Laser range finder

Abstract

The embodiment of the utility model discloses a laser range finder. The laser range finder comprises a shell, a transmitting assembly and a receiving assembly, wherein the transmitting assembly and the receiving assembly are arranged in the shell; the transmitting assembly comprises a laser tube, a transmitting lens, a transmitting lens support and a first operating rod, the transmitting lens is fixed to the transmitting lens support and located in the light emitting direction of the laser tube so as to condense laser, a first adjusting hole is formed in the shell, and a second adjusting hole is formed in the shell; one end of the first operating rod penetrates through the first adjusting hole to be connected with the transmitting lens support, the other end of the first operating rod is located outside the shell, the first operating rod is moved to drive the transmitting lens support to move in the main optical axis direction of the transmitting lens, and then the distance between the transmitting lens and the laser tube is changed; therefore, the size of the light spot can be adjusted, the size of the light spot can be increased when the target object is far away, a user can find the light spot conveniently, and then the laser is accurately irradiated on the target object.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser ranging technical field especially relates to a laser range finder. BACKGROUND

[0002] The laser range finder is the instrument that utilizes laser to the distance of target carries out accurate determination, the laser range finder emits a very thin laser beam to target, this laser meets target surface and will immediately reflect back, is captured and received this reflected back laser signal by highly sensitive photoelectric element, and simultaneously, the timer built-in records the time from laser emission to be received by photoelectric element, according to the time, the distance between the observer (i.e. the position where the range finder is located) and target is calculated.

[0003] However, when the target object is far away, the laser spot size is also small in the far place, and the user cannot find the spot, so the laser cannot be accurately shot on the target object, which affects the accuracy of the measurement result, and even the ranging work cannot be carried out. UTILITY MODEL CONTENT

[0004] The utility model embodiment provides a laser range finder, can adjust the spot size, when the target object is far away, can increase the spot size, is favorable to the user to find the spot, and then accurately shoots the laser on the target object.

[0005] In order to achieve the above purpose, the utility model embodiment provides a laser range finder, which comprises a shell and a transmitting assembly and a receiving assembly installed in the shell.

[0006] The transmitting assembly comprises a laser tube, a transmitting lens, a transmitting lens support and a first operating rod, the transmitting lens is fixed on the transmitting lens support, and the transmitting lens is located in the light emitting direction of the laser tube to condense light on the laser, a first adjusting hole is formed in the shell, one end of the first operating rod passes through the first adjusting hole and is connected with the transmitting lens support, the other end of the first operating rod is located outside the shell, the first operating rod is moved to drive the transmitting lens support to move along the main optical axis direction of the transmitting lens, and then the distance between the transmitting lens and the laser tube is changed.

[0007] Further, a threaded hole is formed in the transmitting lens support, the first operating rod is a screw, and the first operating rod is threadedly connected with the threaded hole.

[0008] Further, the number of the threaded holes of the transmitting lens support, the first adjusting holes and the first operating rods is two, the two threaded holes are oppositely arranged, the two first adjusting holes and the two threaded holes are one-to-one correspondingly arranged, and one end of each first operating rod corresponds to pass through a first adjusting hole and is connected with a threaded hole.

[0009] Further, the first adjusting hole is a strip hole, and a length direction of the first adjusting hole is the same as a main optical axis direction of the emitting lens.

[0010] Further, the receiving assembly comprises a light receiving element, a receiving lens, a receiving lens holder, and a second operating rod, the receiving lens is fixed on the receiving lens holder, and is used for transmitting the reflected laser to the light receiving element, a second adjusting hole is formed on the shell, one end of the second operating rod is connected with the receiving lens holder through the second adjusting hole, and the other end of the second operating rod is located outside the shell, the distance between the receiving lens and the light receiving element is changed by moving the second operating rod to drive the receiving lens holder to move along the main optical axis direction of the receiving lens.

[0011] Further, a threaded hole is formed on the receiving lens holder, and the second operating rod is a screw, and the second operating rod is threadedly connected with the threaded hole.

[0012] Further, the number of the threaded holes of the receiving lens holder, the second adjusting holes and the second operating rods is two, the two threaded holes are oppositely arranged, the two second adjusting holes are arranged in one-to-one correspondence with the two threaded holes, and one end of each second operating rod is connected with one threaded hole through one second adjusting hole.

[0013] Further, the second adjusting hole is a strip hole, and a length direction of the second adjusting hole is the same as a main optical axis direction of the receiving lens.

[0014] Further, the main optical axis direction of the emitting lens is perpendicular to the main optical axis direction of the receiving lens.

[0015] Further, the emitting assembly further comprises an emitting circuit board, the receiving assembly further comprises a receiving circuit board, the laser tube is arranged on the emitting circuit board, the light receiving element is arranged on the receiving circuit board, the emitting circuit board is movably arranged in the shell along a direction perpendicular to the main optical axis direction of the emitting lens, and the receiving circuit board is movably arranged in the shell along a direction perpendicular to the main optical axis direction of the receiving lens.

[0016] Beneficial effects: the laser range finder of the utility model, including casing and install in the transmitting assembly, receiving assembly of casing, the transmitting assembly includes laser tube, transmitting lens, transmitting lens support and first control lever, transmitting lens is fixed on transmitting lens support, and transmitting lens is located in the light emitting direction of laser tube to concentrate light to laser, the first adjusting hole is set up on the casing, one end of first control lever passes through first adjusting hole and is connected with transmitting lens support, the other end of first control lever is located outside the casing, by moving first control lever to drive transmitting lens support moves along the main optical axis of transmitting lens, and then the distance between transmitting lens and laser tube is changed, so the light spot size can be adjusted, when the target object is far, the light spot size can be adjusted to be big, thereby being favorable to user to find light spot, and then the laser is accurately hit on target object. BRIEF DESCRIPTION OF DRAWINGS

[0017] The technical scheme and beneficial effects of the utility model will be apparent by the following detailed description of the specific embodiment of the utility model in combination with the drawings.

[0018] Figure 1 It is the structure schematic diagram of laser range finder provided by the utility model embodiment;

[0019] Figure 2 It is Figure 1 Another view structure schematic diagram of laser range finder shown in the figure;

[0020] Figure 3 It is Figure 1 The cross section view of laser range finder along AB direction shown in the figure;

[0021] Figure 4 It is Figure 1 The cross section view of laser range finder along EF direction shown in the figure. DETAILED DESCRIPTION

[0022] Please refer to the drawings, wherein the same component symbol represents the same component, the principle of the utility model is exemplified in a suitable operating environment. The following description is based on the illustrated embodiment of the utility model, which should not be regarded as limiting other embodiments of the utility model not detailed herein.

[0023] Referring to Figure 1 And Figure 2 The laser range finder 100 of the utility model embodiment, including casing 10 and install in the transmitting assembly, receiving assembly of casing 10. Wherein casing 10 has laser exit port 101 and laser entrance 102, laser is shot from laser exit port 101, and the laser reflected from target object enters casing 10 from laser entrance 102.

[0024] As shown in Figure 3 The emitting assembly includes a laser tube 21, an emitting lens 22, an emitting lens holder 23 and a first operating rod 24. The emitting lens 22 is fixed on the emitting lens holder 23, and the emitting lens 22 is located in the light emitting direction of the laser tube 21 to condense the laser. A first adjusting hole 103 is formed on the shell 10, one end of the first operating rod 24 passes through the first adjusting hole 103 and is connected with the emitting lens holder 23, and the other end of the first operating rod 24 is located outside the shell 10. By moving the first operating rod 24, the emitting lens holder 23 is driven to move along the main optical axis direction of the emitting lens 22, thereby changing the distance between the emitting lens 22 and the laser tube 21. Thus, by changing the distance between the emitting lens 22 and the laser tube 21, the size of the laser spot can be adjusted. When the target object is far away, the emitting lens 22 can be moved by the first operating rod 24 to increase the size of the light spot, thereby facilitating the user to find the light spot and accurately hitting the laser on the target object. In addition, when the target object is close, the light spot can be reduced to make the laser more concentrated, thereby improving the measurement accuracy.

[0025] Further, the emitting lens holder 23 and the first operating rod 24 can be detachably connected. For example, threaded holes can be formed on the emitting lens holder 23, and the first operating rod 24 is a screw. The first operating rod 24 is threadedly connected with the threaded holes, thereby fixing the first operating rod 24 and the emitting lens holder 23. By moving the first operating rod 24, the emitting lens holder 23 can be driven to move, thereby moving the emitting lens 22.

[0026] Based on the view shown in Figure 2 The main optical axis direction of the emitting lens 22, i.e. the front-rear direction, the first operating rod 24 can move forward or backward within the hole range defined by the first adjusting hole 103, thereby driving the emitting lens 22 to move forward or backward to change the distance between the emitting lens 22 and the laser tube 21, and adjust the size of the laser spot.

[0027] In order to facilitate operation, the number of the threaded holes of the emitting lens holder 23, the first adjusting holes 103 and the first operating rods 24 is two. The two threaded holes are oppositely arranged, the two first adjusting holes 103 are correspondingly arranged with the two threaded holes, and one end of each first operating rod 24 passes through one first adjusting hole 103 and is connected with one threaded hole.

[0028] When the spot size of the emitted laser is not needed to be adjusted, the first control rod 24 can be detached by rotating the knob, and when the spot size of the emitted laser is needed to be adjusted, the first control rod 24 is screwed into the threaded hole of the reflecting lens holder 23 again. Of course, in other embodiments, the emitting lens holder 23 and the first control rod 24 can also be connected in a non-detachable manner, for example, the two can be welded.

[0029] The first adjusting hole 103 can be a strip-shaped hole, and the length direction of the first adjusting hole 103 is the same as the main optical axis direction of the emitting lens 22, that is, the length of the first adjusting hole 103 extends along the front-rear direction, so as to facilitate the movement of the first control rod 24 along the front-rear direction. Of course, in other embodiments, the first adjusting hole 103 can also be a circular hole or other irregularly shaped through hole, as long as it can provide sufficient movement space for the first control rod 24.

[0030] In the embodiment of the utility model, as shown in Figure 4 The receiving assembly includes a light receiving element 31, a receiving lens 32, a receiving lens holder 33, and a second control rod 34. The receiving lens 32 is fixed on the receiving lens holder 33 and is used to transmit the reflected laser to the light receiving element 31. The light receiving element 31 can be an APD (Avalanche Photodiode) or other photoelectric sensors. A second adjusting hole 104 is formed on the shell 10. One end of the second control rod 34 passes through the second adjusting hole 104 and is connected with the receiving lens holder 33. The other end of the second control rod 34 is located outside the shell 10. The second control rod 34 is moved to drive the receiving lens holder 33 to move along the main optical axis direction of the receiving lens 32, so as to change the distance between the receiving lens 32 and the light receiving element 31, thereby changing the spot size of the received laser. During the measurement process, the receiving lens 32 can be moved according to actual needs to adjust the spot size of the received laser.

[0031] Based on the view shown in Figure 2 The main optical axis direction of the receiving lens 32 is the up-down direction. The second control rod 34 can be moved upward or downward within the hole range defined by the second adjusting hole 104, so as to drive the emitting lens 22 to move upward or downward to change the spot size of the received laser.

[0032] In the embodiment of the utility model, the emitting lens 22 can move along two front-rear directions, and the receiving lens 32 can move along two up-down directions, that is, the emitting lens 22 and the receiving lens 32 both have only two degrees of freedom. Compared with the case that the emitting lens 22 and the receiving lens 32 can move along the front-rear, left-right, and up-down directions, the degrees of freedom are less, so as to be more conducive to the stability of the positions of the emitting lens 22 and the receiving lens 32 after being moved, and the positions are not easy to change, thereby improving the stability of the device.

[0033] Further, the receiving lens holder 33 is provided with threaded holes, the second operating rod 34 is a screw, and the second operating rod 34 is threadedly connected with the threaded holes, so that the second operating rod 34 and the receiving lens holder 33 can be fixed, and the receiving lens holder 33 can be moved by moving the second operating rod 34, and then the receiving lens 32 can be moved.

[0034] Optionally, the number of the threaded holes of the receiving lens holder 33, the second adjusting holes 104 and the second operating rods 34 is two, the two threaded holes are oppositely arranged, the two second adjusting holes 104 are arranged in one-to-one correspondence with the two threaded holes, and one end of each second operating rod 34 passes through one second adjusting hole 104 and is connected with one threaded hole.

[0035] The second adjusting hole 104 can be a strip-shaped hole, and the length direction of the second adjusting hole 104 is the same as the main optical axis direction of the receiving lens 32, that is, the length of the second adjusting hole 104 extends in the up-down direction, so as to facilitate the movement of the second operating rod 34 in the up-down direction. Of course, in other embodiments, the second adjusting hole 104 can also be a circular hole or other irregularly-shaped through hole, as long as it can provide sufficient movement space for the second operating rod 34.

[0036] The main optical axis direction of the transmitting lens 22 is perpendicular to the main optical axis direction of the receiving lens 32.

[0037] In the embodiment of the utility model, the transmitting assembly further comprises a transmitting circuit board 25, the receiving assembly further comprises a receiving circuit board 35, the laser tube 21 is arranged on the transmitting circuit board 25, and the light receiving element 31 is arranged on the receiving circuit board 35. The transmitting circuit board 25 is movably installed in the shell 10 along the direction perpendicular to the main optical axis direction of the transmitting lens 22, as shown in the drawings, the direction perpendicular to the main optical axis direction of the transmitting lens 22 (that is, the front-back direction) comprises the up-down direction and the left-right direction, the transmitting circuit board 25 can move along the up-down direction and the left-right direction, wherein the left-right direction refers to the direction perpendicular to the paper, that is, taking the user standing at the rear side of the distance meter 100 as the reference, the left-right direction refers to the left direction and the right direction of the user. Figure 2 The receiving circuit board 35 is movably installed in the shell 10 along the direction perpendicular to the main optical axis direction of the receiving lens 32, as shown in the drawings, the direction perpendicular to the main optical axis direction of the receiving lens 32 (that is, the front-back direction) comprises the up-down direction and the left-right direction, the receiving circuit board 35 can move along the up-down direction and the left-right direction, wherein the left-right direction refers to the direction perpendicular to the paper, that is, taking the user standing at the rear side of the distance meter 100 as the reference, the left-right direction refers to the left direction and the right direction of the user. Figure 2As shown, the main optical axis direction of the vertical receiving lens 32 (i.e. the up-down direction) includes the front-rear direction and the left-right direction, and the receiving circuit board 35 can move along the front-rear direction and the left-right direction, wherein the left-right direction refers to the direction perpendicular to the paper, i.e. with the user standing at the back side of the distance meter 100 as the reference, the left-right direction refers to the left side direction and the right side direction of the user. By moving the transmitting circuit board 25 along the up-down and left-right directions and moving the receiving circuit board 35 along the front-rear and left-right directions, the angle and other parameters of laser transmission and laser reception can be adjusted accordingly.

[0038] The laser distance meter comprises a shell, a transmitting assembly and a receiving assembly installed in the shell, the transmitting assembly comprises a laser tube, a transmitting lens, a transmitting lens support and a first operating rod, the transmitting lens is fixed on the transmitting lens support and is located in the light emitting direction of the laser tube to condense light, a first adjusting hole is formed in the shell, one end of the first operating rod passes through the first adjusting hole and is connected with the transmitting lens support, the other end of the first operating rod is located outside the shell, the first operating rod is moved to drive the transmitting lens support to move along the main optical axis of the transmitting lens, thereby changing the distance between the transmitting lens and the laser tube, and the size of the light spot can be adjusted, the size of the light spot can be increased when the target object is far away, so that the user can find the light spot, and the laser can be accurately shot on the target object.

[0039] The principle and implementation mode of the utility model are described by applying specific examples in the present document, and the above description of the examples is only used to help understand the method and core idea of the utility model; meanwhile, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the utility model.

Claims

1. A laser rangefinder, characterized by The laser module comprises a shell and a transmitting assembly and a receiving assembly installed in the shell. The transmitting assembly comprises a laser tube, a transmitting lens, a transmitting lens holder and a first operating rod, the transmitting lens is fixed on the transmitting lens holder and is located in the light emitting direction of the laser tube to focus the laser, the shell is provided with a first adjusting hole, one end of the first operating rod is connected with the transmitting lens holder through the first adjusting hole, and the other end of the first operating rod is located outside the shell, the distance between the transmitting lens and the laser tube is changed by moving the first operating rod to drive the transmitting lens holder to move along the main optical axis direction of the transmitting lens.

2. The laser rangefinder of claim 1, wherein, The transmitting lens holder is provided with a threaded hole, the first operating rod is a screw, and the first operating rod is threadedly connected with the threaded hole.

3. The laser rangefinder of claim 1, wherein, The number of the threaded holes of the transmitting lens holder, the first adjusting holes and the first operating rods is two, the two threaded holes are oppositely arranged, the two first adjusting holes are arranged in one-to-one correspondence with the two threaded holes, and one end of each first operating rod is connected with one first adjusting hole and one threaded hole.

4. The laser rangefinder of claim 1, wherein, The first adjusting hole is a strip-shaped hole, and the length direction of the first adjusting hole is the same as the main optical axis direction of the transmitting lens.

5. The laser rangefinder of claim 1, wherein, The receiving assembly comprises a light receiving element, a receiving lens, a receiving lens holder and a second operating rod, the receiving lens is fixed on the receiving lens holder and is used for transmitting the reflected laser to the light receiving element, the shell is provided with a second adjusting hole, one end of the second operating rod is connected with the receiving lens holder through the second adjusting hole, and the other end of the second operating rod is located outside the shell, the distance between the receiving lens and the light receiving element is changed by moving the second operating rod to drive the receiving lens holder to move along the main optical axis direction of the receiving lens.

6. The laser rangefinder of claim 5, wherein, The receiving lens holder is provided with a threaded hole, the second operating rod is a screw, and the second operating rod is threadedly connected with the threaded hole.

7. The laser rangefinder of claim 5, wherein, The number of the threaded holes of the receiving lens holder, the second adjusting holes and the second operating rods is two, the two threaded holes are oppositely arranged, the two second adjusting holes are arranged in one-to-one correspondence with the two threaded holes, and one end of each second operating rod is connected with one second adjusting hole and one threaded hole.

8. The laser rangefinder of claim 5, wherein, The second adjusting hole is a strip-shaped hole, and the length direction of the second adjusting hole is the same as the main optical axis direction of the receiving lens.

9. The laser rangefinder of claim 5, wherein, The main optical axis direction of the transmitting lens is perpendicular to the main optical axis direction of the receiving lens.

10. The laser rangefinder of claim 5, wherein, The transmitting assembly further comprises a transmitting circuit board, the receiving assembly further comprises a receiving circuit board, the laser tube is arranged on the transmitting circuit board, the light receiving element is arranged on the receiving circuit board, the transmitting circuit board is movably installed in the shell along the direction perpendicular to the main optical axis direction of the transmitting lens, and the receiving circuit board is movably installed in the shell along the direction perpendicular to the main optical axis direction of the receiving lens.

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