external interference on the measurement accuracy. These improvements not only enhance the overall performance of the laser level but also provide guarantees for stability and accuracy in actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 One of the sectional views of the present utility model installed in the housing of a laser level.

[0023] Figure 2 Another sectional view of the present utility model installed in the housing of a laser level.

[0024] Figure 3 For Figure 2 The enlarged view of part A in

[0025] Figure 4 One of the exploded views of the present utility model.

[0026] Figure 5 Another exploded view of the present utility model.

[0027] Figure 6 One of the three-dimensional views of the movement structure.

[0028] Figure 7 For Figure 6 The enlarged view of part B in

[0029] Figure 8 Another three-dimensional view of the movement structure.

[0030] Explanation of the accompanying symbols: 1. pendulum body; 2. elastic contact member; 3. conductive ring; 4. cross axis; 5. hanger; 6. elastic buffer member; 7. pendulum lock; 8. laser level housing; 9. switch; 11. connecting seat; 31. connecting bracket; 32. curling edge; 41. short axis; 42. long axis; 50. spring seat; 51. upper hanging seat; 52. lower base; 53. support rod; 54. through hole; 61. accommodating groove; 62. rubber column; 63. ring socket; 71. locking arm; 72. toggle block; 73. guide groove; 74. synchronization rod; 501. strip groove; 502. adjusting bolt. DETAILED DESCRIPTION

[0031] The following detailed description provides various embodiments or examples for implementing the present invention. These are, of course, merely examples and are not intended to be limiting. Furthermore, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. Such repetition is for simplicity and clarity in describing the present invention and does not imply a specific relationship between the various embodiments and / or configurations discussed.

[0032] In addition, spatially related terms may be used, such as "below," "lower side," "from the inside out," "above," "upper side," and similar terms. These terms are used to facilitate the description of the relationship between one element or feature and another element or feature in the drawings. These spatially related terms include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be turned to different orientations, rotated 90 degrees or other orientations, and the spatially related adjectives used therein may also be interpreted in the same way. Therefore, they cannot be understood as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Figures 1 to 8A touch alarm device for a laser level, as shown in the figure, includes a pendulum body 1, a conductive ring 3, and an elastic contact 2 made of a flexible conductive material, which is installed on a hanger 5 in a manner that can swing back and forth and left and right. Specifically: A connecting seat 11 is provided on the side wall of the pendulum body 1. One side of the conductive ring 3 is provided with a connecting bracket 31. The connecting bracket 31 is fixed to the connecting seat 11 through a bolt fastener, and then the conductive ring 3 is horizontally connected to the side wall of the pendulum body 1 and electrically connected to the circuit board of the laser level. A spring seat 50 is provided on the hanger 5 below the conductive ring 3. A strip-shaped groove 501 is provided on the spring seat 50. The spring seat 50 is connected to the hanger 5 through an adjusting bolt 502 passing through the strip-shaped groove 501. The elastic contact 2 is vertically inserted into the spring seat 50. The elastic contact 2 vertically passes through the central hole of the conductive ring 3 and maintains a preset gap with the inner wall of the hole in the center of the conductive ring 3. It should be noted that in this embodiment, the elastic contact 2 is exemplified by a metal spring. A curled edge 32 that surrounds the central hole of the conductive ring 3 and extends upward is provided on the top of the conductive ring 3. When the conductive ring 3 swings with the pendulum body 1 and the inner wall of the central hole contacts the metal spring, the metal spring and the conductive ring 3 form a closed circuit, triggering the alarm device to emit an alarm signal, and at the same time, the metal spring deforms and bends. Among them, the spring pitch of the middle section of the metal spring is larger, which can better bend and buffer when the pendulum body 1 deviates, reducing the lateral resistance from the conductive ring 3, while the spring pitch in contact with the conductive ring 3 is smaller to ensure an effective contact area. Coupled with the curled edge 32 that extends upward and is coaxial and has the same inner diameter as the conductive ring 3 at the top of the conductive ring 3, it can better ensure the effective contact area with the metal spring, and the touch generates an alarm signal more sensitively. When the pendulum body returns to the vertical state, the elastic force when the metal spring returns to the upright state can simultaneously push the pendulum body 1 to accelerate back to the vertical center position, reducing the swing time and improving the leveling efficiency. At this time, the inner wall of the central hole of the conductive ring 3 separates from the elastic contact 2 to disconnect the circuit and stop the alarm device from alarming.

[0034] In addition, as Figures 1 to 8 shown is a movement structure of a laser level with the above-mentioned touch alarm device for a laser level. The hanger 5 is installed in the laser level housing 8. The hanger 5 is formed by connecting an upper hanger seat 51 and a lower base 52 that are spaced apart up and down through multiple support rods 53. The pendulum body 1 is suspended on the upper hanger seat 51 through a cross-axis 4 at the top. A through hole 54 penetrates through the center of the lower base 52. The bottom end of the pendulum body 1 extends into the through hole 54 and maintains a gap with the inner wall support of the through hole 54. The cross-axis 4 is composed of a short shaft 41 whose two ends are rotatably connected to the top of the pendulum body 1 and a long shaft 42 that passes through the center of the short shaft 41. The two ends of the long shaft 42 are rotatably connected to the upper hanger seat 51 to ensure the flexible swing of the pendulum body 1 in multiple directions. The spring seat 50 is adjustably installed on the lower base 52 on the side of the pendulum body 1. A laser module is installed on the pendulum body 1.

[0035] In addition, the lower base 52 is connected and fixed to the bottom wall of the inner cavity of the laser level housing 8 via an elastic buffer 6. The four corners of the bottom surface of the lower base 52 are provided with a receiving groove 61, in which a rubber column 62 is embedded. The bottom end of the rubber column 62 is inserted into a pre-set annular socket 63 on the bottom wall of the inner cavity of the laser level housing 8. This structural design can effectively absorb vibration and impact, and prevent external interference from affecting the stability of the pendulum. In order to prevent the pendulum from malfunctioning or swinging unnecessarily when not in operation, a pendulum lock 7 that can hold the lower part of the pendulum 1 is provided on the top surface of the lower base 52. The pendulum lock 7 consists of a locking arm 71 with two hinged ends and a torsion spring. The locking arm is driven by a switch 9 on the laser level housing 8, so that the pendulum is effectively locked in the event of external interference or in the non-operating state, further improving the reliability of the equipment. Specifically, two locking arms 71 are pivotally fixed to a side frame of the lower base 52 via independent hinge axes. The ends of the two locking arms 71, located near their respective hinge axes, overlap one another, while the ends of the two locking arms 71, located away from their respective hinge axes, respectively, clamp onto the outer wall of the lower portion of the pendulum body 1. One locking arm 71 is provided with a guide slot 73, and the other locking arm 71 is provided with a synchronization rod 74 that fits within the guide slot. Each locking arm 71 is provided with a toggle block 72 that engages with the switch 9 on the laser level housing 8. When the switch 9 on the laser level housing 8 is moved, the side of the switch 9 that extends into the housing compresses the toggle block 72, thereby driving the locking arm 71 to rotate outward along its respective hinge axis. The other locking arm 71 then rotates outward synchronously via the synchronization rod. This releases the pendulum body 1, allowing it to swing forward, backward, left, and right along its major axis 42 and minor axis 41. It should be noted that the above-mentioned swing lock 7 is used in commercially available laser levels, so the specific structure can be implemented with reference to the existing technology.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A touch alarm device for a laser level, characterized in that, It includes: A pendulum body (1), which is installed in a hanger (5) inside the housing of the laser level in a manner that allows it to swing back and forth, left and right. When the pendulum body (1) is in a vertical state, it does not trigger an alarm. A slip ring (3), which is horizontally connected to the side wall of the pendulum body (1) through a connecting bracket (31). The slip ring (3) has a hole in the center, and the slip ring (3) is electrically connected to the circuit board inside the laser level. An elastic contact member (2) made of a flexible conductive material, which is vertically installed on the hanger (5). The end of the elastic contact member (2) vertically passes through the axial center position of the hole of the slip ring (3), and a preset gap is maintained between the inner wall of the hole in the center of the elastic contact member (2) and the slip ring (3).

2. The touch alarm device for a laser level according to claim 1, wherein The elastic contact member (2) is a metal spring.

3. The touch alarm device for a laser level according to claim 2, characterized in that, The pitch of the metal spring located below the slip ring (3) in the middle section is greater than the pitch of the section in contact with the slip ring (3).

4. The touch alarm device for a laser level according to claim 2, characterized in that, A connecting seat (11) is provided on the side wall of the pendulum body (1). The connecting bracket (31) is fixed to the connecting seat (11) through bolt fasteners. On the top of the slip ring (3), a curled edge (32) extending upward is provided along the circumferential inner wall of the central hole of the slip ring (3).

5. The touch alarm device for a laser level according to claim 4, wherein, A spring seat (50) is provided on the hanger (5). The elastic contact member (2) is vertically inserted into the spring seat (50). A strip-shaped groove (501) is provided on the spring seat (50). The spring seat (50) is connected to the hanger (5) through an adjusting bolt (502) passing through the strip-shaped groove (501).

6. A movement structure for a laser level, characterized in that, The hanger (5) includes an upper hanger seat (51) and a lower base (52) arranged at intervals up and down. The upper hanger seat (51) and the lower base (52) are connected by a plurality of support rods (53). A cross-axis (4) is provided at the top of the pendulum body (1) and is swingably suspended and connected to the upper hanger seat (51). A touch alarm device for the laser level as described in any one of claims 1 to 5 is provided on one side of the pendulum body (1) and the corresponding lower base (52). The elastic contact member (2) is arranged on the lower base (52), and the slip ring (3) is connected to one side of the pendulum body (1).

7. The movement structure for a laser level according to claim 6, characterized in that, An elastic buffer member (6) is provided between the bottom surface of the lower base (52) and the bottom wall of the inner cavity of the laser level housing for connection and fixation.

8. The movement structure for a laser level according to claim 7, characterized in that, Receiving grooves (61) are provided at the four corners of the bottom surface of the lower base (52). Rubber columns (62) are respectively embedded in the receiving grooves (61). Annular sockets (63) corresponding to the rubber columns (62) are provided on the bottom wall of the inner cavity of the laser level housing. The bottom ends of the rubber columns (62) are inserted into the corresponding annular sockets (63).

9. The movement structure for a laser level according to claim 6, wherein, The cross-axis (4) includes a short shaft (41) whose two ends are rotatably connected to the top of the pendulum body (1). A long shaft (42) passes through the center of the short shaft (41), and the two ends of the long shaft (42) are respectively rotatably connected to the upper hanger seat (51).

10. The movement structure for a laser level according to claim 6, characterized in that, A through hole (54) penetrates through the center of the lower base (52). The bottom end of the pendulum body (1) extends into the through hole (54) and has a gap with the inner wall support of the through hole (54). A pendulum lock (7) is provided on the top surface of the lower base (52) to tightly hold the lower part of the pendulum body (1) and prevent the pendulum body (1) from generating false actions or unnecessary swings under external interference or non-working conditions. The pendulum lock (7) consists of two locking arms (71) whose ends are hinged together and a torsion spring that can keep the two locking arms (71) relatively open or closed. The relative opening or closing of the two locking arms (71) is driven by a switch preset on the housing of the laser level.

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