Lens optical device

Abstract

The utility model discloses a lens optical device, which comprises a lens group, a lens module and a support frame, the lens group is fixed on the support frame, the lens group comprises a first lens and a second lens, the first lens and the second lens are placed in an inverted V shape, the lens group is provided with a spacing part and an approaching part, and the spacing part is fixed on the lens module. The spacing part is closer to the lens module than the approaching part, the first inclined surface of the first lens is attached to the bottom end of the second inclined surface of the second lens, and the top ends of the first inclined surface and the second inclined surface are flush with the upper table surface of the support frame; comprising a laser emitter used in cooperation with the lens module, laser emitted by the laser emitter is refracted by an object and then transmitted into the lens module through a lens group, the area range where the lens module cannot recognize clearly due to interference of a gap included angle of the contact portion of two lenses is greatly reduced, and the lens module has the advantages of being low in cost, small in occupied space, more accurate in recognition and the like.

Description

Technical Field

[0001] The utility model relates to the field of lenses, in particular to a lens optical device. Background Art

[0002] With the continuous development of image processing and machine vision technology, the performance of the robot vacuum cleaner lens module is also constantly improving. Now, some high-end robot vacuum cleaners are equipped with laser radar, which includes a laser transmitter, a lens group and a lens module. The laser transmitter emits laser light, which is refracted back by an object. The refracted laser light is then transmitted to the lens module by the lens group. The laser radar can capture more comprehensive information about the surrounding environment, providing a more accurate basis for the robot's navigation and obstacle avoidance.

[0003] The existing laser radar lens group is mainly divided into single lens and double lens. In the double lens, the lenses are arranged in a positive V-shaped structure (such as Fig.10 shown).

[0004] Since the two lenses are placed sideways, a gap angle is inevitable at the contact point of the lenses. Due to the inconsistent thickness of the lenses at the angle, the direct and refracted angles of the returning laser are unstable when passing through the angle, which ultimately interferes with the calculation of the lens module, causing the sweeping robot to incorrectly identify objects in the interference area, posing a great hidden danger to the safe movement of the sweeping robot.

[0005] As competition in the sweeping robot market becomes increasingly fierce, how to reduce the interference angle of the dual-lens lens group at a low cost has become an urgent problem that people in this field need to solve.

[0006] In addition to the field of sweeping robots, the utility model also has a wide application base in other fields including vehicle-mounted radar, laser detection, etc. Utility Model Content

[0007] The purpose of the utility model is to provide a lens optical device to solve the problems raised in the above background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] Provided is a lens optical device, comprising a lens group, a lens module and a support frame, wherein the lens group is fixed on the support frame, the lens group comprises a first lens and a second lens, the first lens and the second lens are arranged in an inverted V shape, the lens group is provided with a spacer and a close portion, the spacer is closer to the lens module than the close portion, a first inclined surface of the first lens is in contact with a bottom end of a second inclined surface of the second lens, and the top ends of the first inclined surface and the second inclined surface are flush with an upper surface of the support frame;

[0010] It includes a laser transmitter for use with the object. The laser emitted by the laser transmitter is refracted by the object and then transmitted into the lens module through the lens group.

[0011] Furthermore, the first lens and the second lens are both rectangular parallelepiped structures.

[0012] Furthermore, the support frame is provided with a concave portion, and the concave portion is consistent with the lens group spacing portion.

[0013] Furthermore, the first inclined surface and the second inclined surface are V-shaped, and the first inclined surface and the second inclined surface are two side surfaces of the V-shape respectively.

[0014] Furthermore, it comprises a main frame, the main frame is provided with a first cavity, and the lens module is arranged in the first cavity.

[0015] Furthermore, the lens module is provided with an optical channel, which corresponds to the opening of the first cavity, and the optical channel is within the direct and refracted light area of ​​the lens group.

[0016] Furthermore, it comprises a mirror cover, which is connected to the upper end of the main frame and accommodates the lens group. The mirror cover is made of transparent material, and the reflected laser is transmitted into the lens group through the mirror cover.

[0017] Furthermore, the distance between the first lens and the second lens of the lens group spacing part is consistent with the diameter of the upper opening of the first cavity, and the bottom of the first lens and the bottom of the second lens are respectively fixed on both sides of the upper opening of the first cavity.

[0018] Furthermore, the upper end surface of the main frame is provided with support bars, and the support bars are respectively fixed in the gaps between the bottom of the first lens and the bottom of the second lens and the upper end surface of the main frame and are consistent with them.

[0019] Furthermore, the mirror cover is provided with an insertion rod, and the main frame is provided with a corresponding insertion hole. The mirror cover is connected to the main frame by inserting the insertion rod into the insertion hole, and the inner upper wall is in conflict with the upper surface of the support frame.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model changes the placement angle of the first lens and the second lens of the lens group to form an inverted V shape with the first lens and the second lens, and does not need to change the distance between the lens group and the lens module. Under the condition that the receiving and output laser ranges of the lens group are not reduced, the area in which the lens module cannot be clearly identified due to the interference of the gap angle between the contact parts of the two lenses is greatly reduced. The top ends of the first inclined surface and the second inclined surface are flush with the upper table of the support frame, the bottom ends of the first lens and the second lens are respectively fixed on both sides of the first cavity, and the spacing distance between the first lens and the second lens is consistent with the diameter of the first cavity. The utility model has the characteristics of low cost, small space occupation, more accurate identification, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an overall effect diagram of the optical device structure of the lens of the utility model;

[0023] Figure 2 This is a cross-sectional view of the optical device of the lens of the utility model;

[0024] Figure 3 for Figure 2 Enlarged view at P in the middle;

[0025] Figure 4 This is the overall structure diagram of the lens optical device of the utility model;

[0026] Figure 5 This is a structural diagram of a lens cover of the optical device of the utility model;

[0027] Figure 6 This is a diagram showing the internal structure of the lens optical device of the utility model;

[0028] Figure 7 This is a front view of the interior of the lens optical device of the utility model;

[0029] Figure 8 It is a schematic diagram of the structure of a single lens assembly and a first cavity of the utility model;

[0030] Fig. 9 This is a schematic diagram of the interference angle of the lens optical device of the utility model;

[0031] Fig.10 A schematic diagram of interference angles in the prior art;

[0032] Fig.11 The structure diagram of the lens group of the optical device of the lens of the utility model;

[0033] The components in the accompanying drawings are marked as follows: 11 lens group; 111 first lens; 1111 first inclined surface; 112 second lens; 1121 second inclined surface; 113 comparison lens 1; 114 comparison lens 2; 115 spacing portion; 116 close portion; 12 support bar; 13 support frame; 131 upper table; 132 lower recess; 14 insertion hole; 15 main frame; 16 base; 161 support column; 162 support seat; 17 mirror cover member; 171 mirror cover body; 172 insertion rod; 18 first cavity; 1 9 The outer edge of the cavity; 21 The first laser; 22 The second laser; 23 The third laser; 3 The lens module; 31 The optical channel; 32 The outer edge of the channel; P The connection between the lens group and the first cavity; X1 The parallel line along the upper end surface of the support frame; X2 The vertical distance from the lens module of the utility model to the lens group; X3 The vertical distance from the lens module of the prior art to the lens group; Y1 The contact line between the first lens and the support frame; Y2 The contact line between the second lens and the support frame; β1 The interference angle of the utility model; β2 The interference angle of the prior art. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] See also Figures 1 to 3 The utility model provides a lens optical device, including a lens group 11, a lens module 3 and a support frame 13, wherein the lens group 11 is fixed on the support frame 13, the lens group 11 includes a first lens 111 and a second lens 112, the first lens 111 and the second lens 112 are both rectangular parallelepiped structures, the first lens 111 and the second lens 112 are placed in an inverted V shape, the lens group 11 is provided with a spacer 115 and a close portion 116, the spacer 115 is closer to the lens module 3 than the close portion 116, the first inclined surface 1111 of the first lens 111 and the bottom end of the second inclined surface 1121 of the second lens 112 are in contact with each other; including a laser emitter for use with the lens, preferably, the laser emitter includes a first laser 21, a second laser 22 and a third laser 23, the first laser 21, the second laser 22 and the third laser 23 are respectively located above the lens module 3 and emit lasers in three different directions, the laser emitted by the laser emitter is refracted by an object and then transmitted into the lens module 3 through the lens group 11.

[0036] For details, please refer to Figure 7, let the parallel line along the upper end surface of the support frame 13 be X1, the top of the first inclined surface 1111 and the second inclined surface 1121 are flush with the upper table 131 of the support frame 13 relative to X1, the inner upper wall of the mirror cover 17 is a smooth plane, when the mirror cover 17 is connected to the main frame 15, the mirror cover body 171 completely wraps the support frame 13 and the lens group 11, the inner upper wall of the mirror cover 17 is in conflict with the top of the first inclined surface 1111, the second inclined surface 1121 and the upper table 131 of the support frame 13, the mirror cover 17 is made of transparent material, the reflected laser is transmitted to the lens group 11 through the mirror cover 17, by arranging the upper table 131 of the mirror cover 17 and the support of the mirror cover 17, the lens group 11 is protected from being oppressed by the mirror cover 17, and at the same time, it is ensured that the reflected laser entering the mirror cover 17 effectively enters the lens group 11.

[0037] For details, please refer to Fig.11 , the first bevel 1111 and the second bevel 1121 are V-shaped, the first bevel 1111 and the second bevel 1121 are the two side surfaces of the V-shape respectively, the reflected laser is directly incident into the lens module 3 through the first bevel 1111 and the second bevel 1121, due to the inconsistent thickness of the lens, the lens module 3 has an error in recognition, and the laser area transmitted from the first bevel 1111 and the second bevel 1121 into the lens module 3 is set as the interference area;

[0038] See also Fig.10 In the prior art, since the comparison lens 1 113 and the comparison lens 2 114 are arranged in a positive V shape, when the vertical distance between the lens module 3 and the lens group 11 is X3, the angle range of the interference zone is β2;

[0039] See also Fig. 9 In the utility model, the first lens 111 and the second lens 112 are arranged in an inverted V shape, and the vertical distance between the lens module 3 and the lens group 11 is set to X2, and the angle range of the interference zone is β1; when X2 is equal to X3, β1 is significantly smaller than β2. Since the range of the interference zone becomes smaller, the recognition accuracy of the sweeping robot is greatly improved, and the safety of the sweeping robot during operation is ensured.

[0040] See also Figure 6 , comprising a main frame 15, the main frame 15 is provided with a first cavity 18, the lens module 3 is provided in the first cavity 18, the upper end surface of the main frame 15 is provided with a support bar 12, the support bar 12 is respectively fixed in the gap between the bottom of the first lens 111 and the bottom of the second lens 112 and the upper end surface of the main frame 15 and matches therewith. Further, the lens module 3 is provided with an optical channel 31, the optical channel 31 corresponds to the opening of the first cavity 18, and the optical channel 31 is in the direct and refracted light area of ​​the lens group 11;

[0041] The base 16 includes a support column 161 and a support seat 162 . The support seat 162 is arranged around the bottom of the main frame 15 . The support column 161 is fixed to the lower end of the support seat 162 .

[0042] Specifically, the support frame 13 is provided with a recessed portion 132, and the recessed portion 132 is consistent with the spacer portion 115 of the lens group 11. The upper surface of the lens is in contact with the recessed portion 132 of the support frame 13, and the lower surface of the lens is in contact with the support bar 12. By clamping the support frame 13 and the support bar 12, the lens group 11 is firmly fixed on the support frame 13.

[0043] See also Figure 4 and Figure 5 , including a mirror cover 17, the mirror cover 17 is connected to the upper end of the main frame 15 and accommodates the lens group 11, the mirror cover 17 is made of transparent material, the reflected laser is transmitted to the lens group 11 through the mirror cover 17, the mirror cover 17 is provided with an insertion rod 172, and the main frame 15 is provided with a corresponding socket 14, the mirror cover 17 is connected to the main frame 15 by embedding the insertion rod 172 into the socket 14, and the inner upper wall is in conflict with the upper table 131 of the support frame 13.

[0044] See also Figure 8 The distance between the first lens 111 and the second lens 112 of the spacer 115 of the lens group 11 is consistent with the diameter of the opening on the first cavity 18, and the bottom of the first lens 111 and the bottom of the second lens 112 are respectively fixed on both sides of the opening on the first cavity 18;

[0045] Specifically, the contact line Y1 between the first lens 111 and the support frame 13, and the contact line Y2 between the second lens 112 and the support frame 13 are respectively tangent to the outer edge line 19 of the cavity, and the contact line Y1 between the first lens 111 and the support frame 13, and the contact line Y2 between the second lens 112 and the support frame 13 are parallel, and the outer edge line 32 of the channel is completely covered by the outer edge line 19 of the cavity. Since the contact line Y1 between the first lens 111 and the support frame 13, and the contact line Y2 between the second lens 112 and the support frame 13 are respectively tangent to the outer edge line 19 of the cavity, the first cavity 18 can receive the laser transmitted from the lens group 11 to the optical channel 31 to the greatest extent, and at the same time can also reduce the volume of the lens optical device and improve space utilization.

[0046] The utility model changes the placement angle of the first lens 111 and the second lens 112 of the lens group 11 to form an inverted V shape with the first lens 111 and the second lens 112. The distance between the lens group 11 and the lens module 3 does not need to be changed. The receiving and output laser ranges of the lens group 11 are not reduced, and the area in which the lens module 3 cannot recognize clearly due to the interference of the gap angle between the contact parts of the two lenses is greatly reduced. The top ends of the first inclined surface 1111 and the second inclined surface 1121 are flush with the upper table 131 of the support frame 13, and the bottom ends of the first lens 111 and the second lens 112 are respectively fixed on both sides of the first cavity 18. The spacing distance between the first lens 111 and the second lens 112 is consistent with the diameter of the first cavity 18. The utility model has the characteristics of low cost, small space occupation, and more accurate recognition.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lens optical device, characterized in that: The invention comprises a lens group (11), a lens module (3) and a support frame (13), wherein the lens group (11) is fixed on the support frame (13), the lens group (11) comprises a first lens (111) and a second lens (112), the first lens (111) and the second lens (112) are arranged in an inverted V shape, the lens group (11) is provided with a spacing portion (115) and a proximity portion (116), the spacing portion (115) is closer to the lens module (3) than the proximity portion (116), the first inclined surface (1111) of the first lens (111) and the bottom end of the second inclined surface (1121) of the second lens (112) are in contact with each other, and the top ends of the first inclined surface (1111) and the second inclined surface (1121) are flush with the upper surface (131) of the support frame (13); It comprises a laser emitter for use with the object, wherein the laser emitted by the laser emitter is refracted by an object and then transmitted into the lens module (3) through a lens group (11).

2. The lens optical device according to claim 1, characterized in that: The first lens (111) and the second lens (112) are both rectangular parallelepiped structures.

3. The lens optical device according to claim 2, characterized in that: The support frame (13) is provided with a lower concave portion (132), and the lower concave portion (132) is consistent with the spacing portion (115) of the lens group (11).

4. The lens optical device according to claim 2, characterized in that: The first inclined surface (1111) and the second inclined surface (1121) are V-shaped, and the first inclined surface (1111) and the second inclined surface (1121) are respectively two side surfaces of the V-shape.

5. The lens optical device according to claim 1, characterized in that: It comprises a main frame (15), the main frame (15) is provided with a first cavity (18), and the lens module (3) is arranged in the first cavity (18).

6. The lens optical device according to claim 5, characterized in that: The lens module (3) is provided with an optical channel (31), the optical channel (31) corresponds to the opening of the first cavity (18), and the optical channel (31) is within the direct and refracted light area of ​​the lens group (11).

7. The lens optical device according to claim 5, characterized in that: The mirror cover (17) is connected to the upper end of the main frame (15) and accommodates the lens group (11). The mirror cover (17) is made of a transparent material, and the reflected laser is transmitted to the lens group (11) through the mirror cover (17).

8. The lens optical device according to claim 5, characterized in that: The distance between the first lens (111) and the second lens (112) of the spacer (115) of the lens group (11) is consistent with the diameter of the opening on the first cavity (18), and the bottom of the first lens (111) and the bottom of the second lens (112) are respectively fixed on both sides of the opening on the first cavity (18).

9. The lens optical device according to claim 8, characterized in that: The upper end surface of the main frame (15) is provided with a support bar (12), and the support bar (12) is respectively fixed in the gap between the bottom of the first lens (111) and the bottom of the second lens (112) and the upper end surface of the main frame (15) and is consistent therewith.

10. The lens optical device according to claim 7, characterized in that: The mirror cover (17) is provided with an insertion rod (172), and the main frame (15) is provided with a corresponding insertion hole (14). The mirror cover (17) is connected to the main frame (15) by inserting the insertion rod (172) into the insertion hole (14), and the inner upper wall is in contact with the upper table (131) of the support frame (13).

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