A syringe holder and a puncture device

Abstract

The present invention relates to a syringe holder and a puncture device. The syringe holder is used for being mounted on a syringe. The syringe holder includes: a fixing member extending along a first direction, the fixing member having a first cavity and a handheld portion, the barrel of the syringe being inserted into the first cavity of the fixing member and fixedly connected to the fixing member, at least a part of the piston of the syringe being located in the first cavity of the fixing member; a sliding member disposed on the fixing member and capable of sliding relative to the fixing member along the first direction, the sliding member having a connecting portion for connecting to the piston in the barrel and capable of driving the piston to move along the first direction in the first cavity of the fixing member. After the syringe holder of the present invention is mounted on the syringe, during the puncture aspiration examination by the operator, the aspiration action is convenient and the puncture is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of syringes, and particularly to a syringe holder and a puncture device. Background Art

[0002] Thyroid diseases are common diseases in the field of endocrinology. There are many methods for diagnosing thyroid diseases in the medical community, but they all have limitations to varying degrees. Due to its high accuracy and cost-effectiveness, thyroid puncture has been widely used in clinical treatment and is an important method for preoperative diagnosis of thyroid diseases. Thyroid fine needle aspiration biopsy eliminates unnecessary surgeries for patients and greatly reduces the morbidity and mortality rates after surgery for patients. During puncture, the patient lies flat on the back, with the neck elevated to fully expose the thyroid gland. After disinfection, the operator uses one hand to fix the thyroid gland or thyroid nodule on the puncture side with the index finger and middle finger, and holds a syringe with the other hand. There is 1-2 ml of air left in the syringe barrel. The puncture needle quickly penetrates through the skin into the thyroid gland (or nodule), a little negative pressure is drawn with the syringe, and then the needle is punctured back and forth 2-3 times in different directions, the negative pressure is quickly released, the needle is withdrawn, and the puncture site is compressed with a cotton ball for a few minutes. The aspirated material is injected onto a glass slide, evenly spread, and after the smear dries, it is fixed with 95% alcohol and then sent for inspection.

[0003] The current puncture aspiration biopsies of the thyroid, lymph nodes, breast and other parts use ordinary syringes. During the puncture process, the doctor needs to use one hand to complete the aspiration action of the syringe and ensure the accuracy and stability of the puncture. The operation is very inconvenient and often causes problems such as unstable aspiration action and puncture deviation. Summary of the Invention

[0004] The problem solved by the present invention is that the aspiration action is inconvenient and the puncture is unstable when the existing puncture device performs puncture aspiration examination.

[0005] To solve the above problems, the purpose of the present invention is to provide a syringe holder for mounting on a syringe, including: a fixing member extending along a first direction, the fixing member having a first cavity and a hand-held portion, the syringe barrel being inserted into the first cavity of the fixing member and fixedly connected to the fixing member, at least part of the piston of the syringe being located in the first cavity of the fixing member; a sliding member provided on the fixing member and capable of sliding relative to the fixing member along the first direction, the sliding member having a connecting portion for connecting to the piston in the syringe barrel and capable of driving the piston to move along the first direction in the first cavity of the fixing member.

[0006] Optionally, the hand-held portion is the first force application point, along the first direction, the end of the fixing member away from the syringe barrel is the second force application point, and the sliding member is the third force application point.

[0007] Optionally, the fixing member is provided with a first opening extending along the first direction, the first opening exposes the piston, and the connecting portion is arranged toward the first opening.

[0008] Optionally, the sliding member is provided with a paddle for driving the sliding member to slide relative to the fixing member along the first direction.

[0009] Optionally, the paddle is provided on a side of the sliding member facing away from the fixing member, and along the first direction, one end of the paddle is a first paddle portion, and the other end is a second paddle portion.

[0010] Optionally, the paddle has an opening.

[0011] Optionally, the hand-held portion is provided on a side of the fixing member facing away from the sliding member.

[0012] Optionally, the shape of the handheld portion includes a ring shape, an arc shape or a rectangle shape.

[0013] Optionally, along the first direction, the sliding member has a first paddle and a second paddle that are sequentially spaced apart.

[0014] Optionally, a gear member is provided on the movement path of the sliding member to remind the syringe of the aspiration amount or injection amount.

[0015] Optionally, the shift member includes at least one first shift member provided on the sliding member and at least one second shift member provided on the fixed member. Along the first direction, the stroke of the first shift member moving to counteract the second shift member is a preset value, and the preset value corresponds to the suction volume or injection volume of the syringe. When the first shift member moves to counteract the second shift member, under the action of external force, the sliding member can continue to move in the first direction relative to the fixed member.

[0016] Optionally, along the circumferential direction, the sliding member has a first end and a second end, and at least one of the first end and the second end of the sliding member is provided with the first shift member; and the second shift member is provided on a portion of the fixing member corresponding to the end of the sliding member on which the first shift member is installed.

[0017] Optionally, a cross-section of a contact surface where the sliding member fits against an outer surface of the fixing member is an arc-shaped surface.

[0018] Optionally, the arc surface is a major arc surface.

[0019] The present invention also provides a trocar, comprising: a syringe, the syringe comprising: a barrel extending along a first direction and having a second cavity, the barrel being configured to be provided with a puncture needle communicating with the second cavity; a piston having a first end and a second end along the first direction, the first end being disposed within the second cavity; the syringe holder according to any one of the above, the barrel being inserted into the first cavity of the fixing member and fixedly connected to the fixing member, the second end of the piston extending out of the second cavity and being located within the first cavity of the fixing member and connected to the connecting portion.

[0020] Optionally, the fixing member is provided with a first opening extending along the first direction, the first opening exposing the second end of the piston, and the connecting portion is disposed facing the first opening.

[0021] As described above, the present invention provides a syringe holder, comprising: a fixing member extending along a first direction, the fixing member having a first cavity and a handheld portion, the barrel of the syringe being inserted into the first cavity of the fixing member and fixedly connected to the fixing member, at least a part of the piston of the syringe being located within the first cavity of the fixing member; and a sliding member disposed on the fixing member and capable of sliding relative to the fixing member along the first direction, the sliding member having a connecting portion for connecting to the piston within the barrel and capable of driving the piston to move along the first direction within the first cavity of the fixing member. When the fingers of one hand push the sliding member forward (away from the palm direction), the piston is driven to move forward to perform an injection action; when the fingers of one hand push the sliding member backward (towards the palm direction), the piston is driven to move forward to perform an injection action.

[0022] During this process, the fixing member and the barrel remain stationary, which can keep the puncture needle inserted into the cell tissue stationary. When the trocar performs a suction action and an injection action, the sliding member moves relative to the fixing member along the first direction, and the piston moves along the first direction within the fixing member and the barrel, without affecting the fixing member. That is, during the puncture process by the operator, some fingers and the palm of one hand hold the trocar, so that the fixing member and the barrel remain stationary, and the remaining fingers of one hand independently operate the movement of the sliding member. Thus, the operator can operate the trocar of the present invention with one hand to achieve a suction action or an injection action, without mutual interference, which is convenient for the suction action during a puncture aspiration examination, and the trocar is stable during puncture.

[0023] After installing the syringe holder of the present invention on the syringe, in the initial state, the piston is at the bottom of the syringe barrel. The fingers of the operator's single hand hold the handheld part, and the palm of the hand abuts against the end of the fixing part away from the syringe barrel, so that the fixing part and the syringe barrel remain stationary. First, operate to move the piston backward to have 1-2 ml of air in the syringe barrel; then operate to insert the puncture device into the human tissue, and keep the puncture needle inserted into the cell tissue stationary; then operate to move the piston backward (in the direction of the palm of the hand) to create a certain negative pressure in the syringe barrel, and the cell tissue will be aspirated out; after seeing the cell tissue being aspirated out, pull it out from the human tissue; drop the aspirated cell tissue onto the glass slide, spread it evenly, and send it for inspection after air-drying and fixing with 95% alcohol.

[0024] To make the above content of the present invention more obvious and understandable, the following specifically gives preferred embodiments and detailed descriptions in conjunction with the accompanying drawings. Brief Description of the Drawings

[0025] Figure 1 is a three-dimensional view of the puncture device in the embodiment of the present invention Figure 1 ;

[0026] Figure 2 is a three-dimensional view of the puncture device in the embodiment of the present invention Figure 2 ;

[0027] Figure 3 is a three-dimensional view of the puncture device in the embodiment of the present invention Figure 3 ;

[0028] Figure 4 is a sectional view of the puncture device in the embodiment of the present invention Figure 1 ;

[0029] Figure 5 is a sectional view of the puncture device in the embodiment of the present invention Figure 2 ;

[0030] Figure 6 is a three-dimensional view of the puncture device in the embodiment of the present invention Figure 4 ;

[0031] Figure 7 is a three-dimensional view of the fixing part in the syringe holder of the embodiment of the present invention;

[0032] Figure 8 is a side view of the fixing part in the syringe holder of the embodiment of the present invention;

[0033] Figure 9 is a three-dimensional view of the sliding part in the syringe holder of the embodiment of the present invention Figure 1 ;

[0034] Figure 10 is a top view of the sliding part in the syringe holder of the embodiment of the present invention;

[0035] Figure 11is a three-dimensional view of the sliding member in the syringe holder according to an embodiment of the present invention Figure 2 ;

[0036] Figure 12 is a three-dimensional view of the syringe holder according to an embodiment of the present invention;

[0037] Figure 13 is a three-dimensional view of the puncture device according to an embodiment of the present invention Figure 5 ;

[0038] Figure 14 is a three-dimensional view of the puncture device according to an embodiment of the present invention Figure 6 ;

[0039] Figure 15 is a three-dimensional view of the sliding member in the syringe holder according to an embodiment of the present invention Figure 3 ;

[0040] Figure 16 is a side view of the puncture device according to an embodiment of the present invention;

[0041] Figure 17 is a three-dimensional view of the puncture device according to an embodiment of the present invention Figure 7 . Detailed implementation manners

[0042] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this implementation manner. On the contrary, the purpose of introducing the invention in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0043] Referring to Figure 1 and Figure 4 , the present invention provides a puncture device 1. In this embodiment, the puncture device 1 includes: a syringe and a syringe holder mounted on the syringe. Among them, the syringe includes: a barrel 10 and a piston 30. The syringe holder includes a fixing member 20 and a sliding member 40. The barrel 10 extends along a first direction ( Figure 1 and Figure 2 the X direction shown in), the barrel 10 has a second cavity 11, and the front end 1a of the barrel 10 is used to set a puncture needle (not shown in the figure) communicating with the second cavity 11. The puncture needle is used to puncture cell tissue for cell biopsy, such as puncturing cell tissue in parts such as the thyroid gland, lymph nodes, and breast.

[0044] The fixing member 20 extends along a first direction. The fixing member 20 has a first cavity 23 and a hand-held portion 21. The syringe 10 is inserted into the first cavity 23 and fixedly connected to the fixing member 20. The hand-held portion 21 is for an operator to hold the puncture device 1.

[0045] Reference Figure 4 , the piston 30 has a first end 31 and a second end 32 along the first direction. The piston 30 is at least partially located in the first cavity 23 of the fixing member 20. In this embodiment, the first end 31 of the piston 30 is disposed in the second cavity 11, and the second end 32 extends out of the second cavity 11 and is located in the first cavity 23. The outer contour of the first end 31 of the piston 30 fits the inner peripheral surface of the second cavity 11. The sliding member 40 is disposed on the fixing member 20 and can slide relative to the fixing member 20 along the first direction. The sliding member 40 has a connecting portion 43, and the connecting portion 43 is used to connect with the piston 30 in the syringe 10. In this embodiment, the connecting portion 43 is connected to the second end 32 of the piston 30. When the sliding member 40 slides relative to the fixing member 20 along the first direction, it can drive the piston 30 to move in the second cavity 11 of the syringe 10 and in the first cavity 23 of the fixing member 20.

[0046] When the fingers of one hand push the sliding member 40 forward (away from the palm direction), it drives the piston 30 to move forward to perform an injection action; when the fingers of one hand push the sliding member 40 backward (toward the palm direction), it drives the piston 30 to move backward to perform a suction action.

[0047] During this process, the fixing member 20 and the syringe 10 remain stationary, which can keep the puncture needle inserted into the cell tissue stationary. When the puncture device 1 performs a suction action and an injection action, the sliding member 40 moves relative to the fixing member 20 along the first direction, and the piston 30 moves along the first direction in the fixing member 20 and the syringe 10, without affecting the fixing member 20. That is, during the puncture process of the operator, some fingers and the palm of one hand hold the puncture device 1 to keep the fixing member 20 and the syringe 10 stationary, and the remaining fingers of one hand independently operate the sliding member 40 to move. Thus, the operator can operate the puncture device 1 of the present invention with one hand to achieve a suction action or an injection action without mutual interference, which is convenient for the suction action during a puncture aspiration examination, and the puncture device 1 has stable puncture.

[0048] After the syringe holder of the present invention is installed on the syringe, in the initial state, the piston 30 is at the bottom of the syringe 10, and the operator holds the hand-held part with one hand, and the palm of the hand is against the end of the fixing member 20 away from the syringe 10, so that the fixing member 20 and the syringe 10 remain motionless. First, the piston 30 is operated to move backward, so that there is 1-2 ml of air in the syringe 10; then the puncture device 1 is operated to insert the human tissue, and the puncture needle is inserted into the cell tissue and remains motionless; then the piston 30 is operated to move backward (toward the palm of the hand), so that there is a certain negative pressure in the syringe 10, and the cell tissue will be sucked out; after seeing the cell tissue being sucked out, pull it out from the human tissue; drip the sucked cell tissue onto a slide, spread it evenly, and fix the smear with 95% alcohol after it is dried and send it for inspection.

[0049] Continue to refer Figures 1 to 4 The sliding member 40 of the present invention is provided with a paddle 40a, which is used to drive the sliding member 40 to slide relative to the fixing member 20 along the first direction. In other embodiments, the paddle 40a may not be provided, and the sliding member 40 may be directly driven to slide relative to the fixing member 20 along the first direction. The number of paddles 40a of the present invention is not limited. In this embodiment, along the first direction, the sliding member 40 has a first paddle 41 and a second paddle 42 that are sequentially arranged at intervals. In other implementations, the number of paddles may be other numbers, such as one, three, or other numbers.

[0050] Preferably, reference Figure 13 and Figure 14 The sliding member 40 is provided with a paddle 40a on one side facing away from the fixing member 20, along the first direction ( Figure 13 and Figure 14 (shown in the X direction), one end of the paddle 40a is the first paddle portion 40c, and the other end is the second paddle portion 40b. Figure 13 and Figure 14 The number of the paddle 40a is shown as one. The operator's finger applies force to the first paddle portion 40c or the second paddle portion 40b to paddle the paddle 40a so that the sliding member 40 slides relative to the fixed member 20 along the first direction. In this embodiment, the first paddle portion 40c and the second paddle portion 40b are arc-shaped, and the surface is provided with an anti-slip member 40f (refer to Figure 16 ).

[0051] It should be noted that the specific shape of the paddle 40a is not limited, as long as it can be moved by the operator. Figure 15 In one embodiment, the paddle 40a is in a rectangular parallelepiped shape. Figure 16In another embodiment, the paddle 40a has an opening 40e. Preferably, the opening 40e of the paddle 40a penetrates the paddle 40a. The operator's finger can be placed in the opening 40e of the paddle 40a to apply force to the paddle 40a. In other embodiments, the opening 40e does not penetrate the paddle 40a, and it is sufficient to facilitate the operator's finger to apply force to the paddle 40a through the opening 40e.

[0052] refer to Figure 4 and Figure 13 In the initial state, the first end 31 of the piston 30 is against the bottom of the syringe 10, and the first end 31 of the piston 30 cannot continue to move toward the puncture needle along the first direction. The operator holds the hand-held part 21 with some fingers of one hand, and the hand-held part 21 is subjected to a force F1 toward the palm, and the palm and the end of the fixing member 20 away from the syringe 10 are against each other, and the fixing member 20 is subjected to a force F2 away from the palm. Under the action of the two opposite forces, the fixing member 20 and the syringe 10 remain stationary, and the puncture needle remains stationary when inserted into the cell tissue, which is relatively stable.

[0053] refer to Figure 5 and Figure 13 When the finger of one hand moves the paddle 40a, in this embodiment, the first paddle 41 is moved, the sliding member 40 moves backward (toward the palm of the hand, Figure 5 The piston 30 is driven to move backwards, so that there is 1-2 ml of air in the syringe 10, that is, the first paddle 41 is moved in the first direction away from the puncture needle; then the puncture device 1 is operated to insert into the human tissue, and the puncture needle is inserted into the cell tissue and remains motionless; then the piston 30 is operated to move backwards (in the direction of the palm), so that there is a certain negative pressure in the syringe 10, and the cell tissue will be sucked out; after seeing the cell tissue being sucked out, pull it out of the human tissue; drop the sucked cell tissue onto the slide, push it evenly, and fix it with 95% alcohol after the smear is dry and send it for inspection. When the fingers of one hand push the second paddle 42, the sliding member 40 moves forward (away from the palm direction, Figure 4 The piston 30 is driven to move forward to perform the injection action.

[0054] In other embodiments, reference Figure 13 The above process is to move the paddle 40a to make the sliding member 40 move forward or backward.

[0055] That is, during the puncture process, the operator holds the puncture device 1 with part of the fingers and the palm of one hand, so that the fixing member 20 and the syringe 10 remain stationary, and the remaining fingers of the one hand independently move the paddle 40a.

[0056] In other words, when the operator operates the trocar 1 of the present invention, the handheld portion 21 of the trocar 1 is the first force application point. Along the first direction, the end of the fixing member 20 away from the syringe barrel 10 is the second force application point, and the sliding member 40 is the third force application point. In this embodiment, the first flap 41 or the second flap 42 is the third force application point. Among them, the first force application point and the second force application point play a role in stabilizing the trocar 1, and the third force application point plays a role in driving the piston 30 to move to complete the suction action or the injection action. Thus, the operator can operate the trocar 1 of the present invention with one hand to achieve the suction action or the injection action without mutual interference, which is convenient for the suction action during the puncture aspiration examination and the trocar 1 is stable during puncture.

[0057] Reference Figures 6 to 8 , in this embodiment, the fixing member 20 is in a cylindrical shape and can achieve nested fixation with the syringe barrel 10. The first cavity 23 of the fixing member 20 can be understood as the space formed by the inner contour of the fixing member 20. Preferably, the fixing member 20 is in a plate shape, and the space formed by the inner contour of the plate-shaped fixing member is the first cavity of the fixing member. Preferably, the first cavity 23 at least includes an arc-shaped portion, such as a semi-circular space, and can also include a circular space; that is, the space formed by the inner contour of the fixing member 20 is the first cavity 23 of the fixing member 20. In this embodiment, the fixing member 20 is provided with a first opening 22 extending along the first direction ( Figure 7 the X direction shown in Figure 4 ), and the first opening 22 exposes the piston 30. In this embodiment, the first opening 22 exposes the second end 32 of the piston 30. Combining Figure 5 and

[0058] shown, the connecting portion 43 faces the first opening 22. When the sliding member 40 slides in the first direction, it drives the second end 32 of the piston 30 to slide in the first cavity 23.

[0059] Continue to refer to Figure 8 , in this embodiment, there are two first openings 22 and they are arranged in parallel. However, the number of the first openings 22 is not limited, for example, it can be one, or other numbers. In this embodiment, the two first openings 22 are spaced apart along the second direction ( Figure 8 the Y direction shown in

[0060] ), and the second direction is perpendicular to the first direction. The first openings 22 are symmetrically arranged on the syringe barrel 10, which is convenient for installation and can also reduce weight. Figures 9 to 11As shown, the slider 40 is provided with a second opening 45 extending in the first direction. In this embodiment, along the first direction, the first flap 41 and the second flap 42 are located at both ends of the second opening 45. In other embodiments, in this embodiment, the first flap 41 and the second flap 42 are located at other positions of the slider 40, and can be toggled by the operator to move the slider 40 relative to the fixed member 20 in the first direction. Refer to Figures 5 to 7 , there are two holding parts 21, which are symmetrically arranged on the fixed member 20, and one of the holding parts 21 extends out of the second opening 45. In this embodiment, the second opening 45 can move relative to the fixed member 20 in the first direction until the first flap 41 or the second flap 42 abuts against the holding part 21.

[0061] In other embodiments, refer to Figures 13 to 15 , there is no opening provided on the surface of the slider 40.

[0062] The specific position of the holding part 21 is not limited, as long as it can be held by the operator. In this embodiment, the two holding parts 21 are spaced apart on the fixed member 20 along the second direction ( Figure 8 as shown by the Y direction in Figure 8 ), and the two holding parts 21 are symmetrically arranged along the central axis of the puncture device 1 (

[0063] as shown by the O in

[0064] ). The central axis of the puncture device 1 can be understood as the central axis of the cylindrical fixed member 20. The holding parts 21 are two handles symmetrically arranged on the mounting part, which is convenient for holding.

[0065] In addition, in this embodiment, when the second opening 45 moves relative to the fixed member 20 in the first direction until the second flap 42 abuts against the holding part 21, the first end 31 of the piston 30 moves to the bottom of the syringe barrel 10. However, the present invention is not limited thereto. In other embodiments, when the first end 31 of the piston 30 moves to the bottom of the syringe barrel 10 along the first direction, the second opening 45 moves relative to the fixed member 20 in the first direction until the second flap 42 does not abut against the holding part 21, and there is a gap between the holding part 21 and the second flap 42. Figures 13 to 14 Figure 8 Figure 8It can be in the shape of a circle (as shown), a rectangle, etc., as long as it can be held by the operator. In this embodiment, the handheld portion 21 has an opening 21c. The opening 21c of the handheld portion 21 penetrates through the handheld portion 21, and the handheld portion 21 is integrally annular. The operator's finger can be placed in the opening 21c of the handheld portion 21 to apply a force to the handheld portion 21. In other embodiments, the opening 21c does not penetrate through the handheld portion 21, as long as it facilitates the operator's finger to apply a force to the handheld portion 21 through the opening 21c.

[0066] Continuing to refer to Figure 8 , the handheld portion 21 has a connected first portion 21a and a second portion 21b. Among them, the first portion 21a is perpendicular to the fixing member 20, that is, the first portion 21a of the handheld portion 21 extends in the second direction, and the second portion 21b of the handheld portion 21 bends toward the first flap 41, and the shape of the handheld portion 21 is arc-shaped. Such a setting facilitates the operator to hold the puncture device 1 and can hold it stably. It should be noted that the shape of the handheld portion 21 is not limited as long as it can be held by the operator. For example, in other embodiments, referring to Figure 12 , the handheld portion 21 is integrally bent.

[0067] The syringe holder of the present invention is provided with a gear member on the movement path of the sliding member 40 for reminding the aspiration amount or injection amount of the syringe, that is, the aspiration amount or injection amount of the puncture device 1.

[0068] Preferably, referring to Figures 13 to 17 , the gear member includes at least one first gear member 44a provided on the sliding member 40 and at least one second gear member 44b provided on the fixing member 20. Along the first direction, the stroke of the first gear member 44a moving to abut against the second gear member 44b is a preset value, and the preset value corresponds to the aspiration amount or injection amount of the syringe; when the first gear member 44a moves to abut against the second gear member 44b, under the action of an external force, the sliding member 40 can continue to move relative to the fixing member 20 in the first direction.

[0069] In this embodiment, along the circumferential direction ( Figure 13 and Figure 14As shown in the Z direction, the slider 40 has a first end 46 and a second end 47, and at least one of the first end 46 and the second end 47 of the slider 40 is provided with a first gear member 44a. In this embodiment, both the first end 46 and the second end 47 of the slider 40 are provided with the first gear member 44a. In other embodiments, one of the first end 46 and the second end 47 of the slider 40 is provided with the first gear member 44a. A second gear member 44b is provided on the fixing member 20 of the present invention at a portion corresponding to the end of the slider 40 where the first gear member 44a is installed, and the first gear member 44a and the second gear member 44b are arranged along the first direction. In this embodiment, both the first end 46 and the second end 47 of the slider 40 are provided with the first gear member 44a. Correspondingly, second gear members 44b are provided on the fixing member 20 at portions corresponding to the first end 46 and the second end 47 of the slider 40.

[0070] When the slider 40 slides along the first direction, when the first gear member 44a on the slider 40 touches the second gear member 44b on the fixing member 20, an obvious resistance will be generated to remind the operator that the set suction volume or injection volume has been reached.

[0071] Reference Figures 15 to 17 , in this embodiment, two first gear members 44a are provided on the slider 40 at intervals along the first direction, and one second gear member 44b is provided on the fixing member 20. The number of gear members is not limited and is set accordingly according to the needs of the suction volume or injection volume.

[0072] In addition, referring to Figure 9 and Figure 10 and combining with Figure 2 as shown, in other embodiments, at least one gear member 44 is provided on the slider 40, and two gear members 44 are provided at intervals along the first direction. In other embodiments, other numbers of gear members can be set. Along the first direction, the stroke of the gear member 44 moving to abut against the hand-held portion 21 is a preset value, and the preset value corresponds to the suction volume or injection volume of the syringe.

[0073] The specific position of the gear member 44 on the slider 40 is not limited. In this embodiment, at least one gear member 44 is provided on the pore wall of the second opening 45 of the slider 40. In this embodiment, two gear members 44 are provided at intervals along the first direction. In this embodiment, the gear member 44 is a protrusion provided on the pore wall of the second opening 45. When the slider 40 slides along the first direction, relative sliding occurs between the hand-held portion 21 and the second opening 45. When the hand-held portion 21 touches the gear member 44, an obvious resistance will be generated to remind the operator that the set suction volume or injection volume has been reached.

[0074] The above preset values are not limited. For example, the stroke of one of the gear members 44 moving to abut against the handheld portion 21 corresponds to a suction volume of 0.5 ml, which belongs to the small negative pressure state; the stroke of another gear member 44 moving to abut against the handheld portion 21 corresponds to a suction volume of 1.5 ml, which belongs to the large negative pressure state compared to the small negative pressure state. In other embodiments, the preset values can be set accordingly as needed.

[0075] It should be noted that when the gear member 44 moves to abut against the handheld portion 21, under the action of an external force, the sliding member 40 can continue to move relative to the fixed member 20 in the first direction. That is, when the gear member 44 moves to abut against the handheld portion 21, when the first dial 41 or the second dial 42 is further dialed, the sliding member 40 can continue to move relative to the fixed member 20 in the first direction.

[0076] In other embodiments, referring to Figure 12 , the fixed member 20 is provided with at least one gear member 44, Figure 12 One gear member 44 is shown in

[0077] It should be noted that in other embodiments, when the sliding member 40 moves to abut against the gear member 44, under the action of an external force, the sliding member 40 can continue to move relative to the fixed member 20 in the first direction. That is, when the sliding member 40 moves to abut against the gear member 44, when the sliding member 40 is further dialed, such as dialing the first dial 41 or the second dial 42, the sliding member 40 can continue to move relative to the fixed member 20 in the first direction.

[0078] Referring to Figure 9 and Figure 11 , the cross-section of the contact surface where the sliding member 40 of the present invention fits with the outer surface of the fixed member 20 is an arc surface. The arc surface coincides with the outer contour of the fixed member 20 and cooperates with each other to slide, playing a guiding role. In this embodiment, the arc surface is a major arc surface, that is, the central angle corresponding to the arc surface is greater than 180°. This can enable the sliding member 40 to be both connected to the fixed member 20 and not separated from the fixed member 20, and also enable the sliding member 40 to have a relative sliding with the fixed member 20 in the first direction.

[0079] In summary, the above embodiments provided by the present invention only exemplarily illustrate the principles and effects of the present invention, rather than being used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A syringe holder for mounting a syringe, It is characterized in that include: A fixing member extending in a first direction, the fixing member having a first cavity and a hand-held portion, the syringe barrel of the syringe being inserted into the first cavity of the fixing member and fixedly connected to the fixing member, and the piston of the syringe being at least partially located in the first cavity of the fixing member; a sliding member, disposed on the fixing member, capable of sliding relative to the fixing member along the first direction, the sliding member being in contact with an outer surface of the fixing member, the sliding member having a connecting portion, the connecting portion being used to connect with a piston in the syringe, and capable of driving the piston to move in the first cavity of the fixing member along the first direction; The end of the fixing member away from the syringe is used to rest against the palm of the operator, wherein the hand-held part is the first force point, along the first direction, the end of the fixing member away from the syringe is the second force point, and the sliding member is the third force point.

2. The syringe holder according to claim 1, It is characterized in that The fixing member is provided with a first opening extending along the first direction, the first opening exposes the piston, and the connecting portion is arranged toward the first opening.

3. The syringe holder according to claim 1, It is characterized in that The sliding member is provided with a paddle for driving the sliding member to slide relative to the fixing member along the first direction.

4. The syringe holder according to claim 3, It is characterized in that The paddle is provided on a side of the sliding member facing away from the fixing member. Along the first direction, one end of the paddle is a first paddle portion, and the other end is a second paddle portion.

5. The syringe holder according to claim 4, It is characterized in that The paddle has an opening.

6. The syringe holder according to claim 1, It is characterized in that The hand-held portion is provided on a side of the fixing member facing away from the sliding member.

7. The syringe holder according to claim 1, It is characterized in that The shape of the handheld part includes a ring shape, an arc shape or a rectangle shape.

8. The syringe holder according to claim 1, It is characterized in that Along the first direction, the sliding member has a first paddle and a second paddle which are sequentially arranged at intervals.

9. The syringe holder according to claim 1, It is characterized in that A gear member is provided on the movement path of the sliding member, which is used to remind the syringe of the suction amount or injection amount.

10. The syringe holder according to claim 9, It is characterized in that The shift member includes at least one first shift member provided on the sliding member and at least one second shift member provided on the fixed member. Along the first direction, the stroke of the first shift member moving to counteract the second shift member is a preset value, and the preset value corresponds to the suction volume or injection volume of the syringe. When the first shift member moves to counteract the second shift member, under the action of external force, the sliding member can continue to move relative to the fixed member in the first direction.

11. The syringe holder according to claim 10, It is characterized in that Circumferentially, the sliding member has a first end and a second end, and at least one of the first end and the second end of the sliding member is provided with the first gear member; a portion of the fixing member corresponding to the end of the sliding member where the first gear member is installed is provided with the second gear member.

12. The syringe holder according to claim 1, characterized in that the cross-section of the contact surface where the sliding member fits the outer surface of the fixing member is an arc surface.

13. The syringe holder according to claim 12, characterized in that the arc surface is a major arc surface.

14. A puncture device, characterized in that it includes: a syringe, and the syringe includes: a barrel extending in a first direction and having a second cavity, and the barrel is used for arranging a puncture needle communicated with the second cavity; a piston having a first end and a second end along the first direction, and the first end is arranged in the second cavity; the syringe holder according to any one of claims 1-13, the barrel is inserted into the first cavity of the fixing member and fixedly connected to the fixing member, and the second end of the piston extends out of the second cavity and is located in the first cavity of the fixing member and connected to the connecting portion.

15. The puncture device according to claim 14, characterized in that the fixing member is provided with a first opening extending in the first direction, the first opening exposes the second end of the piston, and the connecting portion is arranged towards the first opening.

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