CN211925257U - Laser source device for intelligent door lock - Google Patents
Laser source device for intelligent door lock Download PDFInfo
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- CN211925257U CN211925257U CN202020238232.1U CN202020238232U CN211925257U CN 211925257 U CN211925257 U CN 211925257U CN 202020238232 U CN202020238232 U CN 202020238232U CN 211925257 U CN211925257 U CN 211925257U
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Abstract
The utility model discloses a laser source device for intelligent lock, including laser projector and installation the frame of laser projector, the laser projector has the connecting piece, the frame has the through-hole, the rotatable installation of laser projector in the through-hole, the laser projector passes through the connecting piece and connects on the pore wall of through-hole, just the laser projector with the connecting piece is relative for the rotation axis the through-hole pore wall is rotatory, the laser projector passes through the connecting piece with the frame is arbitrary contained angle. The connecting piece comprises a connecting shaft, one end of the connecting shaft is connected with the outer surface of the laser projector, and the other end of the connecting shaft is a free end; the connecting shafts comprise two connecting shafts which are respectively and symmetrically arranged on two sides of the laser projector. Laser source device can avoid the injury of zero order diffraction to the human eye.
Description
Technical Field
The utility model relates to an intelligence lock face identification technical field especially relates to a laser source device for intelligent lock.
Background
At present, a 3D structured light scheme is mainly adopted in the face recognition technology, and the main working principle of the scheme is to project coded or random infrared speckles or light spots to a measured object 1 through an infrared projector 6, the coded or speckle images are irradiated on the measured object 1 and then reflected by the measured object 1 to enter an infrared camera 2 (which may also include a color camera), and after the infrared camera 2 receives the images, the image information is converted into depth information through a triangular algorithm loaded by a back-end circuit, so that a depth image and a cloud image are constructed, and the purpose of 3D reconstruction is achieved.
When the infrared projector projects coded or random infrared speckles or light spots, the light source 3 needs to be adjusted by the collimating system 4, and then the light is irradiated on the object to be measured 1 after being diffracted by the Diffractive Optical Element (DOE)5 installed in front of the infrared projection light source 3, as shown in the schematic diagram of the principle of the structured light device in fig. 1.
The basic principle of the triangulation algorithm is shown in fig. 2, where the angles β and α and the distance L between the light source 3 and the receiving end of the infrared camera 2 are known, and h on the Z-axis, i.e., the depth of a certain point of the object 1 to be measured, can be calculated by simple triangulation.
Based on the principle of triangulation, most of the existing structured light devices adopt two layouts, which are shown in fig. 3 and 4:
(1) in the scheme 1, the basic components of the processing circuit I10 comprise an infrared projector 6 and an infrared camera 2, and the color camera 101 is an optional and monocular scheme.
(2) In the scheme 2, the second processing circuit 11 basically comprises an infrared projector 6 and two infrared cameras 2, and the color camera 101 is an optional binocular scheme.
As shown in the schematic diagram of the infrared laser projection path of the intelligent door lock in fig. 5, a rectangle represents the intelligent door lock 7, the installation height of the intelligent door lock 7 with the structured light face recognition device is generally 90-105cm away from the ground, and "71" in the door lock represents a face recognition module therein. When the face recognition module 71 is installed horizontally, laser light emitted from the infrared projection light source in the module passes through the optical lens and the optical diffraction lens DOE, and then generally forms an image at the door opening distance (about 60cm away from the door) of the human body, as shown by the image in the box in fig. 5, the image irradiates on the face of the human body, and is reflected by the face of the human body and imaged by the infrared camera module 3D in the door lock. The image projected on the face after being scattered by the DOE generally consists of speckle (as shown in fig. 6) or structural coding, and in any kind of image, the middle circular point is zero-order diffraction of the laser, and the image is subjected to the design and manufacture of the diffractive optical lens, so that the zero-order diffraction is difficult to eliminate. The zero-order diffraction light spot can affect the imaging quality and interfere the 3D measurement precision of the system, and the more serious result is that the energy of the zero-order diffraction light is high, and the direct irradiation can cause permanent damage to human eyes.
When a light beam irradiates on the transmission type diffraction grating, … lights with 0 order, plus or minus 1 order and plus or minus 2 order are formed at the rear part of the light beam, and the intensity of 0 order diffraction light is usually obviously higher than … lights with plus or minus 1 order and plus or minus 2 order due to the influence of the manufacturing precision of the grating. The too high 0-order diffraction light on one hand interferes the imaging and on the other hand may cause irreversible damage to the direct-view eye, which does not meet the "1" order laser safety level requirement of the product. (Note: laser safety rating 1 requires "eyes will not receive harmful optical radiation under any conditions. Or, although the product contains harmful laser, it is placed in the corresponding sealed product without any harmful radiation escaping the closure device")
The existing technical scheme for solving zero-order diffraction mainly comprises two types:
(1) the optical power of the infrared light source is reduced, thereby reducing the energy of the zero-order diffracted beam. The disadvantage is that the energy of the coded structured light itself is also reduced, which limits the distance used.
(2) The zero order diffraction is reduced by two diffractive optical elements 5 (DOE). As shown in fig. 7, the zero order diffracted beam from the first DOE is effectively cancelled out by using two DOEs, wherein the two-order beam passing through the first DOE is used to generate the second diffracted image. The diffraction images from the two DOEs overlap to some extent, increasing the difficulty of the algorithm and the difficulty of the design of the diffractive optics.
Therefore, it is urgently needed to provide a new technical solution to solve the problem that the safety of the intelligent door lock is endangered by zero-order diffraction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that exists among the prior art, provide a laser source device for intelligent lock, the technical scheme of its adoption is:
a laser source device for an intelligent door lock comprises a laser projector and a frame,
the laser projector is provided with a connecting piece, the frame is provided with a through hole, the laser projector is rotatably arranged in the through hole, the laser projector is connected on the hole wall of the through hole through the connecting piece, the laser projector is used as a rotating shaft of the connecting piece to be opposite to the hole wall of the through hole, and the laser projector is arranged at any included angle with the frame through the connecting piece.
In a further aspect of the above technical solution, the connecting member includes a connecting shaft, one end of the connecting shaft is connected to an outer surface of the laser projector, and the other end is a free end;
furthermore, the connecting shafts comprise two connecting shafts, and the two connecting shafts are respectively symmetrically arranged on two sides of the laser projector.
Furthermore, a section of rack is continuously arranged on the outer circumferential surface of the free end of the connecting shaft, and the length of the rack is 1/4-1/2 of the circumference of the outer circumferential surface;
and the teeth of the rack are parallel to the central axis direction of the connecting shaft.
Furthermore, the frame is also provided with two grooves, the two grooves are oppositely arranged on the wall of the through hole, the grooves extend into the frame from the surface of the wall of the through hole,
furthermore, the free end of the connecting shaft extends into the groove from the through hole.
Furthermore, the connecting piece still includes the elastic component, the elastic component is connected on the cell wall of recess, the elastic component with the rack conflict on the connecting axle free end.
Furthermore, the elastic part comprises a rubber ring and/or a sponge gasket, the rubber ring and/or the sponge gasket is arranged around 1/4-1/2 rings along the groove wall,
the elastic piece is fixed on the groove wall of the groove.
Further, the frame includes an upper frame and a lower frame,
further, the upper frame and the lower frame are symmetrically arranged along the central axis direction of the connecting piece,
further, the upper frame and the lower frame form a through hole for accommodating the laser projector, and the upper frame and the lower frame form a groove for accommodating the connecting piece;
furthermore, the groove wall of the groove on the upper frame or the lower frame is connected with the elastic piece;
further, the upper frame and the lower frame are fixedly connected through a fastener.
Furthermore, the connecting piece comprises an elastic connecting arm which is of a telescopic structure, one end of the elastic connecting arm is connected with the side surface of the laser projector, the other end of the elastic connecting arm is a free end with a magnetic device, a magnet matched with the magnetic device is arranged on the wall of the through hole,
furthermore, the laser projector is adsorbed on the magnet on the hole wall of the through hole through the magnetic attraction device at the free end of the elastic connecting arm, and the laser projector can form any included angle relative to the hole wall of the through hole.
Furthermore, the laser beam emitted by the laser projector extends upwards in an inclined way relative to the horizontal plane, and the included angle between the laser beam and the horizontal plane is 58-90 degrees.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a laser source device can avoid the injury of zero order diffraction to the human eye, compares the structured light device among the prior art, and this device has effectively avoidd the injury of zero order diffraction to the human eye with the physical method through analyzing the cause of zero order diffraction;
2. the laser source device is used for face recognition of the intelligent door lock, the laser source device is arranged on a face recognition module of the intelligent door lock, the laser source device can rotate in the module, and the angle of the laser source device is adjusted, so that the laser source device can ensure that the strongest light beam of zero-order diffraction is out of a certain distance away from the door and is higher than the height of the ordinary human eyes under the normal distance between the general height of the door lock and the normal distance between the human body and the door, the design can ensure that the projected image can cover the recognized face and can ensure that the zero-order diffraction can not directly irradiate the human eyes;
3. compared with the prior art, the method for eliminating zero-order diffraction does not need to reduce the power of the infrared projection light source, and has no limit on the use distance of the face recognition device;
4. compared with the prior art, the method for eliminating zero-order diffraction of the laser source device DOEs not need to load two optical diffraction elements (DOEs), and the realization difficulty of a triangular algorithm and the design and processing difficulty of a diffraction optical device cannot be caused;
5. laser source device simple structure, the principle is clear and definite, laser projector can be integrated into one piece with the connecting piece on it, if laser projector's shell is plastics, then the connecting piece can with laser projector's shell is through injection molding process integrated into one piece, if laser projector's shell is the metal, then the connecting piece can with laser projector's shell becomes a body structure through the welding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a structured light device in the background art;
FIG. 2 is a schematic diagram of the basic principle of the prior art trigonometric algorithm, wherein L represents a baseline distance;
FIG. 3 is a schematic block diagram of scheme 1 in two layout scenarios of a structured light device according to the background art;
FIG. 4 is a schematic block diagram of scheme 2 of two layout schemes of a structured light device according to the background art;
FIG. 5 is a schematic diagram of an infrared laser projection path of an intelligent door lock according to the prior art, wherein A is an image spot projected by an infrared laser at a distance of 60cm from a door panel;
FIG. 6 is a schematic diagram of the effect of image spot A derived from FIG. 5;
FIG. 7 is a schematic diagram illustrating the effect of the two-stage diffractive optical element of the prior art on reducing zero-order diffraction;
fig. 8 is a three-dimensional schematic diagram of the overall structure of the laser source device according to the present invention;
fig. 9 is a schematic structural diagram of an upper frame of the laser source device according to the present invention;
fig. 10 is a schematic structural view of the elastic member of the laser source device according to the present invention;
fig. 11 is a schematic structural view of a lower frame of the laser source device according to the present invention;
fig. 12 is a schematic three-dimensional structure of a laser projector of the laser source device according to the present invention;
fig. 13 is a schematic side plan view of a laser projector according to the present invention;
fig. 14 is an exploded view of a laser projector of the laser source device according to the present invention;
fig. 15 is a schematic diagram of a laser projection path of the laser source device according to the present invention in a use state;
fig. 16 is a schematic diagram of the laser source apparatus of the present invention;
FIG. 17 is a schematic cross-sectional view of the camera of FIG. 16 along direction AA;
FIG. 18 is a schematic cross-sectional view of the infrared projector of FIG. 16 along the BB direction;
fig. 19 is a schematic view of the slotted structure of the laser projector with adjustable inclination angle, and the view is a plan view of the laser projector in the installation state;
fig. 20 is a schematic cross-sectional view of the laser projector of fig. 19 in the assembled state, taken along the direction CC.
Wherein, 1-object to be measured, 2-infrared camera, 3-light source, 4-collimation system, 5-Diffraction Optical Element (DOE), 6-infrared projector, 7-intelligent door lock, 71-face recognition module,
8-laser projector, 81-connecting piece, 811-connecting shaft, 8111-free end, 8112-rack, 812-elastic piece, 9-frame, 91-through hole, 92-groove, 93-upper frame and 94-lower frame;
10-processing circuit one, 101-color camera (optional), 11-processing circuit two; 12-eye.
Detailed Description
The technical solutions of the embodiments of the present invention will be examined and fully described below with reference to the accompanying drawings of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example (b):
the gist of the present invention will be further explained with reference to the accompanying drawings and examples.
Fig. 8 is a three-dimensional schematic diagram of the overall structure of the laser source device according to the present invention; fig. 9 is a schematic structural diagram of an upper frame of the laser source device according to the present invention; fig. 10 is a schematic structural view of the elastic member of the laser source device according to the present invention; fig. 11 is a schematic structural view of a lower frame of the laser source device according to the present invention; fig. 12 is a schematic three-dimensional structure of a laser projector of the laser source device according to the present invention; fig. 13 is a schematic side plan view of a laser projector according to the present invention; fig. 14 is an exploded view of a laser projector of the laser source device according to the present invention; fig. 15 is a schematic diagram of a laser projection path of the laser source device according to the present invention in a use state; fig. 16 is a schematic diagram of the laser source device according to the present invention, and fig. 17 is a schematic cross-sectional view of the camera in the AA direction in fig. 16; FIG. 18 is a schematic cross-sectional view of the infrared projector of FIG. 16 along the BB direction; fig. 19 is a schematic view of the slotted structure of the laser projector with adjustable inclination angle, and the view is a plan view of the laser projector in the installation state; fig. 20 is a schematic cross-sectional view of the laser projector of fig. 19 in the assembled state, taken along the direction CC.
Referring to fig. 8 to 14, a laser source device for an intelligent door lock, includes a laser projector 8 and a frame 9,
the laser projector 8 is provided with a connecting piece 81, the frame 9 is provided with a through hole 91, the laser projector 8 is rotatably arranged in the through hole 91, the laser projector 8 is connected on the hole wall of the through hole 91 through the connecting piece 81, the laser projector 8 is opposite to the connecting piece 81 serving as a rotating shaft, the hole wall of the through hole 91 is rotated, and the laser projector 8 is connected with the frame 9 through the connecting piece 81 to form any included angle.
Further, the connecting piece 81 comprises a connecting shaft 811, one end of the connecting shaft 811 is connected with the outer surface of the laser projector 8, and the other end is a free end 8111;
furthermore, the connecting shafts 811 include two connecting shafts 811, and the two connecting shafts 811 are respectively symmetrically arranged on two sides of the laser projector 8.
Furthermore, a section of rack 8112 is continuously arranged on the outer circumferential surface of the free end 8111 of the connecting shaft 811, and the length of the rack 8112 accounts for 1/4-1/2 of the circumference of the outer circumferential surface;
further, the teeth of the rack 8112 are parallel to the central axis direction of the connecting shaft 811.
Further, the frame 9 is further provided with two grooves 92, the two grooves 92 are oppositely arranged on the hole wall of the through hole 91, the grooves 92 extend from the surface of the hole wall of the through hole 91 to the inside of the frame 9,
further, a free end 8111 of the connecting shaft 811 extends into the groove 92 from the through hole 91.
Further, the connecting member 81 further includes an elastic member 812, the elastic member 812 is connected to a groove wall of the groove 92, and the elastic member 812 interferes with the rack 8112 on the free end 8111 of the connecting shaft 811.
Furthermore, the elastic component 812 comprises a rubber ring and/or a sponge gasket, wherein 1/4-1/2 rings are wound around the groove wall of the groove 92,
further, the elastic member 812 is fixed on a groove wall of the groove 92.
Further, the frame 9 includes an upper frame 93 and a lower frame 94,
further, the upper frame 93 and the lower frame 94 are symmetrically disposed along the central axis direction of the connection member 81,
further, the upper frame 93 and the lower frame 94 form a through hole 91 for accommodating the laser projector 8, and the upper frame 93 and the lower frame 94 form a groove 92 for accommodating the connecting member 81;
further, the groove wall of the groove 92 on the upper frame 93 or the lower frame 94 is connected with the elastic element 812;
further, the upper frame 93 and the lower frame 94 are fixedly coupled by a fastener.
Furthermore, the laser beam emitted by the laser projector 8 extends upwards in an inclined manner relative to the horizontal plane, and the included angle between the laser beam and the horizontal plane is 58-90 degrees.
Furthermore, the laser projector 8 of the present invention can be installed by connecting with an elastic connecting arm 81, i.e. the connecting element 81 comprises an elastic connecting arm, the elastic connecting arm is a telescopic structure, one end of the elastic connecting arm is connected with the side surface of the laser projector 8, the other end of the elastic connecting arm is a free end with a magnetic device, a magnet matched with the magnetic device is arranged on the hole wall of the through hole 91,
the magnetic attraction device and the magnet are mutually attracted by magnetic force, namely, the laser projector 8 is mutually attracted and fixed by the magnetic attraction device on the elastic connecting arm and the magnet on the hole wall of the through hole 91,
the end of the elastic connecting arm provided with the magnetic attraction device is of a telescopic structure relative to the laser projector 8, before installation, the elastic connecting arm is in an extension state, when in installation, the extended elastic connecting arm is pressed into the through hole, the elastic connecting arm is in a compression state at the moment, and the magnetic attraction device on the elastic connecting arm is in magnetic attraction connection with the magnet,
furthermore, the laser projector 8 is adsorbed on the magnet on the hole wall of the through hole 91 through the magnetic attraction device at the free end of the elastic connecting arm, and the laser projector 8 can form any included angle relative to the hole wall of the through hole 91.
With reference to fig. 15, in the face recognition module 71 of the intelligent door lock 7, the light source of the laser projector is tilted upward by using the frame supporting structure of the module itself, so that the projection direction of the light beam forms an angle of at least 58 degrees with the horizontal plane, and thus, under the normal height of the door lock installation and the normal distance of the human body from the door (about 60cm), the height of the zero-order diffracted light beam outside the door 60cm can be ensured to reach 190cm, which is higher than the eye 12 height of the ordinary person, thereby preventing the zero-order light beam from directly irradiating the retina of the person.
As shown in fig. 16-18, in the proposed solution, the camera is placed horizontally and the infrared projection device 6 is tilted slightly upwards. The inclination angle is larger than 58 degrees, so that the lower half part of the projected image covers the face to be recognized, the interference of zero-order diffraction on 3D recognition precision is avoided, and more importantly, the retina of human eyes of a recognized person is protected from being damaged by the zero-order diffraction of laser.
According to the placing position of the general face recognition module and the distance between a person and the module, the utility model is provided with a structure that the upward inclination angle of the light source is more than 58 degrees and the angle is convenient to adjust; according to different heights of users, the projection angle of a light source can be fixed within a certain range when the laser projector is installed, the cylindrical connecting shafts on two sides of the laser projector 8 are designed as shown in figures 12 and 13, and the free end of each connecting shaft is provided with 1/4-1/2 circles of racks 8112; the frame structure for placing the light source is divided into an upper part and a lower part, the upper frame 93 and the lower frame 94 are not identical in structure, as shown in fig. 9-11, the upper frame 93 is arranged in a groove 92 for placing a connecting shaft 811 of the projector, two rubber or sponge washers with the same thickness as the tooth height and width of the rack of the projector are arranged in the upper frame 93, and the washer part and the upper frame 93 are completely fixed by glue or other means. The groove 92 of the lower frame 94 and the connecting shaft 811 of the light source projector are in interference fit to ensure a certain tightness during assembly, but the angle adjustment is not affected.
When assembling, the projector 8 is adjusted to a proper angle, the connecting shafts 811 on both sides are first installed in the lower frame 94, and then the upper frame 93 is pressed down to be completely attached to the projector 8 and the lower frame 94, and the fixing is completed by screws. At this point, the rubber and sponge washer of the upper frame 93 will fully engage the rack 8112 of the projector 8. Since the rim portion is fully secured to the upper frame 93, the projector 8 is also secured.
The inclination of the projection angle of the light source is realized by a frame 9 structure for fixing the light source. Two connecting shafts 811 are arranged on two sides of the laser projection light source casing, and the connecting shafts 811 are consistent with the casing material.
(1) The shell is metal casing, can weld these two connecting axles 811 in the both sides of shell, bilateral symmetry through the welding, and the axis of connecting axle 811 passes through the middle department of light source shell.
(2) If the housing is made of plastic, the two connecting shafts 811 can be integrally formed with the housing by an injection molding process.
The frame 9 for placing the light source can be realized by the above structure, the upper frame 93 and the lower frame 94 are spliced, and the connecting shaft 811 of the light source is embedded into the grooves 92 at two sides of the through hole 91 of the frame 9 to realize vertical rotation, thereby realizing upward inclination.
As shown in fig. 19-20, the upward-inclination angle of the slot in the frame 9 for placing the light source is varied from 58 ° to 90 ° according to different applications, and is a range of angles.
The laser source device is used for face recognition of the intelligent door lock, the laser source device is arranged on a face recognition module of the intelligent door lock, the laser source device can rotate in the module, and the angle of the laser source device is adjusted, so that the laser source device can ensure that the strongest light beam of zero-order diffraction is out of a certain distance away from the door and is higher than the height of the ordinary human eyes under the normal distance between the general height of the door lock and the normal distance between the human body and the door, the design can ensure that the projected image can cover the recognized face and can ensure that the zero-order diffraction can not directly irradiate the human eyes;
compared with the prior art, the method for eliminating zero-order diffraction does not need to reduce the power of the infrared projection light source, and has no limit on the use distance of the face recognition device;
compared with the prior art, the method for eliminating zero-order diffraction of the laser source device DOEs not need to load two optical diffraction elements (DOEs), and the realization difficulty of a triangular algorithm and the design and processing difficulty of a diffraction optical device cannot be caused;
laser source device simple structure, the principle is clear and definite, laser projector can be integrated into one piece with the connecting piece on it, if laser projector's shell is plastics, then the connecting piece can with laser projector's shell is through injection molding process integrated into one piece, if laser projector's shell is the metal, then the connecting piece can with laser projector's shell becomes a body structure through the welding.
To sum up, laser source device can avoid the injury of zero order diffraction to the human eye, compare the structured light device among the prior art, this device analyzes through the cause to zero order diffraction to the physical method has effectively avoidd the injury of zero order diffraction to the human eye.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.
While embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications and changes may be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A laser source device for an intelligent door lock, characterized in that: comprising a laser projector (8) and a frame (9),
laser projector (8) has connecting piece (81), frame (9) has through-hole (91), rotatable the installing in of laser projector (8) in through-hole (91), laser projector (8) are connected through connecting piece (81) on the pore wall of through-hole (91), just laser projector (8) with connecting piece (81) are relative for the rotation axis through-hole (91) pore wall is rotatory, laser projector (8) pass through connecting piece (81) with frame (9) are arbitrary contained angle.
2. Laser source device according to claim 1, characterized in that: the connecting piece (81) comprises a connecting shaft (811), one end of the connecting shaft (811) is connected with the outer surface of the laser projector (8), and the other end of the connecting shaft (811) is a free end (8111);
the connecting shafts (811) comprise two connecting shafts (811), and the two connecting shafts (811) are symmetrically arranged on two sides of the laser projector (8) respectively.
3. Laser source device according to claim 2, characterized in that: the outer circumferential surface of the free end (8111) of the connecting shaft (811) is continuously provided with a section of rack (8112), and the length of the rack (8112) accounts for 1/4-1/2 of the circumference of the outer circumferential surface;
the teeth of the rack (8112) are parallel to the central axis direction of the connecting shaft (811).
4. Laser source device according to claim 2, characterized in that: the frame (9) is also provided with two grooves (92), the two grooves (92) are oppositely arranged on the wall of the through hole (91), the grooves (92) extend from the surface of the wall of the through hole (91) to the inside of the frame (9),
and the free end (8111) of the connecting shaft (811) extends into the groove (92) from the through hole (91).
5. Laser source device according to claim 4, characterized in that: the connecting piece (81) further comprises an elastic piece (812), the elastic piece (812) is connected to the groove wall of the groove (92), and the elastic piece (812) is abutted to the rack (8112) on the free end (8111) of the connecting shaft (811).
6. Laser source device according to claim 5, characterized in that: the elastic piece (812) comprises a rubber ring and/or a sponge gasket, the rubber ring and/or the sponge gasket is arranged in a winding way for 1/4-1/2 circles along the groove wall of the groove (92),
the elastic piece (812) is fixed on the groove wall of the groove (92).
7. Laser source device according to claim 5, characterized in that: the frame (9) comprises an upper frame (93) and a lower frame (94),
the upper frame (93) and the lower frame (94) are symmetrically arranged in the central axis direction of the connecting member (81),
the upper frame (93) and the lower frame (94) forming a through hole (91) accommodating the laser projector (8), the upper frame (93) and the lower frame (94) forming a groove (92) accommodating the connector (81);
the groove wall of the groove (92) on the upper frame (93) or the lower frame (94) is connected with the elastic piece (812);
the upper frame (93) and the lower frame (94) are fixedly connected through fasteners.
8. Laser source device according to claim 1, characterized in that: the connecting piece (81) comprises an elastic connecting arm which is of a telescopic structure, one end of the elastic connecting arm is connected with the side surface of the laser projector (8), the other end of the elastic connecting arm is a free end with a magnetic suction device, a magnet matched with the magnetic suction device is arranged on the hole wall of the through hole (91),
the laser projector (8) is adsorbed on the magnet on the hole wall of the through hole (91) through the magnetic attraction device at the free end of the elastic connecting arm, and the laser projector (8) can be opposite to the hole wall of the through hole (91) and form any included angle.
9. Laser source device according to claim 1, characterized in that: the laser beam emitted by the laser projector (8) extends upwards in an inclined way relative to the horizontal plane, and the included angle between the laser beam and the horizontal plane is 58-90 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020238232.1U CN211925257U (en) | 2020-03-02 | 2020-03-02 | Laser source device for intelligent door lock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020238232.1U CN211925257U (en) | 2020-03-02 | 2020-03-02 | Laser source device for intelligent door lock |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237603A (en) * | 2020-03-02 | 2020-06-05 | 苏州中为联创微纳制造创新中心有限公司 | Laser source device for intelligent door lock |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237603A (en) * | 2020-03-02 | 2020-06-05 | 苏州中为联创微纳制造创新中心有限公司 | Laser source device for intelligent door lock |
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