Side pressure type safe blood taking needle

Abstract

The utility model relates to a side pressure type safe blood taking needle which comprises a shell. The needle core comprises a needle cap and a needle body part, a pressing piece is arranged on the shell, and the pressing piece is provided with a touch pressing part in an extending mode in the direction facing the interior of the shell; a first bulge extending outwards in the radial direction is arranged on the needle body part; the pressing piece is provided with a standby position and a pressing position; under the condition that the needle cap is not removed, the pressing piece is located at the standby position, and the touch pressing part abuts against the first protrusion to prevent pressing of the pressing piece. Under the condition that the needle cap is removed and the needle core moves in the emitting direction, the pressing piece is still located at the standby position, and the first protrusion is disengaged from abutting against the touch pressing part based on the movement of the needle core in the emitting direction; when the pressing piece is located at the pressing position, the needle core is suitable for being emitted in the emitting direction. According to the side pressure type safe blood taking needle, blood can not be taken when the side pressure type safe blood taking needle is not unlocked, and the side pressure type safe blood taking needle is safer to use.

Description

Technical Field

[0001] The embodiment of the utility model relates to the field of blood collection needles, and in particular to a side pressure type safety blood collection needle. Background Art

[0002] At present, disposable safe blood collection needles are mainly used by medical staff in medical institutions such as hospitals and clinics to draw blood from patients. According to the blood collection habits, some medical staff are accustomed to the side pressing method. Some side pressing blood collection needles on the clinical market can be pressed at will before and after use, which has the risk of accidental firing. Utility Model Content

[0003] In order to alleviate or solve at least one aspect or at least one point of the above problems, the present utility model is proposed.

[0004] The embodiment of the utility model provides a side pressure type safety blood collection needle, comprising:

[0005] case;

[0006] The needle core comprises a needle cap and a needle body.

[0007] The housing is provided with a pressing member, and the pressing member is provided with a pressing portion extending in a direction toward the inside of the housing;

[0008] The needle body is provided with a first protrusion extending radially outward;

[0009] The pressing member has a standby position and a pressing position;

[0010] When the needle cap is not removed, the pressing member is in the standby position, and the contact and pressing portion abuts against the first protrusion to prevent the pressing member from pressing;

[0011] When the needle cap is removed so that the needle core moves in the firing direction, the pressing member is still in the standby position, and the first protrusion is separated from the contact with the pressing portion based on the movement of the needle core in the firing direction;

[0012] When the pressing member is in the pressed position, the needle core is suitable for being fired along the firing direction.

[0013] Optionally, the pressing member is provided with a side stop extending in a direction toward the inside of the housing, and the needle body is provided with a second protrusion extending radially outward;

[0014] When the needle cap is removed, the needle core moves in the firing direction until the side stop abuts against the second protrusion, and at this time, the pressing member is still in the standby position;

[0015] When the pressing member is in the pressing position, the side stopper is disengaged from the abutment with the second protrusion due to the downward movement of the pressing member, so as to allow the needle core to continue to be fired along the firing direction.

[0016] Optionally, the end of the side stop portion has a snap-fit ​​structure facing the inside of the shell, and the shell is also provided with a snap-fit ​​structure;

[0017] The pressing member also has a post-pressing position.

[0018] When the pressing member is in the pressed position, the snap-fit ​​structure is adapted to snap-fit ​​with the snap-fit ​​matching structure to prevent the pressing member from being pressed again.

[0019] Optionally, in the radial direction, the distance between the radial outer edge of the second protrusion and the axis of the blood collection needle body is smaller than the distance between the inner wall surface of the side stop and the axis of the blood collection needle body, and

[0020] The distance between the radial outer edge of the second protrusion and the axis of the blood collection needle body is greater than the distance between the inner edge of the clamping structure and the axis of the blood collection needle body.

[0021] Optionally, the snap-fit ​​structure is a first hook-shaped structure, the curved hook of the first hook-shaped structure faces the direction of the blood collection needle body; the snap-fit ​​structure is a second hook-shaped structure, the curved hook of the second hook-shaped structure faces the emission direction;

[0022] The first hook-shaped structure and the second hook-shaped structure are adapted to be engaged with each other to prevent the pressing member from being pressed again.

[0023] Optionally, a sinking groove is provided in the shell so that the side stopper can move downward after the pressing member is pressed.

[0024] Optionally, in the radial direction, the distance between the radial outer edge of the first protrusion and the axis of the blood collection needle body is greater than the distance between the radial outer edge of the second protrusion and the axis of the blood collection needle body.

[0025] Optionally, an extension length of the side blocking portion is greater than an extension length of the contact and pressure portion.

[0026] Optionally, the contact and pressure portion and the side stop portion are integrally formed, and the contact and pressure portion and the side stop portion are spaced apart in the firing direction of the blood collection needle, or a groove is provided between the contact and pressure portion and the side stop portion.

[0027] Optionally, the needle body further comprises two guide blocks arranged opposite to each other, and a first guide groove and a second guide groove are respectively arranged in the shell;

[0028] The two guide blocks are suitable for moving along the first guide groove and the second guide groove along the launching direction.

[0029] Optionally, one end of the first guide groove has a first limiting step, and one end of the second guide groove has a second limiting step;

[0030] The first limiting step and the second limiting step are used to prevent the guide block from moving toward the rear end.

[0031] Optionally, a first end point limiting step and a second end point limiting step are respectively provided in the housing;

[0032] The first end point limiting step and the second end point limiting step are respectively located at the front ends of the first guide groove and the second guide groove, and are used to prevent the guide block from moving toward the front end.

[0033] Optionally, the needle cap has two first steps arranged opposite to each other, and the front end of the housing is respectively provided with a third limiting step and a fourth limiting step;

[0034] The third limiting step and the fourth limiting step are respectively used to prevent the two first steps from moving toward the front end.

[0035] Optionally, the shell includes an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected via a hole-column matching structure;

[0036] The pressing member is arranged on the upper shell, and the snap-fitting structure is arranged on the lower shell.

[0037] By applying the embodiments of the utility model, the blood collection needle can be used to collect blood when it is not unlocked, that is, in the initial state, blood cannot be collected when the needle cap is not removed; after the needle cap is removed, blood collection can be carried out based on pressing the side, which is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of a side-pressing safety blood collection needle according to an exemplary embodiment of the utility model;

[0039] Figure 2 for Figure 1 Schematic diagram of the explosion of the side-pressing safety blood collection needle;

[0040] Figure 3 for Figure 1 A three-dimensional schematic diagram of a side-pressing safety blood collection needle from another perspective;

[0041] Figure 4 for Figure 1 A three-dimensional schematic diagram of the needle core in FIG.

[0042] Figure 5 for Figure 1 Another three-dimensional schematic diagram of the needle core in FIG.

[0043] Figure 6 for Figure 1 A three-dimensional schematic diagram of the upper shell in FIG.

[0044] Figure 7 for Figure 1 A three-dimensional schematic diagram of the lower shell in FIG.

[0045] Figure 8 This is a diagram of the state of the side-pressing safety blood collection needle after the needle cap is unscrewed;

[0046] Fig. 9 This is a state diagram of the side-pressing safety blood collection needle after the button is pressed;

[0047] Fig.10 This is a state diagram of the side-pressing safety blood collection needle when collecting blood after the button is pressed;

[0048] Fig.11 This is a diagram of the state of the side-press safety blood collection needle after firing.

[0049] In the figure: 1. Blood collection needle;

[0050] 2. upper shell, 2-1. pressing member, 2-2. supporting portion, 2-2-1. contact and pressure portion, 2-2-2. side stop portion, 2-2-3. first hook-shaped structure; 2-3. third limiting step, 2-4. first limiting step, 2-5. first guide groove, 2-6. first end point limiting step, 2-7. first slot;

[0051] 3. lower shell, 3-1. fourth limiting step, 3-2. second limiting step, 3-3. second guide groove, 3-4. second end limiting step, 3-5. second slot hole, 3-6. second hook-shaped structure, sinking groove 3-7;

[0052] 4. Elastic parts;

[0053] 5. bottom cover, 5-1. first hook, 5-2. second hook;

[0054] 6. Needle core, 6-1. Needle shell, 6-2. Blood collection needle body, 6-2-1. Needle tip, 6-2-2. Cylinder, 6-3. Needle cap, 6-3-1. First step, 6-4. Needle body, 6-4-1. First protrusion, 6-4-2. Second protrusion, 6-4-3. Guide block, 6-4-4. Third protrusion, 6-4-5. Second step, 6-5. Connecting part. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the utility model.

[0056] According to an exemplary embodiment of the present invention, Figure 1-11 As shown, a side-pressing safety blood collection needle 1 comprises: a shell, an elastic member 4, a bottom cover 5 and a needle core 6.

[0057] In the present invention, exemplarily, the housing includes an upper housing 2 and a lower housing 3 , and the upper housing 2 , the lower housing 3 and the bottom cover 5 together form a receiving cavity, and the needle core 6 is installed in the receiving cavity.

[0058] The terms "upper", "lower", "front" and "rear" in this utility model are schematic descriptions. Figure 2 The directions of “up”, “down”, “front” and “back” are shown.

[0059] According to an exemplary embodiment of the present invention, Figure 4 and Figure 5 As shown, the specific structure of the needle core 6 is shown. The needle core 6 includes: a needle shell 6-1 and a blood collection needle body 6-2, and the blood collection needle body 6-2 is located in the needle shell 6-1. Among them, the needle shell 6-1 includes a needle cap 6-3 and a needle body 6-4, and the needle cap 6-3 and the needle body 6-4 are connected by a connecting part 6-5.

[0060] The blood collection needle body 6-2 includes: a needle tip portion 6-2-1 and a cylindrical portion 6-2-2;

[0061] The needle body 6-4 includes: a first protrusion 6-4-1, a second protrusion 6-4-2, a guide block 6-4-3 and a third protrusion 6-4-4, and the guide block 6-4-3 is formed with a second step 6-4-5;

[0062] The needle cap 6-3 is provided with a first step 6-3-1.

[0063] According to an exemplary embodiment of the present invention: Figure 3 and Figure 6 The figure shows the specific structure of the upper shell 2 of the shell, which includes: a pressing member 2-1, a supporting portion 2-2 located below the contact surface of the pressing member 2-1, a third limiting step 2-3, a first limiting step 2-4, a first guide groove 2-5, a first end point limiting step 2-6 and a first slot 2-7;

[0064] The supporting portion 2-2 includes: a contact and pressure portion 2-2-1, a side stop portion 2-2-2 and a clamping structure at the end of the side stop portion 2-2-2;

[0065] Optionally, the snap-fit ​​structure is a first hook-shaped structure 2-2-3.

[0066] According to an exemplary embodiment of the present invention: Figure 3 and Figure 7 The figure shows the specific structure of the lower shell 3 of the shell, which includes: a fourth limiting step 3-1, a second limiting step 3-2, a second guide groove 3-3, a second end limiting step 3-4, a second slot 3-5 and a snap-fit ​​structure;

[0067] Optionally, the snap-fit ​​structure is a second hook-shaped structure 3-6.

[0068] The following is combined with Figure 1-11 Explain the matching relationship between the various components:

[0069] According to an exemplary embodiment of the present invention: Figure 3 As shown, a pressing member 2-1 is provided on the shell, and a pressing portion 2-2-1 is provided on the pressing member 2-1 extending in a direction toward the inside of the shell.

[0070] In an optional embodiment, the pressing member 2-1 is further provided with a side stop 2-2-2 extending in a direction toward the interior of the housing.

[0071] The contact and pressure portion 2 - 2 - 1 and the side stop portion 2 - 2 - 2 together constitute the support portion 2 - 2 of the pressing member 2 - 1 .

[0072] In an optional embodiment, the shell includes an upper shell 2 and a lower shell 3, wherein the pressing member 2-1 is located on the upper shell 2 of the shell.

[0073] When the needle cap 6-3 is not removed, the pressing member 2-1 is in the standby position, and the contact portion 2-2-1 abuts against the first protrusion 6-4-1 to prevent the pressing member 2-1 from pressing; at this time, the contact portion 2-2-1 is located above the first protrusion 6-4-1, that is, the first protrusion 6-4-1 abuts against the contact portion 2-2-1.

[0074] In the initial state, the side stopper 2-2-2 and the second protrusion 6-4-2 are not in contact and there is a certain distance between them; after the needle cap 6-3 is removed, the needle core 6 moves forward in the firing direction until the side stopper 2-2-2 abuts against the second protrusion 6-4-2, so that the needle core 6 stops moving. That is, after the needle cap 6-3 is removed, the needle core 6 moves forward. At this time, due to the existence of the side stopper 2-2-2, the side stopper 2-2-2 can prevent the second protrusion 6-4-2 from continuing to move forward. At this time, the pressing member 2-1 is still in the standby position, and the first protrusion 6-4-1 is separated from the abutment with the contact and pressing portion 2-2-1 based on the movement of the needle core 6 in the firing direction.

[0075] When the pressing piece 2-1 is pressed, the side block 2-2-2 moves downward, and the side block 2-2-2 releases the obstruction to the second protrusion 6-4-2, that is, the side block 2-2-2 is disengaged from the abutment with the second protrusion 6-4-2 based on the downward movement of the pressing piece 2-1, so that the needle core 6 continues to move along the emission direction.

[0076] In one embodiment, the contact and pressure portion 2-2-1 and the side blocking portion 2-2-2 are integrally formed, and the contact and pressure portion 2-2-1 and the side blocking portion 2-2-2 are spaced apart in the launching direction of the blood collection needle.

[0077] In an optional embodiment, a groove is provided between the contact and pressure portion 2-2-1 and the side blocking portion 2-2-2, and the contact and pressure portion 2-2-1 and the side blocking portion 2-2-2 form a "U"-shaped structure.

[0078] In one embodiment, the extension length of the side blocking portion 2-2-2 is greater than the extension length of the contact and pressure portion 2-2-1.

[0079] like Figure 4 and Figure 5 As shown, the needle core 6 is composed of a needle shell 6-1 and a blood collection needle body 6-2. The needle shell 6-1 includes a needle cap 6-3 and a needle body 6-4. The needle cap 6-3 and the needle body 6-4 are connected by a connecting portion 6-5. The diameter of the connecting portion 6-5 is smaller than the diameter of the needle cap 6-3 close to the connecting portion 6-5.

[0080] In one embodiment, the rear end of the needle body portion 6-4 is provided with at least one third protrusion 6-4-4 arranged circumferentially around the needle body portion 6-4, and one end of the elastic member 4 is fixed to the rear end of the needle body portion 6-4 through the third protrusion 6-4-4 and is limited and fixed by the third protrusion 6-4-4.

[0081] In one embodiment, the third protrusion 6-4-4 can be multiple, or can be evenly arranged around the needle body 6-4. The elastic member 4 can be a spring, or other elastic and stretchable biasing member.

[0082] The blood collection needle body 6-2 is composed of a needle tip portion 6-2-1 and a cylindrical portion 6-2-2. Most of the needle tip portion 6-2-1 is buried in the needle cap 6-3, and most of the cylindrical portion 6-2-2 is buried in the needle body portion 6-4.

[0083] The needle body 6-4 is provided with a first protrusion 6-4-1 extending radially outward, a second protrusion 6-4-2 extending radially outward, and a guide block 6-4-3. In the radial direction, the distance between the radial outer edge of the first protrusion 6-4-1 and the axis of the blood collection needle body is greater than the distance between the radial outer edge of the second protrusion 6-4-2 and the axis of the blood collection needle body.

[0084] In one of the embodiments, in the radial direction, the distance between the radial outer edge of the second protrusion 6-4-2 and the axis of the blood collection needle body 6-2 is smaller than the distance between the inner wall surface of the side stop 2-2-2 and the axis of the blood collection needle body 6-2, and the distance between the radial outer edge of the second protrusion 6-4-2 and the axis of the blood collection needle body 6-2 is greater than the distance between the inner edge of the clamping structure 2-2-3 and the axis of the blood collection needle body 6-2.

[0085] So that after the needle cap 6-3 is removed and before the pressing piece 2-1 is pressed, the needle core 6 moves in the firing direction until the snap-fit ​​structure of the side stop 2-2-2 abuts against the second protrusion 6-4-2. At this time, based on the abutment between the snap-fit ​​structure and the second protrusion 6-4-2, the needle core 6 stops moving.

[0086] After the pressing piece 2-1 is pressed, the side block 2-2-2 moves downward with the pressing piece 2-1, and the clamping structure 2-2-3 of the side block 2-2-2 releases the contact block to the second protrusion 6-4-2, so that the second protrusion 6-4-2 can pass through the side block 2-2-2, so that the needle core 6 can continue to be launched forward.

[0087] In one embodiment, the inner sides of the front ends of the upper shell 2 and the lower shell 3 are respectively provided with a third limiting step 2-3 and a fourth limiting step 3-1; the inner sides of the rear ends of the upper shell 2 and the lower shell 3 are respectively provided with a first limiting step 2-4 and a second limiting step 3-2.

[0088] The first step 6-3-1 at the front end of the needle core 6 is limited by the third limiting step 2-3 and the fourth limiting step 3-1 on the inner side of the front end of the upper shell 2 and the lower shell 3, that is, the third limiting step 2-3 and the fourth limiting step 3-1 prevent the first step 6-3-1 from moving toward the front end, so that the needle core 6 cannot be pulled forward in a natural state.

[0089] The second step 6 - 4 - 5 at the rear end of the needle core 6 is limited by the first limiting step 2 - 4 and the second limiting step 3 - 2 on the inner side of the rear ends of the upper shell 2 and the lower shell 3 .

[0090] In one embodiment, the needle body portion 6-4 includes two guide blocks 6-4-3 arranged opposite to each other, and a second step 6-4-5 is formed between the guide block 6-4-3 and the main body of the needle body portion 6-4, and the end faces of the second step 6-4-5 are respectively abutted against the end faces of the first limiting step 2-4 and the second limiting step 3-2.

[0091] The first limiting step 2-4 and the second limiting step 3-2 can prevent the guide block 6-4-3 from moving toward the rear end, so that the needle core 6 cannot be pressed backward in a natural state.

[0092] like Figure 6 and Figure 7 As shown, the first guide groove 2-5 and the second guide groove 3-3 are respectively provided in the upper shell 2 and the lower shell 3, and the two relatively arranged guide blocks 6-4-3 of the needle body 6-4 are respectively located in the first guide groove 2-5 and the second guide groove 3-3 in the upper and lower shells, and can move back and forth in the first guide groove 2-5 and the second guide groove 3-3 under the action of the spring.

[0093] The first limiting step 2-4 is located at the rear end of the first guide groove 2-5, and the second limiting step 3-2 is located at the rear end of the second guide groove 3-3.

[0094] In one embodiment, the inner sides of the front ends of the upper shell 2 and the lower shell 3 are respectively provided with a first end stop step 2-6 and a second end stop step 3-4, the first end stop step 2-6 is located at the front end of the first guide groove 2-5, and the second end stop step 3-4 is located at the front end of the second guide groove 3-3. The first end stop step 2-6 and the second end stop step 3-4 are used to prevent the guide block 6-4-3 from moving forward, that is, when the needle core 6 is fired forward, the first end stop step 2-6 and the second end stop step 3-4 can resist the guide block 6-4-3, so that the needle body cannot continue to move forward.

[0095] In one of the embodiments, the end of the side stop 2-2-2 has a first hook-shaped structure 2-2-3 facing the inside of the shell, and the lower shell 3 is provided with a second hook-shaped structure 3-6.

[0096] After the needle core 6 is fired and returns, the pressing member 2-1 has been released, and the first hook-shaped structure 2-2-3 hooks the second hook-shaped structure 3-6 to prevent the pressing member 2-1 from being pressed again. That is, after the blood collection is completed, the needle core 6 returns to the housing, and the first hook-shaped structure 2-2-3 and the second hook-shaped structure 3-6 are engaged, so that the blood collection needle cannot be pressed for a second time after being fired for blood collection.

[0097] In one of the embodiments, a sinking groove 3-7 is provided in the lower shell 3 of the shell, so that the side stopper 2-2-2 can move downward after the pressing member 2-1 is pressed until it enters the sinking groove 3-7.

[0098] Among them, the second hook-shaped structure 3-6 is arranged adjacent to the sunken groove 3-7, and the hook of the second hook-shaped structure 3-6 is bent toward the direction of the sunken groove 3-7.

[0099] In one embodiment, the curved hook of the first hook-shaped structure 2 - 2 - 3 faces the inside of the housing, and the curved hook of the second hook-shaped structure 3 - 6 faces the launching direction of the needle core 6 .

[0100] In one embodiment, the bottom cover 5 has two first hooks 5-1 arranged opposite to each other, and the rear ends of the upper shell 2 and the lower shell 3 are respectively provided with a first slot 2-7 and a second slot 3-5, and the two first hooks 5-1 are respectively fixed in the first slot 2-7 and the second slot 3-5.

[0101] In one of the embodiments, a second hook 5 - 2 is further provided on the bottom cover 5 , and the other end of the elastic member 4 is fixedly connected to the second hook 5 - 2 of the bottom cover 5 . In the initial state, the elastic member 4 is in a compressed state.

[0102] In one embodiment, the first hook 5 - 1 is an outer hook on the bottom cover 5 , and the second hook 5 - 2 is an inner hook 5 - 2 on the bottom cover 5 .

[0103] In one embodiment, the upper shell 2 and the lower shell 3 are connected and fixed together through a hole-column matching structure.

[0104] Combination Figure 1-11 The working principle of the side pressure safety blood collection needle of the utility model is described as follows:

[0105] In the initial state, when the needle cap 6-3 is not removed, the contact portion 2-2-1 of the side pressure safety blood collection needle of the present invention is located above the first protrusion 6-4-1 of the needle core 6, and the first protrusion 6-4-1 abuts against the contact portion 2-2-1, so that the pressing member 2-1 cannot be pressed downward.

[0106] like Figure 8As shown, after the needle cap 6-3 is rotated, the needle shell 6-1 breaks from the connecting portion 6-5, the needle cap 6-3 is separated from the needle body 6-4, and the needle tip 6-2-1 of the blood collection needle body 6-2 is exposed; at this time, the first step 6-3-1 at the front end of the needle core 6 is released from the restriction by the third limiting step 2-3 and the fourth limiting step 3-1 of the upper shell body 2 and the lower shell body 3, and under the compression elastic force of the elastic member 4, the needle body 6-4 pops out forward for a distance. At this time, the first protrusion 6-4-1 of the needle body 6-4 is separated from the abutment of the contact and pressure portion 2-2-1 of the upper shell body 2 and is no longer located below the contact and pressure portion 2-2-1. The needle body 6-4 moves forward until the second protrusion 6-4-2 of the needle body 6-4 contacts the side stop 2-2-2, and then the needle body 6-4 stops shooting outward.

[0107] Afterwards, if Fig. 9 and Fig.10 As shown, place the front end of the shell body close to the site to be blood drawn, and press downward on the pressing piece 2-1 of the upper shell body 2. At this time, the pressing piece 2-1 drives the side blocking part 2-2-2 to move downward together. When the side blocking part 2-2-2 moves down and no longer contacts the second protrusion 6-4-2 of the needle body part 6-4, the needle body part 6-4 continues to be ejected forward under the compression force of the elastic part 4.

[0108] When the upper and lower guide blocks 6-4-3 of the needle body 6-4 hit the first end stop step 2-6 and the second end stop step 3-4 of the upper shell 2 and the lower shell 3, the needle body 6-4 stops popping out. During this popping out process, the exposed needle tip 6-2-1 will pierce the blood collection site, and at this time, the elastic member 4 is in a stretched state.

[0109] like Fig.11 As shown, under the pulling force of the elastic member 4, the needle body portion 6-4 retracts into the shell in the opposite direction of the launching direction. Since the needle tip 6-2-1 is lower than the hole surface formed at the front end of the shell, that is, after the needle body portion 6-4 returns to the shell, the needle tip 6-2-1 is inside the shell and the needle outlet at the front end of the shell is not exposed, which can prevent the needle tip 6-2-1 from injuring medical staff.

[0110] After the pressing member 2-1 is pressed and the needle body 6-4 pops out, the pressing member 2-1 is released. At this time, the first hook-shaped structure 2-2-3 of the upper shell 2 will hook on the second hook-shaped structure 3-6 of the lower shell 3 to ensure that the pressing member 2-1 cannot be pressed again.

[0111] The side-pressure safety blood collection needle of the utility model can prevent blood collection when it is not unlocked, that is, when the needle cap is not removed, and can prevent blood collection by pressing for a second time after firing, so it is safer in use.

[0112] It should be noted that the above technical solutions can be arbitrarily combined under logical circumstances, all within the scope of protection of the present utility model. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0113] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0114] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes and combinations of elements may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A side pressure safety blood collection needle, comprising: case; The needle core comprises a needle cap and a needle body. Features: The housing is provided with a pressing member, and the pressing member is provided with a pressing portion extending in a direction toward the inside of the housing; The needle body is provided with a first protrusion extending radially outward; The pressing member has a standby position and a pressing position; When the needle cap is not removed, the pressing member is in the standby position, and the contact and pressing portion abuts against the first protrusion to prevent the pressing member from pressing; When the needle cap is removed so that the needle core moves in the firing direction, the pressing member is still in the standby position, and the first protrusion is separated from the contact with the pressing portion based on the movement of the needle core in the firing direction; When the pressing member is in the pressed position, the needle core is suitable for being fired along the firing direction.

2. The side pressure safety blood collection needle according to claim 1, characterized in that: The pressing member is provided with a side stop extending in a direction toward the inside of the housing, and the needle body is provided with a second protrusion extending radially outward; When the needle cap is removed, the needle core moves in the firing direction until the side stop abuts against the second protrusion, and at this time, the pressing member is still in the standby position; When the pressing member is in the pressing position, the side stopper is disengaged from the abutment with the second protrusion due to the downward movement of the pressing member, so as to allow the needle core to continue to be fired along the firing direction.

3. The side pressure safety blood collection needle according to claim 2, characterized in that: The end of the side stop portion has a snap-fit ​​structure facing the inside of the housing, and the housing is also provided with a snap-fit ​​matching structure; The pressing member also has a post-pressing position. When the pressing member is in the pressed position, the snap-fit ​​structure is adapted to snap-fit ​​with the snap-fit ​​matching structure to prevent the pressing member from being pressed again.

4. The side pressure safety blood collection needle according to claim 3, characterized in that: In the radial direction, the distance between the radial outer edge of the second protrusion and the axis of the blood collection needle body is smaller than the distance between the inner wall surface of the side stop and the axis of the blood collection needle body, and The distance between the radial outer edge of the second protrusion and the axis of the blood collection needle body is greater than the distance between the inner edge of the clamping structure and the axis of the blood collection needle body.

5. The side pressure safety blood collection needle according to claim 3, characterized in that: The snap-fit ​​structure is a first hook-shaped structure, the curved hook of which faces the direction of the blood collection needle body; the snap-fit ​​structure is a second hook-shaped structure, the curved hook of which faces the launching direction; The first hook-shaped structure and the second hook-shaped structure are adapted to be engaged with each other to prevent the pressing member from being pressed again.

6. The side pressure safety blood collection needle according to claim 3, characterized in that: A sinking groove is arranged in the shell so that the side stopper can move downward after the pressing member is pressed.

7. The side pressure safety blood collection needle according to claim 2, characterized in that: In the radial direction, the distance between the radial outer edge of the first protrusion and the axis of the blood collection needle body is greater than the distance between the radial outer edge of the second protrusion and the axis of the blood collection needle body.

8. The side pressure safety blood collection needle according to claim 2, characterized in that: The extending length of the side blocking portion is greater than the extending length of the contact and pressure portion.

9. The side pressure safety blood collection needle according to claim 2, characterized in that: The contact and pressure portion and the side stop portion are integrally formed, and the contact and pressure portion and the side stop portion are spaced apart in the launching direction of the blood collection needle, or a groove is provided between the contact and pressure portion and the side stop portion.

10. The side pressure safety blood collection needle according to any one of claims 1 to 9, characterized in that: The needle body also includes two guide blocks arranged opposite to each other, and the housing is provided with a first guide groove and a second guide groove respectively; The two guide blocks are suitable for moving along the first guide groove and the second guide groove along the launching direction.

11. The side pressure safety blood collection needle according to claim 10, characterized in that: One end of the first guide groove has a first limiting step, and one end of the second guide groove has a second limiting step; The first limiting step and the second limiting step are used to prevent the guide block from moving toward the rear end.

12. The side pressure safety blood collection needle according to claim 11, characterized in that: The housing is provided with a first end point limiting step and a second end point limiting step respectively; The first end point limiting step and the second end point limiting step are respectively located at the front ends of the first guide groove and the second guide groove, and are used to prevent the guide block from moving toward the front end.

13. The side pressure safety blood collection needle according to claim 1, characterized in that: The needle cap is provided with two first steps arranged opposite to each other, and the front end of the housing is provided with a third limiting step and a fourth limiting step respectively; The third limiting step and the fourth limiting step are respectively used to prevent the two first steps from moving toward the front end.

14. The side pressure safety blood collection needle according to claim 3, characterized in that: The housing comprises an upper housing and a lower housing, and the upper housing and the lower housing are fixedly connected via a hole-column matching structure; The pressing member is arranged on the upper shell, and the snap-fitting structure is arranged on the lower shell.

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