Finger vein device capable of maintaining recognition accuracy

Abstract

The present invention provides a finger vein device capable of maintaining identification accuracy, comprising: a body, the body being provided with a receiving cavity, the receiving cavity having a first opening, and a finger being placed in the receiving cavity through the first opening; a finger vein identification component being provided in the receiving cavity and used for performing finger vein identification on the finger in the receiving cavity; a protective component, the protective component comprising a protective plate, a spring reel, a pull cord and a push-to-unlock structure, the protective plate being movably provided on the body and capable of opening or closing the first opening; the spring reel and the push-to-unlock structure being provided on the body; one end of the protective plate being connected to the spring reel through the pull cord; and the other end of the protective plate being capable of mutually locking with the push-to-unlock structure when moving in a direction away from the first opening. In other words, the finger vein device of the present application can maintain the identification accuracy of the finger vein device.

Description

Technical Field

[0001] The present invention belongs to the technical field of finger vein recognition, and more specifically, relates to a finger vein device capable of maintaining recognition accuracy. Background Art

[0002] Finger vein recognition is a method of obtaining the image features of the veins inside the finger for identity recognition. The blood flowing in the finger veins absorbs infrared light, thus forming an image vein under the irradiation of infrared light. Identity recognition is performed through this image vein. This is a feature that only exists when the body is alive and is difficult to fake. In addition, when using finger veins for identity authentication, it is not necessary to obtain the image features of the finger surface, thus avoiding recognition obstacles caused by the condition of the finger surface or various stains on the surface of the recognition device.

[0003] Then, there are also some problems with finger vein recognition. Since finger vein recognition forms an image vein by irradiating the finger with infrared light, the recognition accuracy of the image vein is particularly important, which affects the success rate of finger vein recognition. However, the scanning frame used to hold the finger is prone to dust after a period of use, which affects the recognition accuracy of the image vein. Summary of the invention

[0004] The present invention aims to provide a finger vein device capable of maintaining recognition accuracy, so as to solve the technical problems mentioned in the above background technology.

[0005] The technical solution adopted by the present invention is a finger vein device capable of maintaining recognition accuracy, comprising:

[0006] A body, wherein the body is provided with a receiving cavity, the receiving cavity has a first opening, and a finger is placed in the receiving cavity through the first opening;

[0007] A finger vein recognition component is disposed in the accommodating cavity and is used to perform finger vein recognition on a finger in the accommodating cavity;

[0008] A protection component, the protection component comprising a protection plate, a spring reel, a pull rope and a push-to-unlock structure, the protection plate being movably disposed on the body and capable of opening or closing the first opening;

[0009] The spring reel and the push-to-unlock structure are arranged on the body;

[0010] One end of the protective plate is connected to the spring reel through the pull rope, and the spring reel enables the pull rope to be reeled up, so that the pull rope drives the protective plate to move toward the first opening to close the first opening;

[0011] The other end of the protective plate can be mutually locked with the push-to-unlock structure when moving in a direction away from the first opening, and when the push-to-unlock structure is pressed, the protective plate and the push-to-unlock structure can be unlocked.

[0012] It can be understood that when the finger vein device is not in use, the spring reel can pull the protective plate toward the direction close to the first opening through the pull rope under the elastic action, and move it to the first opening to close the first opening. When the finger vein device is needed, the user can pull the protective plate toward the direction close to the push-to-unlock structure to open the first opening, and the protective plate and the push-to-unlock structure are mutually locked, so that the protective plate remains in the state of opening the first opening, which is convenient for the user to insert a finger into the accommodating cavity for finger vein recognition. After the recognition is completed, the protective plate and the push-to-unlock structure can be unlocked by pressing the push-to-unlock structure. After unlocking, the protective plate can be pulled toward the direction close to the first opening by the spring reel through the pull rope under the elastic action, and move it to the first opening to close the first opening.

[0013] That is to say, in the finger vein device of the present application, a protective plate that can open or close the first opening of the accommodating chamber is provided on the main body, so that when the finger vein device is not in use, the accommodating chamber can be closed to prevent dust and the like from contaminating the finger vein identification component in the accommodating chamber, so as to maintain the identification accuracy of the finger vein device.

[0014] As a preferred solution of the present invention, guide grooves are respectively provided on the side walls on both sides of the first opening, and the protective plate is arranged in the guide grooves and can move in the vertical direction in the guide grooves;

[0015] A handle is arranged on the protective plate.

[0016] As a preferred embodiment of the present invention, it also includes a limit frame, which is arranged on the main body and has the first opening of the accommodating cavity formed on the limit frame. The first opening extends downward to the side wall of the main body below the accommodating cavity, and the push-to-unlock structure is arranged on the side wall of the main body.

[0017] As a preferred solution of the present invention, the push-to-unlock structure includes an elastic latch and an elastic card block;

[0018] The elastic block is arranged on the side of the protective plate close to the body, a latch hole is arranged in the body, and a second opening is arranged in the latch hole corresponding to the end position where the protective plate moves to open the first opening, and the latch hole extends in the horizontal direction to the side of the body to form a third opening;

[0019] The elastic latch is disposed in the latch hole, and the elastic latch can elastically move in the latch hole; and

[0020] When the protective plate moves to the end position, the elastic block can move into the latch hole through the second opening, and the elastic block can abut against one end of the elastic latch, while the other end of the elastic latch can protrude from the body through the third opening;

[0021] The elastic latch can apply a force to the elastic block to make the elastic block disengage from the latch hole.

[0022] As a preferred solution of the present invention, the elastic clamping block includes a first elastic member and a clamping block, the clamping block is connected to the protective plate through the first elastic member, the first elastic member can enable the clamping block to move toward the direction close to the main body, and when the protective plate moves to the end position, the clamping block moves into the pin hole through the second opening under the action of the first elastic member.

[0023] As a preferred solution of the present invention, a mounting block may be further provided on the side of the protective plate close to the main body, a limiting groove is provided on the side of the mounting block facing the main body, the holding block is arranged in the limiting groove through the first elastic member, and the limiting groove plays a guiding role when the first elastic member causes the holding block to move toward the main body; and

[0024] The main body is provided with an avoidance groove, the avoidance groove extends to the second opening, and the mounting block can move in the avoidance groove.

[0025] As a preferred embodiment of the present invention, the elastic latch comprises a fixing ring, a pressing block, a connecting rod and a pushing block, the fixing ring is fixedly arranged in the latch hole, the connecting rod passes through the fixing ring and can move relative to the fixing ring, a pushing block is provided at one end of the fixing ring close to the second opening, and a pressing block is provided at one end of the fixing ring close to the third opening.

[0026] As a preferred solution of the present invention, the elastic latch further comprises a second elastic member, and the second elastic member is sleeved on the connecting rod between the fixing ring and the push block; and

[0027] The elastic force of the second elastic member is smaller than the elastic force of the first elastic member.

[0028] As a preferred solution of the present invention, the second opening and the third opening may be respectively located on two adjacent side surfaces of the body;

[0029] The push block is provided with a first inclined surface, and the holding block is provided with a second inclined surface matched with the first inclined surface. When the first inclined surface applies pressure to the second inclined surface, the holding block can be separated from the latch hole.

[0030] As a preferred embodiment of the present invention, the finger vein recognition component comprises:

[0031] An infrared lamp body, arranged on the main body above the accommodating cavity;

[0032] A support body, arranged in the accommodating cavity and opposite to the infrared lamp body, and the support body is light-transmissive;

[0033] The image acquisition unit is arranged at one end of the support body away from the infrared lamp body. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 One of the structural schematic diagrams of the finger vein device capable of maintaining recognition accuracy provided by the present invention;

[0036] Figure 2 The second structural schematic diagram of the finger vein device capable of maintaining recognition accuracy provided by the present invention;

[0037] Figure 3 A schematic diagram of the cooperation between the elastic plug and the elastic block in the finger vein device capable of maintaining identification accuracy provided by the present invention;

[0038] Figure 4 A schematic diagram of the structure of an elastic card block in a finger vein device capable of maintaining recognition accuracy provided by the present invention;

[0039] Figure 5 The third structural schematic diagram of the finger vein device capable of maintaining recognition accuracy provided by the present invention;

[0040] Figure 6 for Figure 5 Sectional view at AA in the middle;

[0041] Figure 7 This is a schematic diagram of the structure of the main body of the finger vein device provided by the present invention that can maintain recognition accuracy.

[0042] Reference numerals:

[0043] 100, body; 110, accommodating cavity; 120, guide groove; 130, limiting frame;

[0044] 200, finger vein recognition component; 210, infrared lamp body; 220, support body; 230, image acquisition unit;

[0045] 300, protection component; 310, protection plate; 320, spring reel; 330, pull rope; 340, push-to-unlock structure; 341, elastic latch; 342, elastic clamping block; 343, latch hole; 350, handle; 3411, fixing ring; 3412, pressing block; 3413, connecting rod; 3414, pushing block; 3415, second elastic member; 3416, first inclined surface; 3421, first elastic member; 3422, clamping block; 3423, mounting block; 3424, limiting groove; 3425, avoidance groove; 3426, second inclined surface. Specific embodiments

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or 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 indirectly connected to the other element.

[0048] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of some inventions, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] See also Figures 1 to 7The present invention provides a finger vein device capable of maintaining recognition accuracy, comprising a body 100, a finger vein recognition component 200 and a protection component 300. The body 100 is provided with a receiving chamber 110, the receiving chamber 110 has a first opening, and a finger is placed in the receiving chamber 110 through the first opening. The finger vein recognition component 200 is provided in the receiving chamber 110, and is used to perform finger vein recognition on the finger in the receiving chamber 110. The protection component 300 is provided on the body 100 and is used to open or close the first opening.

[0051] It is understood that when the finger vein device is not working, the first opening can be closed by the protective component 300 to prevent dust and the like from contaminating the finger vein device and maintain recognition accuracy. When the finger vein needs to be recognized, the first opening can be opened by the protective component 300 so that the user's finger can be placed in the accommodating cavity 110.

[0052] Further, the protection assembly 300 includes a protection plate 310, a spring reel 320, a pull rope 330 and a push-unlock structure 340. The protection plate 310 is movably arranged on the body 100 and can open or close the first opening. The spring reel 320 and the push-unlock structure 340 are arranged on the body 100. One end of the protection plate 310 is connected to the spring reel 320 through the pull rope 330, and the spring reel 320 enables the pull rope 330 to be reeled, so that the pull rope 330 drives the protection plate 310 to move in the direction close to the first opening to close the first opening. The other end of the protection plate 310 can be mutually locked with the push-unlock structure 340 when moving in the direction away from the first opening, and when the push-unlock structure 340 is pressed, the protection plate 310 and the push-unlock structure 340 can be unlocked.

[0053] Specifically, when the finger vein device is not in use, the spring reel 320 can pull the protective plate 310 toward the first opening through the pull rope 330 under the elastic action, and move to the first opening to close the first opening. When the finger vein device is needed, the user can pull the protective plate 310 toward the push-unlock structure 340 to open the first opening, and the protective plate 310 and the push-unlock structure 340 are mutually locked, so that the protective plate 310 remains in the state of opening the first opening, which is convenient for the user to insert a finger into the accommodating cavity 110 for finger vein recognition. After the recognition is completed, the push-unlock structure 340 can be pressed to unlock the protective plate 310 and the push-unlock structure 340. After unlocking, the protective plate 310 can be pulled toward the first opening by the pull rope 330 under the elastic action of the spring reel 320, and move to the first opening to close the first opening.

[0054] That is to say, in the finger vein device of the present application, a protective plate 310 that can open or close the first opening of the accommodating chamber 110 is provided on the main body 100, so that when the finger vein device is not in use, the accommodating chamber 110 can be closed to prevent dust and the like from contaminating the finger vein identification component 200 in the accommodating chamber 110, so as to maintain the identification accuracy of the finger vein device.

[0055] Furthermore, in order to facilitate the movement of the protective plate 310 and ensure the accuracy of the movement of the protective plate 310, guide grooves 120 are respectively provided on the side walls on both sides of the first opening. The protective plate 310 is arranged in the guide groove 120 and can move in the guide groove 120 along the vertical direction.

[0056] Furthermore, in order to facilitate the user to move the protective plate 310 to open the first opening, a handle 350 may be provided on the protective plate 310 , and the user may move the protective plate 310 through the handle 350 .

[0057] See also Figures 3 to 6 In some embodiments, in order to facilitate the setting of the push-to-unlock structure 340 on the main body 100 and ensure that the push-to-unlock structure 340 can lock the protective plate 310 at a position where the protective plate 310 can open the first opening, the finger vein device may further include a limit frame 130, which is set on the main body 100, and a first opening of the accommodating cavity 110 is formed on the limit frame 130, and the first opening extends downward to the side wall of the main body 100 below the accommodating cavity 110, and a push-to-unlock structure 340 is set on the side wall of the main body 100.

[0058] It can be understood that when the protective plate 310 moves to the bottom of the first opening, the protective plate 310 can open the first opening, and at the same time, the push-to-unlock structure 340 located below the first opening can lock and fix the protective plate 310.

[0059] Specifically, the push-to-unlock structure 340 may include an elastic latch 341 and an elastic block 342. The elastic block 342 is disposed on the side of the protective plate 310 close to the body 100, and a latch hole 343 is disposed in the body 100, and the latch hole 343 is provided with a second opening corresponding to the end position where the protective plate 310 moves to open the first opening, and the latch hole 343 extends horizontally to the side of the body 100 to form a third opening, and the second opening and the third opening may be respectively located on two adjacent sides of the body 100, or on two opposite sides of the body 100, for example, the second opening may be located on the side of the same body 100 as the first opening, and the third opening may be located on another side adjacent to the above side, or the second opening may be located on the side of the same body 100 as the first opening, and the third opening may be located on another side opposite to the above side. The elastic latch 341 is disposed in the latch hole 343, and the elastic latch 341 may elastically move in the latch hole 343.

[0060] When the protection plate 310 moves to the end position, the elastic block 342 can move into the pin hole 343 through the second opening, and the elastic block 342 can abut against one end of the elastic pin 341, while the other end of the elastic pin 341 can protrude outside the body 100 through the third opening.

[0061] The elastic latch 341 can apply a force to the elastic block 342 to make the elastic block 342 disengage from the latch hole 343 .

[0062] It can be understood that when the elastic block 342 moves into the latch hole 343, the elastic block 342 can be held in the latch hole 343, thereby fixing the protective plate 310 at the end position to keep the first opening open.

[0063] When the first opening needs to be closed, the elastic latch 341 can abut against the elastic block 342 and apply a force to the elastic block 342 so that the elastic block 342 can be separated from the latch hole 343 .

[0064] See also Figure 4 and Figure 6 In some embodiments, the elastic block 342 includes a first elastic member 3421 and a holding block 3422. The holding block 3422 is connected to the protective plate 310 through the first elastic member 3421. The first elastic member 3421 can enable the holding block 3422 to move toward the direction close to the main body 100, and when the protective plate 310 moves to the end position, the holding block 3422 moves into the pin hole 343 through the second opening under the action of the first elastic member 3421.

[0065] It can be understood that in the process of the protective plate 310 moving from the position closing the first opening to the end position, the holding block 3422 can contact the main body 100, so that the first elastic member 3421 always remains in a compressed state. When the protective plate 310 moves to the end position, that is, the holding block 3422 moves to the second opening, the first elastic member 3421 allows the holding block 3422 to be inserted into the pin hole 343 through the second opening.

[0066] Furthermore, in order to ensure the stability of the holding block 3422 in contact with the main body 100 and relative movement when the protective plate 310 moves, a mounting block 3423 may be provided on the side of the protective plate 310 close to the main body 100, and a limiting groove 3424 is provided on the side of the mounting block 3423 facing the main body 100. The holding block 3422 is arranged in the limiting groove 3424 through the first elastic member 3421, and the limiting groove 3424 plays a guiding role when the first elastic member 3421 causes the holding block 3422 to move toward the direction of the main body 100.

[0067] In addition, since the limiting groove 3424 can play a guiding role when the first elastic member 3421 causes the holding block 3422 to move toward the main body 100, the limiting groove 3424 can play a limiting role when the holding block 3422 contacts the main body 100 and can move up and down relative to the main body 100, that is, the first elastic member 3421 can always be kept in a compressed state, and the holding block 3422 can always be located in the limiting groove 3424.

[0068] For further information, see Figure 6 and Figure 7 , an avoidance groove 3425 may be provided on the body 100, the avoidance groove 3425 extends to the second opening, and the mounting block 3423 may move in the avoidance groove 3425. It can be understood that the avoidance groove 3425 can avoid the mounting block 3423 when the protective plate 310 moves up and down, that is, the mounting block 3423 can be hidden in the avoidance groove 3425, making the whole device more integrated.

[0069] See also Figure 2 , Figure 3 , Figure 6 and Figure 7 The elastic latch 341 may include a fixing ring 3411, a pressing block 3412, a connecting rod 3413 and a pushing block 3414. The fixing ring 3411 is fixedly disposed in the latch hole 343, the connecting rod 3413 is passed through the fixing ring 3411 and can move relative to the fixing ring 3411, a pushing block 3414 is disposed at one end of the fixing ring 3411 close to the second opening, and a pressing block 3412 is disposed at one end of the fixing ring 3411 close to the third opening.

[0070] Specifically, when the holding block 3422 is held in the latch hole 343, the holding block 3422 can push the pressing block 3412 provided on the connecting rod 3413 out of the third opening through the pushing block 3414. When the holding block 3422 needs to be removed from the latch hole 343, the pushing block 3414 can push the holding block 3422 out of the latch hole 343 by pressing the pressing block 3412.

[0071] Furthermore, the elastic latch 341 also includes a second elastic member 3415 , which is sleeved on the connecting rod 3413 between the fixing ring 3411 and the pushing block 3414 , and the elastic force of the second elastic member 3415 is smaller than the elastic force of the first elastic member 3421 .

[0072] It can be understood that when the elastic force of the second elastic member 3415 is less than the elastic force of the first elastic member 3421, the first elastic member 3421 can push the pressing block 3412 to the outside of the third opening when the holding block 3422 is inserted into the pin hole 343, making it convenient for subsequent users to apply pressing force to the pressing block 3412.

[0073] Furthermore, in order to facilitate the user to apply pressing force to the pressing block 3412, the second opening and the third opening can be respectively located on two adjacent side surfaces on the main body 100, and a first inclined surface 3416 is provided on the push block 3414, and a second inclined surface 3426 cooperating with the first inclined surface 3416 is provided on the holding block 3422. When the first inclined surface 3416 applies pressure to the second inclined surface 3426, the holding block 3422 can disengage from the pin hole 343.

[0074] It can be understood that the arrangement of the first inclined surface 3416 and the second inclined surface 3426 can realize the conversion of the force, for example, the conversion of the force in the vertical direction.

[0075] See also Figure 6 The finger vein recognition component 200 may include an infrared lamp body 210, a support body 220 and an image acquisition component. The infrared lamp body 210 is disposed on the main body 100 above the accommodating cavity 110, the support body 220 is disposed in the accommodating cavity 110 and is disposed opposite to the infrared lamp body 210, and the support body 220 is light-transmissive. The image acquisition unit 230 is disposed at one end of the support body 220 away from the infrared lamp body 210.

[0076] The support body 220 may be made of transparent glass. The support body 220 can conveniently support the fingers in the accommodating cavity 110 on the one hand, and prevent the user's fingers or external dust from contacting the image acquisition unit 230 on the other hand.

[0077] Specifically, after the infrared lamp body 210 irradiates the finger on the support body 220 with infrared light, the blood in the finger absorbs the near-infrared light, so that the image of the finger vein can be obtained by the image acquisition unit 230. The image acquisition unit 230 can be a camera.

[0078] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of some inventions should be included in the protection scope of some inventions.

Claims

1. A finger vein device capable of maintaining recognition accuracy, characterized in that: include: A body, wherein the body is provided with a receiving cavity, the receiving cavity has a first opening, and a finger is placed in the receiving cavity through the first opening; A finger vein recognition component is disposed in the accommodating cavity and is used to perform finger vein recognition on the finger in the accommodating cavity; A protection component, the protection component comprising a protection plate, a spring reel, a pull rope and a push-to-unlock structure, the protection plate being movably disposed on the body and capable of opening or closing the first opening; The spring reel and the push-to-unlock structure are arranged on the body; One end of the protective plate is connected to the spring reel through the pull rope, and the spring reel enables the pull rope to be reeled up, so that the pull rope drives the protective plate to move toward the first opening to close the first opening; The other end of the protective plate can be mutually locked with the push-to-unlock structure when moving in a direction away from the first opening, and when the push-to-unlock structure is pressed, the protective plate and the push-to-unlock structure can be unlocked.

2. The finger vein device capable of maintaining recognition accuracy as claimed in claim 1, characterized in that: Guide grooves are respectively arranged on the side walls on both sides of the first opening, and the protective plate is arranged in the guide grooves and can move in the vertical direction in the guide grooves; A handle is arranged on the protective plate.

3. The finger vein device capable of maintaining recognition accuracy as claimed in claim 2, characterized in that: It also includes a limit frame, which is arranged on the main body and has the first opening of the accommodating cavity formed on the limit frame. The first opening extends downward to the side wall of the main body below the accommodating cavity, and the push-to-unlock structure is arranged on the side wall of the main body.

4. The finger vein device capable of maintaining recognition accuracy as claimed in claim 1, characterized in that: The push-to-unlock structure includes an elastic latch and an elastic card block; The elastic block is arranged on the side of the protective plate close to the body, a latch hole is arranged in the body, and a second opening is arranged in the latch hole corresponding to the end position where the protective plate moves to open the first opening, and the latch hole extends in the horizontal direction to the side of the body to form a third opening; The elastic latch is disposed in the latch hole, and the elastic latch can elastically move in the latch hole; and When the protective plate moves to the end position, the elastic block can move into the latch hole through the second opening, and the elastic block can abut against one end of the elastic latch, while the other end of the elastic latch can protrude from the body through the third opening; The elastic latch can apply a force to the elastic block to make the elastic block disengage from the latch hole.

5. The finger vein device capable of maintaining recognition accuracy as claimed in claim 4, characterized in that: The elastic clamping block includes a first elastic member and a clamping block, the clamping block is connected to the protective plate through the first elastic member, the first elastic member can enable the clamping block to move toward the direction close to the body, and when the protective plate moves to the end position, the clamping block moves into the pin hole through the second opening under the action of the first elastic member.

6. The finger vein device capable of maintaining recognition accuracy as claimed in claim 5, characterized in that: A mounting block may be further provided on the side of the protective plate close to the main body, a limiting groove is provided on the side of the mounting block facing the main body, the holding block is arranged in the limiting groove through the first elastic member, and the limiting groove plays a guiding role when the first elastic member moves the holding block toward the main body; and The main body is provided with an avoidance groove, the avoidance groove extends to the second opening, and the mounting block can move in the avoidance groove.

7. The finger vein device capable of maintaining recognition accuracy as claimed in claim 6, characterized in that: The elastic latch comprises a fixing ring, a pressing block, a connecting rod and a pushing block. The fixing ring is fixedly arranged in the latch hole. The connecting rod passes through the fixing ring and can move relative to the fixing ring. A pushing block is provided at one end of the fixing ring close to the second opening. A pressing block is provided at one end of the fixing ring close to the third opening.

8. The finger vein device capable of maintaining recognition accuracy as claimed in claim 7, characterized in that: The elastic latch further comprises a second elastic member, wherein the second elastic member is sleeved on the connecting rod between the fixing ring and the push block; and The elastic force of the second elastic member is smaller than the elastic force of the first elastic member.

9. The finger vein device capable of maintaining recognition accuracy as claimed in claim 8, characterized in that: The second opening and the third opening may be respectively located on two adjacent side surfaces of the body; The push block is provided with a first inclined surface, and the holding block is provided with a second inclined surface matched with the first inclined surface. When the first inclined surface applies pressure to the second inclined surface, the holding block can be separated from the latch hole.

10. The finger vein device capable of maintaining recognition accuracy according to any one of claims 1 to 9, characterized in that: The finger vein recognition component comprises: An infrared lamp body, arranged on the main body above the accommodating cavity; A support body, arranged in the accommodating cavity and opposite to the infrared lamp body, and the support body is light-transmissive; The image acquisition unit is arranged at one end of the support body away from the infrared lamp body.

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