WO1999067595A1

WO1999067595A1 - Laser reference line device capable of leveling automatically

Info

Publication number: WO1999067595A1
Application number: PCT/CN1999/000020
Authority: WO
Inventors: Jianhong Lu; Zhongyi Jin
Original assignee: Jianhong Lu; Zhongyi Jin
Priority date: 1998-06-19
Filing date: 1999-02-23
Publication date: 1999-12-29
Also published as: AU2608199A; CN2336327Y

Abstract

The invention relates to laser device capable of providing level or vertical reference. In the case of the device is provided with a pendulous assembly, a laser emitting assembly, and a damping assembly. The top of the damping assembly is fixed to the top of the case, the bottom of the pendulous assembly is fixed to the top of the support of laser emitting assembly, the bottom of the support is fixed to the pendulum of the damping assembly through an attaching bar. A switch is provided on the case, the source output end of the battery box is electrically joined with the laser driving circuit by the switch. The oil cup of the damping assembly is movable with respect to the base with an extension spring attaching therebetween, the pendulum is placed in the oil cup. The device has simple structure and is capable of leveling automatically.

Description

Automatic leveling laser marking device TECHNICAL FIELD

The present invention relates to a laser device capable of providing a horizontal or vertical reference. Background technique

The existing laser spirit level or spirit level must be adjusted to ensure that the reference surface is level. If you change to the use state, you must readjust the blister. Not only is it inconvenient to use, but also the user must have certain operating skills. The existing laser leveler, although it can automatically level itself, has a complicated structure and is expensive. -Summary of the Invention

The object of the present invention is to provide an automatic leveling laser marking instrument which is convenient to use, simple in structure, and inexpensive.

The technical solution for achieving the purpose of the present invention is that the laser marking device has a housing component, a laser emitting component and a laser driving circuit provided in the housing component; the housing component has a housing, a battery box and an output window, and the battery box and the output window are fixed On the housing; the laser emitting component is composed of a bracket and a linear laser transmitter fixed on the bracket; the emitting head of the linear laser transmitter faces the output window; the power output end of the battery box is electrically connected with the laser driving circuit through a switch, and the laser is driven Circuit of a semiconductor laser diode

D ² is provided in the linear laser transmitter, and the switch is provided on the housing; the structural feature is that it also has a swing joint assembly and a damping device; the damping device has a base, an oil cup, a tension spring assembly and a weight, and the weight is set on In the oil cup, the oil cup and the base are relatively movable and connected with a tension spring assembly; the lower end of the housing is fixedly connected to the upper end of the base, the upper end of the housing is fixedly connected to the upper end of the swing joint assembly, and the lower end of the swing joint group is connected to The upper end of the bracket is fixedly connected, and the lower end of the bracket is fixedly connected with the weight through a connecting rod.

The above damping device also has a sealing ring. The basic shape of the weight is a round table body, the middle is a cylinder, and the lower part is a large rotating body. The sealing ring is sleeved on the upper part of the weight. The oil cup consists of a cup body and a cup lid. The cup cover is matched with the cup body. The cup cover is composed of a circular ring plate located at the side, a circular stage housing with a central hole below the circular ring plate in the middle, and a connecting plate connecting the two into one. The rod passes through the central hole of the round table shell; the cup body consists of the upper part of the cup body with a basic shape on the upper part and the lower part of the cup body with a cylindrical barrel shape and a diameter smaller than the upper part of the cup body; The integral shape is an arc-shaped connecting plate with a circular table housing; the cup body contains damping oil, and the cup The upper part of the body is provided with 3 recessed tension spring grooves; there are 3 sets of tension spring components, and the base is provided with 3 counterbores, each of which is provided with a limit block, and the lower end of the tension spring is embedded in the limit block The upper opening of the tension spring is connected to the connecting screw, and the connecting screw passes through the cup body and the cup cover and is fixed on the oil cup by a nut.

The swing joint assembly is composed of an upper bracket, a lower bracket, a dial block, a pin, a pin sleeve, a bearing and a bearing sleeve; the upper bracket is fixedly connected to the upper end of the housing, the bearing sleeve is fixedly connected to the upper bracket, and the pin sleeve and the dial are The upper part is fixedly connected, the pin is rotationally connected with the pin sleeve through the bearing, the lower part of the dial is fixedly connected with the lower pin sleeve, the lower pin sleeve is fixedly connected with the lower pin shaft, and the lower pin is rotationally connected with the lower bearing sleeve through the lower bearing. The lower bearing sleeve is fixed on the lower bracket, and the lower end of the lower bracket is fixedly connected to the upper end of the bracket as the lower end of the swing joint assembly; the upper conductive plate of the laser driving circuit is fixed on the upper bracket, the switch is fixed on the upper conductive plate, and the laser driving circuit The lower conductive plate is fixed on the lower bracket, and between 2 and 4 conductive springs are connected between the upper conductive plate and the lower conductive plate for transmitting power.

Considering that the laser marking instrument has the function of marking both horizontal and vertical lines and horizontal and vertical lines at the same time, there are two linear laser transmitters mentioned above. It has a semiconductor laser diode D2, an optical base, a lens component and a cylindrical lens base. Both the optical base and the cylindrical lens base have a through cavity. The lens component is fixed in the optical base, and the cylindrical lens is fixed in the cylindrical lens base. The cylindrical lens holder and the optical base are connected with screws, and two spherical marbles for adjustment are arranged between the cylindrical lens holder and the optical base; the semiconductor laser diode D2 is fixed in the optical base, and the two terminal pins of D2 It is electrically connected to the lower conductive plate through the wiring board and wires; one of the two linear laser transmitters is a transmitter that generates a horizontal laser straight line, and the other is a transmitter that generates a vertical laser straight line. The positions of the cylindrical mirrors of the two are mutually Set at 90 degrees; there are 2 switches, their input end is connected to the negative pole of the battery box, there are 3 conductive springs, one of which is the positive lead, and the positive lead is passed through the upper lead The electric board is connected to the positive pole of the battery box, and the other two are used as negative wires. They are connected to the output of a corresponding switch through the upper conductive plate, and the two conductive springs used as the negative wire are emitted to the corresponding linear laser through the lower conductive plate. The cathode of D2 of the device is connected, and the anode of D2 is electrically connected to a conductive spring as a positive wire through a wiring board, a lead wire and a lower conductive plate.

The laser driving circuit also has a protection circuit arranged in the optical base. The protection circuit has a current-limiting resistor diode D1 and a capacitor C1. A resistor R is connected in series in a circuit formed by D2, a switch, and the positive and negative poles of a battery box. R and D2 constitute a main circuit. Branch, C1 is connected in parallel with the main branch, D1 is connected in parallel with the main branch and its anode is grounded.

The above-mentioned housing assembly also has an upper cover; the output window has a flat optical glass, a bracket and a pressure plate, and the light The learning glass consists of screws and pressure plates fixed on the bracket to form the output window; the casing, the box body and the cover of the battery box, the upper cover, the output window bracket and the pressure plate are all made of plastic injection molding; the casing and the battery box The body is injection molded into one body; the upper part of the casing is provided with a connecting rib; the battery box body is provided with a conductive spring as a negative electrode and a conductive electrode as a positive electrode; the battery box body is covered with a cover plate; the upper cover is provided with 2 switch button holes and Three screw holes are screwed on the connecting ribs through the screw holes to make the upper cover fixedly connected to the housing. The button of the switch is provided at the switch button hole of the upper cover.

The above-mentioned housing component and the base of the damping device constitute the overall housing of the laser marking instrument. Its basic shape is a rotating body composed of a smooth curve with a small upper part, a large middle part, and a slightly smaller lower part than the middle part, which are rotated around the central axis.

In order to make the use of the present invention more convenient, the laser marking instrument also has a fixed bracket, the fixed bracket has a base body matching the base, the base body is provided with an internal thread that can be connected to the tripod by a bolt, and the fixed bracket is provided with a hook Hole,

The effects of the present invention are as follows: (1) Before the assembly of the present invention, the linear laser transmitter is adjusted. By controlling the position of the lens holder in the optical holder, D2 is located at the focal point of the lens group, and is connected to the cylindrical lens by adjusting. The screws on the base and the optical base cause the linear laser transmitter to emit a standard linear laser. Because the processing accuracy of the optical base and the supporting bracket is controlled, the axis of the optical base is guaranteed to be the same as the axis of the holder's sleeve. When in the vertical state, the axis of the optical base is in the horizontal state. In this way, the line marker is automatically leveled by the orientation of the gravity of the hammer. If two sets of linear laser transmitters are provided, the line marker not only has the function of providing a horizontal plane reference, but also has the function of providing a vertical plane reference. . When the button switches are pressed separately, the emitted laser light is projected onto the surface of the object, and the red horizontal and vertical lines can be seen separately. If you press two button switches at the same time, you can also see that the horizontal and vertical lines are 90 ° orthogonal red cross lines at the same time. (2) This marking device adopts high The sensitive swing joint, and the thin wire spring structure is used for the connection of the wires, thereby improving the accuracy of the weight orientation, and the accuracy can reach more than 0.1 mm / m. (3) Due to the high sensitivity of the weight swing, it is difficult to stabilize once swinging; even if the weight is in a stable state, when it is shaken, it will start to swing again. For this reason, a unique oil damping device is designed to ensure the red laser The stability of the horizontal line and the vertical line. (4) The cup lid and cup body of the marking device damping device are designed in a specific shape. No matter how the specific shape of the oil cup is tilted or inverted, the damping oil will not flow out. The oil cup slides with the base and is connected with three uniformly distributed spring components. When the bottom of the oil cup is placed downwards, under the action of the marker's own weight, the oil cup moves upward relative to the housing against the resistance of the spring, so that the weight is hammered In a freely drooping position; The cover and the weight are designed to cooperate with each other, and a seal ring is provided between the two. When the bottom of the oil cup is out of contact with the object, the lid of the cup will catch the seal on the weight under the action of the spring force. This not only plays a role in locking the weight, but also seals the oil cup opening to prevent excessive evaporation of the damping oil. (5) This marking instrument can provide accurate horizontal and vertical benchmarks for engineering construction, building decoration, and mechanical installation, saving time and effort, improving work efficiency, and ensuring the quality and progress of engineering construction. Overview of the drawings

FIG. 1 is a schematic structural diagram of the present invention;

2 is a schematic structural diagram of a damping device of the present invention;

3 is a schematic structural diagram of a swing joint assembly according to the present invention;

4 is a schematic structural diagram of a linear laser transmitter of the present invention;

5 is a cross-sectional view taken along A-A of FIG. 4;

FIG. 6 is a schematic circuit diagram of a protection circuit of the present invention;

FIG. 7 is a schematic perspective view of the overall casing of the present invention;

FIG. 8 is a front view of FIG. 7;

FIG. 9 is a rear view of FIG. 7;

FIG. 10 is a left side view of FIG. 7;

Figure 11 is a right side view of Figure 7;

FIG. 12 is a bottom view of FIG. 7;

FIG. 13 is a top view of FIG. 7;

14 is a schematic diagram of a fixing bracket of the present invention;

FIG. 15 is a schematic diagram for determining a horizontal height of a wall panel according to the present invention; FIG.

16 is a schematic diagram for determining a vertical line of a facade partition according to the present invention;

FIG. 17 is a schematic diagram of horizontal lines and vertical lines marked on the wall tiles applied at the same time according to the present invention.

Embodiments of the invention

(Example)

As shown in FIG. 1, the casing assembly 1 is composed of a casing 11, a battery box 12, an output window 13 and an upper cover 14. Case 1 1. The case body 12-1 and cover plate 12-2 of the battery box 12, the upper cover 14, the bracket 13-2 and the pressure plate 13-3 of the output window 13 are made of ABS plastic pellets. The body 11 and the battery case 1 ² _1 are injection-molded into one body. The upper part of the case 11 is provided with a connecting rib 11-1, and the battery case 12-1 is provided with a conductive spring as a negative electrode and a positive electrode. The battery case 12-1 is covered with a cover plate 12-2. The output window 13 is composed of a flat optical glass 13-1, a bracket 13-2, and a pressure plate 13-3. That is, the optical glass 13-1 is fixed to the bracket 13-2 by screws and the pressure plate 13-3 to constitute the output window 13. The upper cover 14 is provided with two switch button holes and three screw holes, and the screws are screwed on the connecting ribs 1 1-1 through the screw holes to fix the upper cover 14 and the housing 11.

As shown in FIG. 2, the base 41, the cup body 42-1, and the cup lid 42-2 of the oil cup 42 are made of plastic as shown in the figure. The cup body 42-1 and the cup cover 42-2 are fixed with three connecting screws 43-4 and nuts, and the periphery is glued with an adhesive. The cup cover 42-2 consists of a circular ring plate 42-2-1 on the side and a circular stage housing 42-2-2 with a central hole below the circular ring plate 42-2 2-1 in the middle, and two The connecting plate 42-2-3 is integrated; the cup body 42-1 is formed by the upper portion of the cup body 42-1-1 whose basic shape is a cylindrical shell, and the basic shape of the lower portion is a cylindrical barrel shape with a diameter smaller than The upper part of the cup body 42-1-1 is composed of the lower part of the cup body 42-1-2 and the arc-shaped connecting plate 41-1-3 whose basic shape is a circular table shell connecting the two together; the inner part of the cup body 42-1 There is damping oil. The upper part of the cup body 42-1-1 is provided with three recessed tension spring grooves. There are three sets of tension spring components 43. The base 41 is provided with three countersinks, one in each countersink. The lower end of the limiting block 43-2, the tension spring 43-1 is embedded in the groove opened at the upper part of the limiting block 43-2, and the upper end of the tension spring 43-1 is connected to the lower end of the connecting screw 43-4, so that the cup The body ⁴ 2_1 is slidably engaged with the base 41. The base 41 is tightly fitted with the housing 11 (see FIG. 1). The weight 44 is provided in the oil cup 42. The basic shape of the weight 44 is a round table body, the middle is a cylinder, and the lower part is a large rotating body. The sealing ring 46 is sleeved on the upper part of the weight 44. A connecting rod 45 is fixedly connected to the upper end of the connecting rod 45, and the connecting rod 45 passes upward through the central hole of the cup cover 42-2 round table housing 42-2-2,

As shown in FIG. 3, the swing joint assembly 3 is composed of an upper bracket 31, a lower bracket 32, a shifting block 33, a pin 34, a pin sleeve 35, a bearing 36, and a bearing sleeve 37; a connecting rib 11 of the upper bracket 31 and the upper end of the housing 11- 1 fixed connection, the bearing sleeve 37 is fixedly connected to the upper bracket 31, the pin sleeve 35 is fixedly connected to the upper part of the block 33, the pin 34 is rotationally connected to the pin sleeve 35 through the bearing 36, and the lower part of the block 33 is connected to the lower pin The sleeve is fixedly connected, the lower pin sleeve is fixedly connected with the lower pin shaft, the lower pin shaft is rotationally connected with the lower bearing sleeve through the lower bearing, and the lower bearing sleeve is fixed on the lower bracket 32. The upper conductive plate 61 of the laser driving circuit 6 is fixed on the upper bracket 31, and two switches 5 are fixed on the upper conductive plate 61. The lower conductive plate 62 of the laser driving circuit 6 is fixed on the lower bracket 32, and the upper conductive plate 61 Connected with the lower conductive plate 62 are three conductive springs 63 that are used to transmit power.

As shown in Figs. 4 and 5, there are two linear laser emitters 22, each of which has a semiconductor laser diode D2, an optical base 22-1, a lens assembly 22-2, and a cylindrical lens base 22-3. The optical mount 22-1 is composed of a lens mount 22-1-1, a lens mount 22-1-2, and a connection mount 22-1-3. The optical mount Each part of 22-1 and the cylindrical lens holder 22-3 have a through cavity. The semiconductor laser diode D2 is fixed in the lens component holder 22-1-1 with an aluminum pressure ring 22-8, and the two terminal pins of D2 are electrically connected to the lower conductive plate 62 through a wiring board and a wire; the lens component 22- 2 Composed of aluminum pressing ring 22-2-3 and pressing lens group 22-2-1 into lens holder 22-2-2, lens holder 22-2-2 is screwed on lens assembly holder 22-1-1 Center and position D2 at the focal point of lens group 22-2-1. The lens component seat cover 22-1-2 is put on the lens component seat 22-1-1, and the front part of the lens component seat cover 22-1-2 is bonded and fixed in the connection seat 22-1-3. The lens group 22-2-1 is coaxial with the optical base 22-1. The cylindrical lens 22-5 is fixed in the cylindrical lens holder 22-3, and the cylindrical lens holder 22-3 and the connecting seat 22-1-3 of the optical base 22-1 are connected with screws 22-6, and the cylindrical lens Between the base 22-3 and the connecting base 22-1-3, two spherical marbles 22-7 are provided for adjustment. The adjustment screw makes the axis of the cylindrical lens 22-5 perpendicular to the axis of the optical base 22-1. By constructing the linear laser transmitter 22, the linear laser transmitter can emit a standard linear laser. As shown in FIG. 1, two linear laser emitters 22 are respectively arranged in the corresponding holders of the holder 21 with the rear ends of the respective lens component seat covers 22-1-2, and the cylindrical mirrors are arranged vertically according to their axes or The horizontal setting can generate a corresponding horizontal laser straight line or a vertical laser straight line. The positions of the cylindrical mirrors of the two linear laser emitters 22 are set at 90 degrees to each other. To form a laser emitting component

2.

As shown in FIG. 6, the input ends of the two switches 5 are connected to the negative electrode of the battery box 12, and one of the three conductive springs 63 is a positive wire, and the positive wire is connected to the positive electrode of the battery box 12 through the upper conductive plate 61. As the negative wires, which are connected to the output of a corresponding switch 5 through an upper conductive plate 61, and the two conductive springs 63 as negative wires are connected to the cathode of D2 of a corresponding linear laser emitter 22 through the lower conductive plate 62 The anode of D2 is electrically connected to the conductive spring 63 as the positive wire through the wiring board 22-4, the lead wire and the lower conductive plate 62. The laser driving circuit 6 also has a protection circuit provided on the wiring board 22-4. The protection circuit has a limit Current resistance ^ diode D1 and capacitor Cl, resistor R is connected in series in the circuit formed by D2, switch 5 and the positive and negative poles of battery box 12, R and D2 form the main branch, C1 is connected in parallel with the main branch, D1 is connected with the main branch The circuits are connected in parallel and their anodes are grounded.

As shown in FIG. 1, the button of the switch 5 is provided at the switch button hole of the upper cover 14, the lower end of the lower bracket 32 is fixedly connected to the upper end of the bracket 21, and the lower end of the bracket 21 is fixedly connected to the connecting rod 45. Thus, the entire laser marking line is formed. Instrument.

See Figures 7 to 13. The housing assembly 1 and the base 41 of the damping device 4 constitute the overall housing of the laser marking instrument. Its basic shape is a smooth curve with a small upper part, a large middle, and a lower part slightly smaller than the middle. And constitute a rotating body.

See Figure 14. In order to use this laser marking instrument within the required height range, this laser marking instrument also has A fixing bracket 7 is provided. The fixing bracket 7 has a base body 71 that is matched with the base 41. The base body 71 is provided with an internal thread that can be connected to a tripod by bolts. The fixing bracket 7 is provided with a hook hole 72. The laser marker is placed in the base 71 of the fixed bracket 7 and can be hung at any height on the wall through the hook hole 72. You can also use M16 bolts to fix the fixing bracket 7 on a tripod and use it at any position on the construction site.

(Application example 1)

FIG. 15 shows a laser marking instrument obtained by an embodiment of the present invention to calibrate a horizontal line of a siding. Place the line marker 8 in the base 71 of the fixed bracket 7, and tighten the bolt on the tripod through the screw hole in the lower part of the base 71. Insert three AA batteries in the battery box 12 and press the button 5 that outputs the laser level to emit a red laser beam from the output window 13. The red laser is projected onto the wall as a horizontal light. As long as the tripod is adjusted to the required height, the wall panel can be installed according to this laser horizontal line.

(Application example 2)

FIG. 16 shows the laser marking instrument obtained by the embodiment of the present invention to determine the vertical line of the vertical partition. The laser marking instrument 8 is placed in the base 71 of the fixing bracket 7 and passes through the hook hole 72 of the fixing bracket 7 , Hang it in the desired position on the wall. Insert three AA batteries in the battery box 12 and press the button switch 5 on the vertical surface of the output laser to emit a red laser beam from the output window 13. The red laser light is projected onto the wall to form a vertical light, and the vertical partition can be installed according to the vertical line of the laser.

(Application Example 3)

FIG. 17 shows the laser marking device obtained by the embodiment of the present invention to mark the horizontal and vertical lines of the wall tile at the same time. The laser marking device 8 is placed in the base 71 of the fixed bracket 7 and passes through the base 71 The lower screw hole is tightened with the bolt on the tripod. Insert three AA batteries in the battery box 12 and press the two button switches 5 at the same time, that is, two red lasers at 90 degrees from each other are emitted from the output window 13, Two red laser beams at 90 degrees to each other are projected on the wall to form a cross line, and the horizontal and vertical lines of the laser can be used to attach the wall tiles.

Claims

Rights request

1. An auto-leveling laser marking instrument, comprising a housing component (1) and a laser emitting component ( ² ) and a laser driving circuit ( ⁶ ) provided in the housing component (1); the housing component (1) has The casing (11), the battery box (12) and the output window (13), the battery box (12) and the output window (13) are fixed on the casing (11); the laser emitting component (2) is supported by the bracket ( ² 1) And the linear laser transmitter (22) fixed on the bracket ( ² 1); the emitting head of the linear laser transmitter (22) faces the output window (13); the power output terminal of the battery box (12) passes the switch (5) It is electrically connected with the laser driving circuit (6). The semiconductor laser diode D2 of the laser driving circuit (6) is provided in the linear laser transmitter (22), and the switch (5) is provided on the casing (11). It has a swing joint assembly (3) and a damping device (4); the damping device (4) has a base (41), an oil cup (42), a tension spring assembly (43), a weight (44), and a weight (44) It is set in the oil cup (42), and the oil cup (42) and the base (41) can move relative to each other and is connected with a tension spring assembly (43); The lower end of the housing (11) is fixedly connected to the upper end of the base (41), the upper end of the housing (11) is fixedly connected to the upper end of the swing joint assembly (3), and the lower end of the swing joint assembly (3) is connected to the bracket (21) The upper end is fixedly connected, and the lower end of the bracket (21) is fixedly connected to the weight (44) through a connecting rod (45).

2. The self-leveling laser marking device according to claim 1, characterized in that the damping device (4) further has a sealing ring (46), and the upper part of the basic shape of the weight (44) is a circular table body and a middle part It is a cylinder, and the lower part is the upper and lower rotating body. The sealing ring (46) is sleeved on the upper part of the weight (44). The oil cup (42) consists of the cup body (42-1) and the cup cover (42-2). Composition, cup lid (42-2) and cup body

(42-1) fit, the cup lid (42-2) is formed by a circular ring plate (42-2-1) on the side, and a central portion located below the circular ring plate (42-2-1) is provided with a center The circular stage housing (42-2-2) with holes and the connecting plate (42-2-3) connecting the two together, the connecting rod (45) passes through the center of the circular stage housing (42-2-2) Hole; cup body (42-1) consists of cup upper part (42-1-1) whose basic shape is a cylindrical shell on the upper part, and the basic shape of the lower part is a cylindrical barrel shape with a diameter smaller than the upper part of the cup body (42-1- 1) The lower part of the cup body (42-1-2) and the arc-shaped connecting plate (41-1-3) whose basic shape is a circular table shell connecting the two together; the cup body (42-1) contains the inner part There is damping oil, and the upper part of the cup body (42-1-1) is provided with 3 recessed tension spring grooves; the tension spring assembly (43) has 3 groups, and the base (41) is provided with 3 counterbores, each There is a limit block (43-2) in the counterbore, and the lower end of the tension spring (43-1) is embedded in the groove opened at the upper part of the limit block (43-2) and is limited by a limit pin (43-3) Positioning, the upper end of the tension spring (43-1) is connected with the connecting screw (43-4), and the connecting screw (43-4) passes through the cup body (42-1) and the cup (42-2), by The nut is fixed on the oil cup (42).

3. The self-leveling laser marking device according to claim 2, characterized in that the swing joint component (3) is composed of an upper bracket (31), a lower bracket (32), a dial block (33), and a pin (34), pin sleeve (35), bearing (36) and bearing sleeve (37); the upper bracket (31) is fixedly connected to the upper end of the housing (11), and the bearing sleeve (37) is fixedly connected to the upper bracket (31) , Pin sleeve (35) and the block

The upper part of (33) is fixedly connected, the pin (34) is rotatably connected to the pin sleeve (35) through the bearing (36), the lower part of the dial (33) is fixedly connected to the lower pin sleeve, and the lower pin sleeve is connected to the lower pin The shaft is fixedly connected, and the lower pin shaft is rotatably connected to the lower bearing sleeve through the lower bearing. The lower bearing sleeve is fixed on the lower bracket (32), and the lower end of the lower bracket (32) is used as the lower end of the swing joint assembly (3) and the bracket (21). The upper end is fixedly connected; the upper conductive plate (61) of the laser driving circuit (6) is fixed on the upper bracket (31), the switch (5) is fixed on the upper conductive plate (61), and the lower conductive plate of the laser driving circuit (6) (62) fixed on the lower bracket (32), and between the upper conductive plate (61) and the lower conductive plate (62) are connected 2-4 conductive springs (63) for transmitting power.

4. The self-leveling laser marking device according to claim 3, characterized in that there are two linear laser transmitters (22), and each of the linear laser transmitters (22) has a semiconductor laser diode D2, Optical mount (22-1), lens assembly (22-2) and cylindrical lens mount (22-3), optical mount

(22-1) and cylindrical lens holder (22-3) both have a through-type inner cavity. The lens assembly (22-2) is fixed in the optical seat (22-1), and the cylindrical lens (22-5) is fixed. In the cylindrical lens holder (22-3), use the screw

(22-6) the cylindrical lens holder (22-3) is connected to the optical base (22-1), and the cylindrical lens holder (22-3) and the optical base (22-1) are provided for adjustment 2 spherical marbles (22-7); the semiconductor laser diode D2 is fixed in the optical base (22-1), and the two terminal pins of D2 are electrically connected to the lower conductive plate (62) through the wiring board and the wires; two One of the linear laser transmitters (22) is a transmitter that generates a horizontal laser straight line, and the other is a transmitter that generates a vertical laser straight line. The positions of the cylindrical mirrors of the two are set at 90 degrees to each other. There are 2 switches (5). Their input terminals are connected to the negative electrode of the battery box (12). There are three conductive springs (63), one of which is a positive wire, and the positive wire passes through the upper conductive plate.

(61) Connected to the positive pole of the battery box (12), and the other two are used as negative wires. They are connected to the output of the corresponding switch (5) through the upper conductive plate (61), and used as the two conductive springs of the negative wire.

(63) The lower conductive plate (62) is connected to the cathode of D2 of a corresponding linear laser transmitter (22), and the anode of D2 is connected to the conductive spring (the positive wire) through the terminal plate, the lead and the lower conductive plate (62). 63) Electrical connection.

5. The laser leveling instrument with automatic leveling according to claim 4, characterized in that: the laser The driving circuit (6) also has a protection circuit provided in the optical base (22-1). The protection circuit has a current limiting resistor ^ a diode D1 and a capacitor Cl, and a resistor R is connected in series with D2, the switch (5) and the battery box (12). In the circuit composed of positive and negative poles, R and D2 form the main branch, and C1 and the main branch are connected in parallel.

D1 is connected in parallel with the main branch and its anode is grounded.

6. The self-leveling laser marking device according to any one of claims 1 to 5, characterized in that the housing component (1) further has an upper cover (14); the output window (13) has a flat optical glass

(13-1), bracket (13-2) and pressure plate (13-3), the optical glass (13-1) is fixed on the bracket (13-2) by screws and pressure plate (13-3) to form the output Window (13); housing (11), box body (12-1) of battery box (12) and cover plate (12-2), top cover (14), and bracket (13-) of output window (13) 2) Both the pressing plate (13-3) are made of plastic injection molding; the casing (11) and the battery case (12-1) are injection-molded into one body; the upper part of the casing (11) is provided with a connecting rib (11-1), The battery case (12-1) is provided with a conductive spring as a negative electrode and a conductive electrode as a positive electrode. The battery case (12-1) is covered with a cover plate (12-2); the upper cover (14) is provided with 2 A switch button hole and 3 screw holes are screwed on the connecting rib (11-1) through the screw holes to make the upper cover (14) and the casing (11) fixedly connected. The button of the switch (5) is provided. At the switch button hole in the upper cover (14).

7. The laser leveling instrument capable of being automatically leveled according to claim 6, characterized in that the housing component (1) and the base ( ⁴¹ ) of the damping device ( ⁴ ) constitute the overall casing of the laser leveling instrument, Its basic shape is a rotating body composed of a smooth curve with a small upper part, a large middle part, and a slightly smaller lower part than the middle part.

8. The self-leveling laser marking device according to claim 7, characterized in that the laser marking device further comprises a fixing bracket (7), and the fixing bracket (7) has a matching base (41). The base body (71), the base body (71) is provided with an internal thread that can be connected to a tripod by a bolt, and a fixing bracket

(7) Hook holes (72) are provided.