CN212647496U - Palm image acquisition equipment - Google Patents

Abstract

The application discloses palm image acquisition equipment, which comprises a frame body, a main circuit board arranged in the frame body, an image acquisition module arranged on the main circuit board, a lens assembly arranged on the main circuit board and covering the image acquisition module, a cover plate opposite to the main circuit board and arranged at intervals, and a lamp panel positioned between the cover plate and the main circuit board; the lamp panel is provided with a first abdicating hole for the lens component to pass through; the lens component penetrates through the first abdicating hole; a gap is formed between the lens component and the cover plate; the cover plate is provided with a light-transmitting area corresponding to the lens component; the lamp plate is provided with at least one light source, and light rays emitted by the light source can pass through the cover plate. The main circuit board, the lamp plate and the cover plate are all installed in the frame, a first yielding hole for the lens assembly to pass through is formed in the lamp plate, the lens assembly can be arranged around the main body of the lamp plate, and parts such as a light source on the lamp plate and a light source on the lamp plate cannot occupy the installation height in the thickness direction of the frame, so that the inner space of the palm image acquisition equipment is compact enough.

Description

Palm image acquisition equipment

Technical Field

The application relates to the field of biological information acquisition equipment, in particular to palm image acquisition equipment.

Background

The palm image (vein and/or surface texture) identification is a biological identification technology which irradiates a palm, a finger and a back of a hand through a light source with a specific working wavelength and utilizes an image sensor to obtain a vein and/or surface texture distribution image for matching identification, the vein image identification has the advantages of high identification rate, non-contact acquisition, incapability of counterfeiting living body identification, difficulty in stealing biological characteristics and the like, and therefore, the palm vein and/or surface texture image identification is particularly suitable for places with higher safety level requirements. However, the palm image acquisition equipment in the prior art is complex in structure, and the internal structure of the equipment is not compact, so that the equipment is large in size.

SUMMERY OF THE UTILITY MODEL

The purpose of this application lies in providing a palm image acquisition equipment, aims at solving prior art, and the structure of palm image acquisition equipment is not compact problem.

To achieve the purpose, the embodiment of the application adopts the following technical scheme:

the palm image acquisition equipment comprises a frame body, a main circuit board arranged in the frame body, an image acquisition module arranged on the main circuit board, a lens assembly arranged on the main circuit board and covering the image acquisition module, a cover plate opposite to the main circuit board and arranged at intervals, and a lamp panel positioned between the cover plate and the main circuit board; the lamp panel is provided with a first abdicating hole for the lens component to pass through; the lens assembly penetrates through the first abdicating hole; a gap is formed between the lens assembly and the cover plate; the cover plate is provided with a light-transmitting area corresponding to the lens component; at least one light source is arranged on the lamp panel, and light rays emitted by the light source can pass through the cover plate.

In one embodiment, the inner wall of the frame body is provided with a mounting plate; the cover plate is bonded on the mounting plate; the cover plate is located in the frame on the surface of the cover plate far away from the main circuit board.

In one embodiment, one side of the mounting plate, which is far away from the cover plate, is provided with a plurality of positioning columns, and the lamp panel is provided with positioning holes corresponding to the positioning columns.

In one embodiment, a plurality of first connecting columns are arranged on one side of the mounting plate away from the cover plate, and first threaded holes are formed in the first connecting columns; a first connecting through hole corresponding to the first threaded hole is formed in the lamp panel; a first connecting screw is arranged between the lamp panel and the first connecting column; the first connecting screw penetrates through the first connecting through hole and is in threaded connection with the first threaded hole.

In one embodiment, one side of the mounting plate, which is far away from the cover plate, is provided with a plurality of second connecting columns, and the lamp panel is provided with abdicating notches for the second connecting columns to pass through; a second threaded hole is formed in the second connecting column; a second connecting through hole corresponding to the second threaded hole is formed in the main circuit board; a second connecting screw is arranged between the main circuit board and the second connecting column; and the second connecting screw penetrates through the second connecting through hole and is in threaded connection with the second threaded hole.

In one embodiment, the main circuit board is provided with a second abdicating hole for the first connecting screw to pass through.

In one embodiment, the lamp panel is further provided with a lamp cup piece; the lamp cup piece comprises a light blocking ring arranged around the light source and a condensing lens connected with the light blocking ring. (first joint hole has been seted up on the lamp plate, be equipped with on the light barrier adapt in the first joint arch in first joint hole)

In one embodiment, the lamp panel is provided with a light shading piece; the light shading piece is arranged around the lens component; the light shading piece is abutted with the cover plate; the light shading piece is provided with a light inlet corresponding to the light transmitting area; one end of the lens assembly, which is far away from the main circuit board, is positioned in the light inlet hole. (second joint hole is opened on the lamp plate, second joint bulge adapted to the second joint hole is arranged on the shading piece)

In one embodiment, a proximity detection sensor is arranged on the lamp panel; the light shielding piece is provided with a light emitting outlet and a reflected light inlet corresponding to the proximity detection sensor.

In one embodiment, the frame body is provided with a plurality of heat dissipation holes; the lamp panel is provided with a first plate to the plate terminal, and the lamp panel is provided with an adapter to the plate terminal of a second plate of the first plate to the plate terminal. (the light source is a near infrared lamp with 850 nm wavelength (or 400 nm-1200 nm), or the light source is a laser lamp, the lens assembly comprises a lens base fixedly arranged on the main circuit board and a lens in threaded connection with the lens base)

The beneficial effects of the embodiment of the application are as follows: the main body frame that the palm image acquisition equipment was regarded as to the framework, and main circuit board, lamp plate and apron are all installed in the inside of framework, and the lamp plate is offered in order to supply the first hole of stepping down that the lens subassembly passes through, and consequently the main part of lamp plate can encircle the lens subassembly setting, and parts such as light source on consequently lamp plate and the lamp plate also can not occupy extra mounting height in the thickness direction of framework for the enough compactness of inner space of palm image acquisition equipment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a palm image capture device in an embodiment of the present application;

FIG. 2 is an exploded view of a palm image capture device in an embodiment of the present application;

FIG. 3 is a cross-sectional view of a palm image capture device in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a frame body according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a lamp panel in an embodiment of the present application;

in the figure:

1. a frame body; 101. mounting a plate; 102. a positioning column; 103. a first connecting column; 104. a second connecting column; 105. heat dissipation holes;

2. a main circuit board; 201. a second connecting through hole; 202. a second abdicating hole; 203. a first board-to-board terminal;

3. an image acquisition module;

4. a lens assembly; 401. a lens holder; 402. a lens;

5. a cover plate; 501. a light-transmitting region;

6. a lamp panel; 601. a first abdicating hole; 602. a light source; 603. positioning holes; 604. a first connecting through hole; 605. a abdication gap; 606. a first clamping hole; 607. a second clamping hole; 608. a proximity detection sensor; 609. a second board-to-board terminal;

7. a lamp cup piece; 701. a light blocking ring; 702. a condenser lens; 703. a first clamping protrusion;

8. a light shielding member; 801. a light inlet hole; 802. a second clamping protrusion; 803. an emitted light outlet; 804. the reflected light enters.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The following detailed description of implementations of the present application is provided in conjunction with specific embodiments.

As shown in fig. 1 to fig. 3, an embodiment of the present application provides a palm image capturing device, which includes a frame 1, a main circuit board 2 installed in the frame 1, an image capturing module 3 installed on the main circuit board 2, a lens assembly 4 installed on the main circuit board 2 and covering the image capturing module 3, a cover plate 5 opposite to the main circuit board 2 and disposed at an interval, and a lamp panel 6 located between the cover plate 5 and the main circuit board 2; the lamp panel 6 is provided with a first abdicating hole 601 through which the lens component 4 passes; the lens component 4 penetrates through the first abdicating hole 601; a gap is formed between the lens component 4 and the cover plate 5; the cover plate 5 is provided with a light-transmitting area 501 corresponding to the lens component 4; the lamp panel 6 has at least one light source 602, and light emitted by the light source 602 can pass through the cover 5 (the part of the cover 5 outside the light-transmitting area 501 is a plate capable of passing through a specific wavelength, and is made of a certain material or a plurality of materials according to requirements).

In the embodiment of the application, framework 1 is as the main body frame of palm image acquisition equipment, main circuit board 2, lamp plate 6 and apron 5 are all installed in framework 1's inside, and lamp plate 6 sets up the first hole 601 of stepping down that passes through in order to supply lens subassembly 4, therefore the main part of lamp plate 6 can encircle lens subassembly 4 and set up, consequently parts such as light source 602 on lamp plate 6 and the lamp plate 6 also can not occupy extra mounting height in framework 1's thickness direction (the direction of perpendicular main circuit board 2), make the inner space of palm image acquisition equipment compact enough. The thickness of the palm image capture device approaches the height of the lens assembly 4, the thickness of the main circuit board 2, the thickness of the cover plate 5, and the sum of the gaps between the lens assembly 4 and the cover plate 5, thereby making the thickness of the palm image capture device sufficiently small.

Referring to fig. 2 to 4, as another embodiment of the palm image capturing device provided in the present application, a mounting plate 101 is disposed on an inner wall of the frame 1; the cover plate 5 is bonded on the mounting plate 101; the surface of the cover plate 5 on the side away from the main circuit board 2 is positioned in the frame body 1. The cover plate 5 is mounted inside the frame body 1 through the mounting plate 101, so that the cover plate 5 does not protrude out of the surface of the frame body 1, and the structure of the palm image acquisition device is further compact.

Referring to fig. 2-5, as another embodiment of the palm image capturing apparatus provided in the present application, a plurality of positioning posts 102 are disposed on a side of the mounting plate 101 away from the cover plate 5, and a positioning hole 603 corresponding to the positioning posts 102 is disposed on the lamp panel 6. The lamp plate 6 is installed in the frame 1 through the positioning column 102, so that the lamp plate 6 can be preliminarily positioned in the frame 1, the positioning column 102 is located on the installation plate 101, the structure for positioning the lamp plate 6 is also located in the frame 1, and the compactness of the structure of the palm image acquisition equipment is further realized.

Referring to fig. 2 to 5, as another embodiment of the palm image capturing apparatus provided in the present application, a plurality of first connecting posts 103 are disposed on a side of the mounting plate 101 away from the cover plate 5, and first threaded holes are disposed on the first connecting posts 103; a first connecting through hole 604 corresponding to the first threaded hole is formed in the lamp panel 6; a first connecting screw is arranged between the lamp panel 6 and the first connecting column 103; the first connection screw penetrates the first connection through hole 604 and is threadedly coupled with the first threaded hole. First connecting post 103 is located mounting panel 101, consequently also is located the inside of framework 1 to most structures that lamp plate 6 is fixed, further realizes the compactness of palm image acquisition equipment's structure.

Referring to fig. 2-5, as another specific embodiment of the palm image capturing device provided in the present application, a plurality of second connecting posts 104 are disposed on one side of the mounting plate 101 away from the cover plate 5, and an abdicating notch 605 for the second connecting posts 104 to pass through is disposed on the lamp panel 6; a second threaded hole is formed in the second connecting column 104; a second connecting through hole 201 corresponding to the second threaded hole is formed in the main circuit board 2; a second connecting screw is arranged between the main circuit board 2 and the second connecting column 104; the second connection screw penetrates through the second connection through hole 201 and is in threaded connection with the second threaded hole. The second connecting column 104 is located on the mounting board 101, so that most of the structure for fixing the main circuit board 2 is also located inside the frame body 1, and the structure of the palm image capture device is further compact.

Referring to fig. 2 to 4, as another specific embodiment of the palm image capturing device provided in the present application, the main circuit board 2 is provided with a second abdicating hole 202 for the first connecting screw to pass through, so that the main circuit board 2 can be locked when the lamp panel 6 is locked by the first connecting screw, and the number of locking components of the palm image capturing device is reduced.

Referring to fig. 2 to 4, as another specific embodiment of the palm image capturing device provided in the present application, a lamp cup 7 is further disposed on the lamp panel 6; the lamp cup member 7 includes a light-blocking ring 701 disposed around the light source 602, and a condenser lens 702 connected to the light-blocking ring 701. The light blocking ring 701 can prevent light emitted by the light source 602 from being directed to the inside of the frame body 1, prevent stray light from entering the lens assembly 4 and affecting the accuracy of the acquired image, and can also avoid waste of light and influence on other components. The condenser lens 702 is used to condense the light from the light source 602, increasing the illumination intensity in the center.

Referring to fig. 2 to 5, as another specific embodiment of the palm image capturing device provided in the present application, a first clamping hole 606 is formed in the lamp panel 6, and a first clamping protrusion 703 adapted to the first clamping hole 606 is formed on the light blocking ring 701, so as to implement installation of the lamp cup 7.

Referring to fig. 2 to 3, as another embodiment of the palm image capturing device provided in the present application, a light shielding member 8 is installed on the lamp panel 6; the light shield 8 is arranged around the lens assembly 4; the shading piece 8 is abutted with the cover plate 5; the light shielding piece 8 is provided with a light inlet hole 801 corresponding to the light transmitting area 501; the end of the lens assembly 4 remote from the main circuit board 2 is located in the light inlet 801. The light-shielding member 8 can prevent light in the palm image capturing device from entering the lens assembly 4, and prevent the image capturing module 3 from being affected by the internal light source 602.

Referring to fig. 2-5, as another specific embodiment of the palm image capturing device provided in the present application, a second fastening hole 607 is formed in the lamp panel 6, and a second fastening protrusion 802 adapted to the second fastening hole 607 is formed on the light shielding member 8, so as to implement installation of the light shielding member 8.

Referring to fig. 2, as another specific embodiment of the palm image capturing device provided in the present application, a proximity detection sensor 608 is disposed on the lamp panel 6; the light shielding member 8 is provided with a light emitting outlet 803 and a light reflecting inlet corresponding to the proximity sensor 608. The 804 proximity detection sensor 608 is used to detect whether the palm is in proximity to the palm image capture device, and after the proximity information is analyzed and processed by the main circuit board 2, the main circuit board 2 controls whether the light source 602 of the palm image capture device starts to operate.

Referring to fig. 1, as another embodiment of the palm image capturing device provided in the present application, a plurality of heat dissipation holes 105 are formed in a frame 1, and the heat dissipation holes 105 may be located on two opposite side surfaces of the frame 1 to achieve better air convection; be equipped with first board on main circuit board 2 to board terminal 203, be equipped with on the lamp plate 6 and adapt to the second board of first board to board terminal 203 to board terminal 609 to connect the cooperation of inserting and realize electric connection and fixed.

Referring to fig. 2, as another embodiment of the palm image capturing device provided in the present application, the light source 602 is a laser lamp, or the light source 602 is a near-infrared lamp with a wavelength of 850 nm; the lens assembly 4 includes a lens holder 401 fixedly mounted to the main circuit board 2, and a lens 402 screw-coupled to the lens holder 401.

The working process of the palm image acquisition equipment can be as follows:

after the device is powered on, the power supply voltage stabilizing unit generates working circuits of each circuit, after the image acquisition module 3 works normally, each part (the proximity detection sensor 608 and the like) is initialized, after the initialization is completed, whether a target approaches the proximity detection sensor 608 is periodically inquired, and when an object approaches, a palm image acquisition state is entered;

when the palm image acquisition state is entered, the driving circuit of the light source 602 controlled by the image acquisition module 3 is turned on, the driving circuit drives the light source 602 to generate light (for example, light with a wavelength of 850 nm) in a constant current or pulse mode, and the light is focused by the cup piece 7 to increase the illumination intensity of the central area, and then the light is irradiated on the palm through the cover plate 5 (which may be made of acrylic material);

the light with the wavelength of 850 nanometers is near infrared light, because palm skin has certain penetrating power, and hemoglobin has different absorptivity to different wavelengths of near infrared light, after palm surface/subcutaneous vein reflection, part of light returns along the original route and enters the lens assembly 4 through the cover plate 5 again, and focuses on the image acquisition module 3, convert optical signals into electrical signals, finally enter the image processing chip of the image acquisition module 3 to receive and process, and transmit to the host computer through the USB interface, finish the algorithm analysis processing of palm images again, according to user operation, carry out palm registration/contrast or other processing.

It is to be understood that aspects of the present invention may be practiced otherwise than as specifically described.

It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims (10)

1. The palm image acquisition equipment is characterized by comprising a frame body, a main circuit board arranged in the frame body, an image acquisition module arranged on the main circuit board, a lens assembly arranged on the main circuit board and covering the image acquisition module, a cover plate opposite to the main circuit board and arranged at intervals, and a lamp panel positioned between the cover plate and the main circuit board; the lamp panel is provided with a first abdicating hole for the lens component to pass through; the lens assembly penetrates through the first abdicating hole; the cover plate is provided with a light-transmitting area corresponding to the lens component; at least one light source is arranged on the lamp panel, and light rays emitted by the light source can pass through the cover plate.

2. The palm image capture device of claim 1, wherein the inner wall of the frame is provided with a mounting plate; the cover plate is bonded on the mounting plate; the cover plate is located in the frame on the surface of the cover plate far away from the main circuit board.

3. The palm image acquisition device according to claim 2, wherein a plurality of positioning columns are arranged on one side of the mounting plate away from the cover plate, and positioning holes corresponding to the positioning columns are formed in the lamp panel.

4. The palm image acquisition device according to claim 3, wherein a plurality of first connecting posts are provided on one side of the mounting plate away from the cover plate, and first threaded holes are provided on the first connecting posts; a first connecting through hole corresponding to the first threaded hole is formed in the lamp panel; a first connecting screw is arranged between the lamp panel and the first connecting column; the first connecting screw penetrates through the first connecting through hole and is in threaded connection with the first threaded hole.

5. The palm image acquisition device according to claim 4, wherein a plurality of second connecting columns are arranged on one side of the mounting plate away from the cover plate, and the lamp plate is provided with abdicating notches for the second connecting columns to pass through; a second threaded hole is formed in the second connecting column; a second connecting through hole corresponding to the second threaded hole is formed in the main circuit board; a second connecting screw is arranged between the main circuit board and the second connecting column; and the second connecting screw penetrates through the second connecting through hole and is in threaded connection with the second threaded hole.

6. The palm image acquisition device according to claim 4, wherein the main circuit board is provided with a second abdicating hole for the first connecting screw to pass through.

7. The palm image acquisition device according to claim 1, wherein the lamp panel is further provided with a lamp cup piece; the lamp cup piece comprises a light blocking ring arranged around the light source and a condensing lens connected with the light blocking ring.

8. The palm image capture device of any one of claims 1-7, wherein the light panel has a light shield mounted thereon; the light shading piece is arranged around the lens component; the light shading piece is abutted with the cover plate; the light shading piece is provided with a light inlet corresponding to the light transmitting area; one end of the lens assembly, which is far away from the main circuit board, is positioned in the light inlet hole.

9. The palm image acquisition device according to claim 8, wherein a proximity detection sensor is provided on the lamp panel; the light shielding piece is provided with a light emitting outlet and a reflected light inlet corresponding to the proximity detection sensor.

10. The palm image capture device of claim 1, wherein a gap is formed between the lens assembly and the cover plate; a plurality of heat dissipation holes are formed in the frame body.

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