Safety device for lancet

Abstract

The utility model belongs to the field of medical instrument, specifically is the oblique back spring type safety protection device of blood taking needle, including casing and blood taking tube, the inside rotation of casing is installed with cylinder, the cylinder is used in cooperation with blood taking tube, one end of cylinder is fixedly connected with sleeve, the top of sleeve penetrates casing and is rotatably connected with casing, the inside fixed mounting of sleeve has first spring, one end of first spring is fixedly connected with pressure plate, the top fixed mounting of pressure plate has clamping block, through setting release mechanism, can play the role of locking cylinder, avoids the situation that cylinder appears accidental rotation to lead to clamping block and card slot separate, thereby avoids the normal use of protection structure is affected, and when using, through release mechanism can separate clamping block and card slot, to make first spring drive pressure plate remove, and pressure plate drives needle head to remove to lead to needle head to go in the inside of casing.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically a wedge-shaped spring-loaded safety protection device for blood collection needles. Background Technology

[0002] The wedge-shaped spring-loaded safety protection device is a breakthrough safety design in the field of blood collection needles. Its core principle is to achieve automatic retraction and sealing of the needle after blood collection through the mechanical properties of the wedge structure. Through mechanical innovation and detailed optimization, the wedge-shaped spring-loaded safety protection device redefines the safety standards of the blood collection process. Its clinical value and socio-economic benefits are significant, and it is expected to become a standard technology in the next generation of blood collection equipment.

[0003] Although the existing wedge-shaped spring-loaded safety protection device for blood collection needles can effectively improve blood collection safety, in actual use, during transportation or storage, unexpected pressure may cause the spring-loaded structure to be accidentally triggered, resulting in the needle tip retracting and closing prematurely, thus affecting the normal use of the wedge-shaped spring-loaded safety protection device for blood collection needles; therefore, a wedge-shaped spring-loaded safety protection device for blood collection needles is proposed to address the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the existing wedge-shaped spring-loaded safety protection device for blood collection needles may be accidentally triggered by unexpected pressure during transportation or storage, causing the needle to retract and close prematurely, thus affecting the normal use of the wedge-shaped spring-loaded safety protection device. This invention proposes a wedge-shaped spring-loaded safety protection device for blood collection needles.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a wedge-shaped rebound safety protection device for blood collection needles, including a housing and a blood collection tube. A cylinder is rotatably installed inside the housing. The cylinder is used in conjunction with the blood collection tube. A sleeve is fixedly connected to one end of the cylinder. The top of the sleeve passes through the housing and is rotatably connected to the housing. A first spring is fixedly installed inside the sleeve. A pressure plate is fixedly connected to one end of the first spring. A locking block is fixedly installed on the top of the pressure plate. A locking groove is opened on the surface of the cylinder. The locking block is slidably connected inside the locking block. A protective sleeve passes through the inside of the pressure plate. One end of the protective sleeve passes through the sleeve and is slidably connected to the sleeve. A needle passes through the inside of the protective sleeve. A release mechanism is provided inside the housing. The release mechanism is used in conjunction with the cylinder. A bottom cover is threadedly connected to the bottom of the housing. The bottom cover is used in conjunction with the blood collection tube.

[0006] The release mechanism includes a movable frame slidably connected inside the housing. A bracket is fixedly installed on the surface of the movable frame. A second spring is fixedly installed inside the bracket. A wedge block is fixedly connected to one end of the second spring. A circular protrusion is fixedly installed on the surface of the cylinder. The wedge block and the circular protrusion cooperate with each other. A support assembly is fixedly installed inside the housing. The support assembly cooperates with the movable frame.

[0007] Preferably, a positioning block is fixedly installed on the surface of the sleeve, and a first positioning groove is formed on the inner wall of the housing, with the surface of the positioning block slidably connected to the inner cavity of the first positioning groove.

[0008] Preferably, a slider is fixedly installed on the surface of the movable frame, and a slide rail is fixedly installed on the inner wall of the housing, with the inner cavity of the slide rail slidably connected to the surface of the slider.

[0009] Preferably, a first positioning rod is fixedly connected to the bottom of the wedge block, the surface of the first positioning rod is slidably connected to the inner cavity of the second spring, and one end of the first positioning rod passes through the bracket and is slidably connected to the bracket.

[0010] Preferably, the support assembly includes a third spring fixedly connected inside the housing, one end of the third spring being fixedly connected to a stop block, the bottom of the stop block extending into the inside of the slot and slidably connected to the slot.

[0011] Preferably, a second positioning rod is fixedly connected to the surface of the stop block, the surface of the second positioning rod is slidably connected to the inner cavity of the third spring, a second positioning groove is provided on the inner wall of the housing, and one end of the second positioning rod is slidably connected to the inside of the second positioning groove.

[0012] Preferably, the bottom cover is slidably fitted with a threaded sleeve, the surface of which is threadedly connected to the inner cavity of the housing. A limit frame is fixedly installed on the inner wall of the threaded sleeve, and a limit block is fixedly installed on the surface of the bottom cover. The surface of the limit block is slidably connected to the inner cavity of the limit frame. An elastic layer is fixedly installed inside the bottom cover, and the surface of the elastic layer is in contact with the bottom of the blood collection tube.

[0013] The advantages of this utility model are:

[0014] 1. This utility model, by setting a release mechanism, can lock the cylinder body, preventing the cylinder body from rotating unexpectedly and causing the locking block to separate from the locking groove, thereby avoiding affecting the normal use of the protective structure. In use, the locking block can be separated from the locking groove by the release mechanism, so that the first spring drives the pressure plate to move, and the pressure plate drives the needle to move through the protective sleeve, thereby retracting the needle into the housing.

[0015] 2. This utility model sets up a support component, which locks the cylinder. The lower end of the stop block extends into the slot, thereby limiting the cylinder and preventing accidental rotation. When the moving frame pushes the stop block, the stop block can be separated from the slot, and the support component no longer locks the position of the cylinder, so that the cylinder can rotate to retract the needle. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the inclined wedge spring-loaded safety protection device for the blood collection needle of this utility model.

[0018] Figure 2 This is a schematic diagram of the release mechanism structure of this utility model;

[0019] Figure 3 This utility model Figure 2 A schematic diagram of the cross-sectional structure;

[0020] Figure 4 This is a schematic diagram of the support component structure of this utility model.

[0021] In the diagram: 1. Shell; 2. Cylinder; 21. Sleeve; 2101. Positioning block; 2102. First positioning groove; 22. First spring; 23. Pressure plate; 24. Locking block; 25. Locking groove; 26. Sheath; 3. Needle; 4. Release mechanism; 41. Moving frame; 4101. Slider; 4102. Slide rail; 42. Bracket; 4201. First positioning rod; 43. Second spring; 44. Wedge block; 45. Circular protrusion; 46. Support assembly; 4601. Third spring; 4602. Stop block; 4603. Second positioning rod; 4604. Second positioning groove; 5. Blood collection tube; 6. Bottom cover; 61. Threaded sleeve; 62. Elastic layer; 63. Limiting block; 64. Limiting frame. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0024] This application discloses a wedge-shaped spring-loaded safety protection device for blood collection needles. (Refer to...) Figure 2 and Figure 4 The inclined wedge rebound safety protection device for blood collection needle includes a housing 1 and a blood collection tube 5. A cylinder 2 is rotatably installed inside the housing 1. The cylinder 2 is used in conjunction with the blood collection tube 5. A sleeve 21 is fixedly connected to one end of the cylinder 2. The top of the sleeve 21 passes through the housing 1 and is rotatably connected to the housing 1. A first spring 22 is fixedly installed inside the sleeve 21. A pressure plate 23 is fixedly connected to one end of the first spring 22. A locking block 24 is fixedly installed on the top of the pressure plate 23. A locking groove 25 is opened on the surface of the cylinder 2. The locking block 24 is slidably connected inside the locking block 24. A protective sleeve 26 passes through the inside of the pressure plate 23. One end of the protective sleeve 26 passes through the sleeve 21 and is slidably connected to the sleeve 21. A needle 3 passes through the inside of the protective sleeve 26. A release mechanism 4 is provided inside the housing 1. The release mechanism 4 is used in conjunction with the cylinder 2. A bottom cover 6 is threadedly connected to the bottom of the housing 1. The bottom cover 6 is used in conjunction with the blood collection tube 5.

[0025] The release mechanism 4 includes a movable frame 41 slidably connected inside the housing 1. A bracket 42 is fixedly mounted on the surface of the movable frame 41, and a second spring 43 is fixedly mounted inside the bracket 42. One end of the second spring 43 is fixedly connected to a wedge block 44. A circular protrusion 45 is fixedly mounted on the surface of the cylinder 2, and the wedge block 44 cooperates with the circular protrusion 45. A support assembly 46 is fixedly mounted inside the housing 1, and the support assembly 46 cooperates with the movable frame 41. During the transportation and storage of the housing 1, the support assembly 46 can lock the cylinder 2 to prevent accidental rotation of the cylinder 2. When it is necessary to retract the needle 3 into the housing 1... Pushing the bottom cover 6 causes the moving frame 41 to move, which in turn pushes the support assembly 46, causing it to separate from the slot 25. This allows the support assembly 46 to no longer restrict the position of the cylinder 2. When the support assembly 46 separates from the slot 25, the second spring 43 exerts a pushing force on the wedge block 44, causing the wedge block 44 to push the circular protrusion 45, thus rotating the cylinder 2. This causes the locking block 24 to slide to a wider position in the slot 25, so that the slot 25 no longer restricts the position of the locking block 24. This allows the locking block 24 to no longer support the position of the pressure plate 23, causing the first spring 22 to move the pressure plate 23, thereby retracting the needle 3 into the interior of the housing 1.

[0026] Reference Figure 1 and Figure 4A positioning block 2101 is fixedly installed on the surface of the sleeve 21, and a first positioning groove 2102 is provided on the inner wall of the housing 1. The surface of the positioning block 2101 is slidably connected to the inner cavity of the first positioning groove 2102. The position of the sleeve 21 is stabilized by the slidable connection between the inner cavity of the first positioning groove 2102 and the surface of the positioning block 2101, so as to avoid displacement of the sleeve 21 and the cylinder 2 and affect the position of the needle 3.

[0027] Reference Figure 3 and Figure 4 A slider 4101 is fixedly installed on the surface of the movable frame 41, and a slide rail 4102 is fixedly installed on the inner wall of the housing 1. The inner cavity of the slide rail 4102 is slidably connected to the surface of the slider 4101. By making the surface of the slider 4101 slidably connected to the inner cavity of the slide rail 4102, the position of the movable frame 41 is stabilized, and the movable frame 41 is prevented from rotating, which would affect normal use.

[0028] Reference Figure 2 and Figure 3 The bottom of the wedge block 44 is fixedly connected to a first positioning rod 4201. The surface of the first positioning rod 4201 is slidably connected to the inner cavity of the second spring 43. One end of the first positioning rod 4201 passes through the bracket 42 and is slidably connected to the bracket 42. The first positioning rod 4201 can effectively stabilize the position of the second spring 43 and prevent the second spring 43 from twisting, shifting or other situations that would affect the position of the wedge block 44.

[0029] Reference Figure 1 and Figure 4 The support assembly 46 includes a third spring 4601 fixedly connected inside the housing 1. One end of the third spring 4601 is fixedly connected to a stop 4602. The bottom of the stop 4602 extends into the inside of the slot 25 and is slidably connected to the slot 25. The third spring 4601 supports the position of the stop 4602 so that the bottom of the stop 4602 is engaged inside the slot 25, thereby stabilizing the position of the cylinder 2.

[0030] Reference Figure 1 and Figure 4 A second positioning rod 4603 is fixedly connected to the surface of the stop block 4602. The surface of the second positioning rod 4603 is slidably connected to the inner cavity of the third spring 4601. A second positioning groove 4604 is provided on the inner wall of the housing 1. One end of the second positioning rod 4603 is slidably connected to the inside of the second positioning groove 4604. By making one end of the second positioning rod 4603 slidably connected to the inside of the second positioning groove 4604, the second positioning rod 4603 plays the role of stabilizing the position of the third spring 4601 and the stop block 4602, and preventing the stop block 4602 from shifting and affecting the position of the cylinder 2.

[0031] Reference Figure 1 and Figure 4A threaded sleeve 61 is slidably fitted on the surface of the bottom cover 6. The surface of the threaded sleeve 61 is threadedly connected to the inner cavity of the housing 1. A limit frame 64 is fixedly installed on the inner wall of the threaded sleeve 61. A limit block 63 is fixedly installed on the surface of the bottom cover 6. The surface of the limit block 63 is slidably connected to the inner cavity of the limit frame 64. An elastic layer 62 is fixedly installed inside the bottom cover 6. The surface of the elastic layer 62 is in contact with the bottom of the blood collection tube 5. The threaded sleeve 61 can connect the bottom cover 6 to the housing 1, and the elastic layer 62 can support the blood collection tube 5. At the same time, the blood collection tube 5 exerts pressure on the bottom cover 6 through the elastic layer 62 to prevent the bottom cover 6 from moving accidentally and causing the moving frame 41 to move. Meanwhile, the limit frame 64 and the limit block 63 can prevent the bottom cover 6 from separating from the threaded sleeve 61 and will not affect the normal movement of the bottom cover 6.

[0032] Working principle: During the transportation and storage of the housing 1, one end of the second positioning rod 4603 is slidably connected to the inside of the second positioning groove 4604 to stabilize the position of the third spring 4601 and the stop block 4602, so that the stop block 4602 is engaged inside the groove 25, thereby the support component 46 plays the role of locking the cylinder 2 and preventing the cylinder 2 from rotating accidentally. When blood collection is required, the blood collection tube 5 is inserted into the cylinder 2, and one end of the needle 3 is inserted into the blood collection tube 5. Then, the threaded sleeve 61 is threaded into the bottom cover 6 to complete the installation of the bottom cover 6. The elastic layer 62 can support the blood collection tube 5. At the same time, the blood collection tube 5 exerts pressure on the bottom cover 6 through the elastic layer 62 to prevent the bottom cover 6 from moving accidentally and causing the moving frame 41 to move. At the same time, the limiting frame 64 and the limiting block 63 can prevent the bottom cover 6 from separating from the threaded sleeve 61 and will not affect the normal movement of the bottom cover 6. When it is necessary to put the needle 3 back into the housing 1, the bottom cover 6 is pushed, and the bottom cover 6 plays the role of pushing the moving frame 41. The moving frame 41 is stabilized by sliding the surface of the limiting block 63 into the inner cavity of the limiting frame 64, thus preventing the moving frame 41 from shifting. The moving frame 41 pushes the stop block 4602, causing the stop block 4602 to separate from the slot 25. After the stop block 4602 separates from the slot 25, the wedge block 44 pushes the circular protrusion 45 through the support of the second spring 43, and the position of the wedge block 44 is stabilized by the first positioning rod 4201 to prevent the position of the wedge block 44 from shifting. This causes the cylinder 2 to rotate and slides through the surface of the positioning block 2101 to the inner cavity of the first positioning groove 2102, thereby stabilizing the position of the sleeve 21 and the cylinder 2. This allows the locking block 24 to slide to a wider position in the locking groove 25, so that the locking groove 25 no longer restricts the position of the locking block 24. This allows the locking block 24 to no longer support the position of the pressure plate 23, causing the first spring 22 to drive the pressure plate 23 to move. The pressure plate 23 then drives the sheath 26 to move, and the sheath 26 drives the needle 3 to move, thereby retracting the needle 3 into the interior of the housing 1.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A wedge-shaped spring-loaded safety protection device for blood collection needles, characterized in that: The device includes a housing (1) and a blood collection tube (5). A cylindrical body (2) is rotatably mounted inside the housing (1). The cylindrical body (2) is used in conjunction with the blood collection tube (5). One end of the cylindrical body (2) is fixedly connected to a sleeve (21). The top of the sleeve (21) penetrates the housing (1) and is rotatably connected to it. A first spring (22) is fixedly mounted inside the sleeve (21). One end of the first spring (22) is fixedly connected to a pressure plate (23). A locking block (24) is fixedly mounted on the top of the pressure plate (23). The cylindrical body (2)... The surface is provided with a slot (25), the card block (24) is slidably connected to the inside of the card block (24), the inside of the pressure plate (23) is provided with a protective sleeve (26), one end of the protective sleeve (26) is connected to the sleeve (21) and is slidably connected to the sleeve (21), the inside of the protective sleeve (26) is provided with a needle (3), the inside of the housing (1) is provided with a release mechanism (4), the release mechanism (4) is used in conjunction with the cylinder (2), the bottom of the housing (1) is threadedly connected with a bottom cover (6), the bottom cover (6) is used in conjunction with the blood collection tube (5); The release mechanism (4) includes a movable frame (41) slidably connected inside the housing (1). A bracket (42) is fixedly installed on the surface of the movable frame (41). A second spring (43) is fixedly installed inside the bracket (42). A wedge block (44) is fixedly connected to one end of the second spring (43). A circular protrusion (45) is fixedly installed on the surface of the cylinder (2). The wedge block (44) and the circular protrusion (45) cooperate with each other. A support assembly (46) is fixedly installed inside the housing (1). The support assembly (46) cooperates with the movable frame (41).

2. The inclined wedge-shaped rebound safety protection device for blood collection needles according to claim 1, characterized in that: A positioning block (2101) is fixedly installed on the surface of the sleeve (21), and a first positioning groove (2102) is opened on the inner wall of the housing (1). The surface of the positioning block (2101) is slidably connected to the inner cavity of the first positioning groove (2102).

3. The inclined wedge-shaped spring-loaded safety protection device for blood collection needles according to claim 1, characterized in that: A slider (4101) is fixedly installed on the surface of the movable frame (41), and a slide rail (4102) is fixedly installed on the inner wall of the housing (1). The inner cavity of the slide rail (4102) is slidably connected to the surface of the slider (4101).

4. The inclined wedge-shaped spring-loaded safety protection device for blood collection needles according to claim 1, characterized in that: The bottom of the wedge block (44) is fixedly connected to a first positioning rod (4201). The surface of the first positioning rod (4201) is slidably connected to the inner cavity of the second spring (43). One end of the first positioning rod (4201) passes through the bracket (42) and is slidably connected to the bracket (42).

5. The inclined wedge-shaped spring-loaded safety protection device for blood collection needles according to claim 1, characterized in that: The support assembly (46) includes a third spring (4601) fixedly connected inside the housing (1), one end of the third spring (4601) is fixedly connected to a stop (4602), and the bottom of the stop (4602) extends into the inside of the slot (25) and is slidably connected to the slot (25).

6. The inclined wedge-shaped spring-loaded safety protection device for blood collection needles according to claim 5, characterized in that: The surface of the stop (4602) is fixedly connected to a second positioning rod (4603), the surface of the second positioning rod (4603) is slidably connected to the inner cavity of the third spring (4601), and a second positioning groove (4604) is opened on the inner wall of the housing (1), and one end of the second positioning rod (4603) is slidably connected to the inside of the second positioning groove (4604).

7. The inclined wedge-shaped rebound safety protection device for blood collection needles according to claim 1, characterized in that: The bottom cover (6) is slidably fitted with a threaded sleeve (61), the surface of the threaded sleeve (61) is threadedly connected to the inner cavity of the housing (1), a limit frame (64) is fixedly installed on the inner wall of the threaded sleeve (61), a limit block (63) is fixedly installed on the surface of the bottom cover (6), the surface of the limit block (63) is slidably connected to the inner cavity of the limit frame (64), an elastic layer (62) is fixedly installed inside the bottom cover (6), and the surface of the elastic layer (62) is in contact with the bottom of the blood collection tube (5).

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