Outer sliding sleeve tension detection device of safety needle

Abstract

The invention discloses an outer sliding sleeve tension detection device of a safety needle, which belongs to the technical field of safety needle detection and comprises an outer sleeve tension detection mechanism and a positioning mould. The jacket pulling force detection mechanism comprises a jacket detection frame, a jacket pulling force detection unit, a lifting seat and a push plate, the jacket pulling force detection unit comprises a jacket pulling block and a pulling force sensor, the jacket pulling block is connected with the push plate through the pulling force sensor, and the jacket pulling block and the push plate are arranged on the lifting seat in a front-back sliding mode; the positioning mould comprises a positioning rack and a fixing assembly, and the fixing assembly can tightly press the safety needle. The positioning mold is simple in structure, the positioning mold can act on a fixed part of the safety needle, stable positioning of the safety needle is achieved, the positioning requirement of the safety needle during outer sliding sleeve tension detection is met, preparation is made for automatic outer sliding sleeve tension detection, automatic outer sliding sleeve tension detection is convenient and rapid and is not affected by human factors, and the safety needle can be accurately positioned. And the tension detection efficiency and quality of the outer sliding sleeve of the safety needle are improved.

Description

Technical Field

[0001] The invention relates to an outer sliding sleeve tension detection device for a safety needle, belonging to the technical field of safety needle detection. Background Art

[0002] After using injection needles, blood collection needles, dispensing needles, flushing needles and other medical needles, most people will just throw them away. Since traditional injection needles, blood collection needles, dispensing needles, flushing needles and other medical needles do not have safety protection devices, when cleaning up waste and recycling, workers are often injured by needle sticks, and there is also a risk of cross infection. For this reason, professionals have designed a variety of safety needles that can hide the needles after use to prevent harm to the human body. The sliding sleeve protection safety needle is one of them that is very convenient to operate.

[0003] The so-called sliding sleeve protection safety needle Z00 is as follows Figure 19-21 As shown, it includes a needle handle Z01 and a needle Z14 inserted in the needle handle Z01. The needle handle Z01 connects the needle Z14 with one end of the catheter Z12. The needle handle Z01 is provided with a wing Z04. The other end of the catheter Z12 is connected to the needle holder Z13. It also includes an inner sliding sleeve Z05, an outer sliding sleeve Z09 and a needle shield Z11 sleeved on the needle handle Z01. The factory state of the safety needle Z00 is that the outer sliding sleeve Z09 and the inner sliding sleeve Z05 are sleeved on the root of the needle handle Z01 in sequence, and the needle shield Z11 is sleeved on the head of the needle handle Z01 and protects the needle Z14. When in use, the medical staff removes the shield and can use it like an ordinary needle. Before discarding after use, the medical staff only needs to gently pull the outer sliding sleeve Z09 to make the outer sliding sleeve Z09 and the inner sliding sleeve Z05 unfold in sequence to protect the needle Z14. In this way, the needle Z14 will not injure the staff during the garbage transfer and processing, so it is called the safety needle Z00.

[0004] In order to prevent the inner sleeve Z05 and the outer sleeve Z09 from sliding randomly and affecting normal use, or from retracting under external force after being pulled apart and exposing the needle Z14 when discarded, a locking mechanism needs to be provided on the needle handle Z01, the inner sleeve Z05 and the outer sleeve Z09, and the locking mechanism includes a first card slot Z02 provided at the rear of the needle handle Z01, a second card slot Z03 provided at the front of the needle handle Z01, a first buckle Z06 provided at the rear of the inner sleeve Z05, a third card slot Z07 provided at the rear of the inner sleeve Z05, a fourth card slot Z08 provided at the front of the inner sleeve Z05, and a second buckle Z10 provided at the rear of the outer sleeve Z09. In the factory state, the first card slot Z02 and the first buckle Z06, and the third card slot Z07 and the second buckle Z10 are mutually engaged and in a locked state, which will not affect normal operation. When it is necessary to discard and pull it apart, the first buckle Z06 and the second slot Z03, the second buckle Z10 and the fourth slot Z08 are respectively engaged in a locked state and will not retract.

[0005] Since the inner sleeve, outer sleeve and needle handle are generally made of plastic, their slots and buckles cannot guarantee precise fit, and the injection needle needs to be connected to adjacent parts by gluing on the production line. In the factory state, the inner sleeve, outer sleeve and needle handle may be too tightly fitted, making it difficult for medical staff to pull the sleeve, which does not meet the environmental protection requirements for discarding safety needles. Therefore, it is very important to control the sleeve tension of each safety needle within the standard requirements, and whether it meets the requirements requires the safety needle to be pulled.

[0006] At present, the tension test of the outer sleeve of the safety needle can only rely on manual pulling and sampling, which has the following shortcomings: first, the efficiency of the tension test of the outer sleeve is too low, and it cannot be fully tested due to the influence of manual inspection efficiency; second, there is no accurate standard for the strength and it depends on feeling; third, the stroke is not well controlled. Once the manual pulling force is too large and it is pulled to the locked state when it is discarded, the outer sleeve of the safety needle cannot be restored, and the safety needle as a whole can only be scrapped. As a disposable consumable, the safety needle is used in large quantities, so an efficient and accurate automated tension test device for the outer sleeve of the safety needle is needed, which can replace manual sampling to complete the tension test of the outer sleeve of the safety needle. Summary of the invention

[0007] Aiming at the deficiencies in the prior art, the present invention provides a device for detecting the tension of an outer sleeve of a safety needle.

[0008] The technical solution of the present invention to solve the above technical problem is as follows: a safety needle outer sleeve tension detection device, comprising an outer sleeve tension detection mechanism for detecting the outer sleeve tension of the safety needle and a positioning jig for carrying the safety needle;

[0009] The outer jacket tension detection mechanism includes an outer jacket detection frame, an outer jacket tension detection unit, a lifting seat, a push plate, a lifting drive mechanism for driving the lifting seat to move up and down, and a tension drive mechanism for driving the push plate to move forward and backward, the outer jacket tension detection unit is located above the positioning jig, and the lifting seat is arranged on the outer jacket detection frame through the lifting drive mechanism;

[0010] The outer jacket tension detection unit includes an outer jacket pull block and a tension sensor, the outer jacket pull block is connected to the push plate through the tension sensor, and the outer jacket pull block and the push plate are slidably arranged on the lifting seat.

[0011] The positioning jig includes a positioning frame and a fixing assembly arranged on the positioning frame. The positioning frame is provided with a positioning structure for positioning the safety needle. The fixing assembly can press the safety needle when the safety needle is subjected to tension testing. The fixing assembly can be loosened and away from the safety needle when the safety needle is loaded or unloaded.

[0012] The beneficial effects of the present invention are as follows: the safety needle is placed on the positioning jig, the positioning jig can press the safety needle, and prepare for the tension detection of the outer sleeve. Then, under the action of the lifting drive mechanism, the lifting seat descends, the outer sleeve pull block of the outer sleeve tension detection unit descends and acts on the outer sleeve. Under the action of the tension drive mechanism, the push plate moves forward and pulls the outer sleeve forward, and the tension sensor can detect the tension of pulling the outer sleeve. The present invention has a simple structure, and the positioning jig can act on the immovable part of the safety needle to achieve stable positioning of the safety needle, meet the positioning requirements of the outer sleeve tension detection of the safety needle, and realize the automatic tension detection of the inner sleeve. The automatic tension detection is convenient and fast, not affected by human factors, and improves the efficiency and quality of the tension detection of the outer sleeve of the safety needle.

[0013] Based on the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, the jacket tension detection unit also includes an electromagnet and a connector that can magnetically cooperate with the electromagnet. The electromagnet is arranged on the push plate, and the electromagnet is connected to the tension sensor through the connector.

[0015] The beneficial effect of adopting the above further scheme is that the outer sleeve of the safety needle may not be pulled during the tension test, such as the outer sleeve is glued or stuck during the assembly of the safety needle. In this case, if the outer sleeve is forcibly pulled, the safety needle or the tension detection component such as the tension sensor of the outer sleeve detection unit may be damaged. The connector cooperates with the electromagnet magnetic attraction. When the maximum tension required by the outer sleeve exceeds the electromagnet suction, that is, when the outer sleeve cannot be pulled, the connector will be disconnected from the electromagnet. Although the push plate moves forward, the connector does not move forward with the push plate, the tension sensor and the outer sleeve pull block do not move forward, and the outer sleeve is not forcibly pulled to avoid damage to the tension detection component. When the positioning jig can position multiple safety needles, the corresponding safety needles are set in the outer sleeve tension detection unit independently of each other and will not interfere with each other. If there is an outer sleeve that cannot be pulled, it will not affect the tension detection of the corresponding safety needle outer sleeve by other tension detection units.

[0016] Furthermore, the coat detection frame is also provided with a limit assembly for limiting the top of the positioning frame, and the limit assembly includes a limit slide and a limit drive cylinder for driving the limit slide to move forward and backward, and the limit slide is slidably arranged on the coat detection frame.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that when the outer sliding sleeve of the safety needle is subjected to tension testing, the safety needle needs to be pressed tightly by the positioning jig. The positioning jig will be subjected to an upward driving force, and a limiting slide plate is provided on the outer sleeve detection frame. The limiting slide plate can be extended backward under the action of the limiting drive cylinder and act on the top of the positioning frame, so as to balance the force of the positioning jig.

[0018] Furthermore, the outer jacket detection frame is also provided with a lifting drive mechanism for driving the positioning jig to compress the safety pin or compress the safety pin and clamp the inner sheath, and the lifting drive mechanism includes a lifting plate and a lifting drive cylinder for driving the lifting plate to move up and down.

[0019] The beneficial effect of adopting the above further scheme is that the drive of the positioning jig can be set on the outer cover detection frame, which can reduce the weight of the positioning jig transferred between various workstations and reduce energy consumption. After the positioning jig is in place, the lifting drive mechanism is located below the positioning jig.

[0020] Furthermore, the tension driving mechanism includes a servo motor, a lead screw and a lead screw nut, the lead screw is connected to the lifting seat through a lead screw fixing seat, the lead screw nut is connected to the push plate, and the lead screw is connected to the output shaft of the servo motor.

[0021] The beneficial effect of adopting the above further scheme is that the rotation of the output shaft of the servo motor can drive the screw to rotate, and the movement of the screw nut along the axial direction of the screw realizes the movement of the push plate in the front-to-back direction, thereby realizing the movement of the outer sleeve pull block in the front-to-back direction.

[0022] Furthermore, the lifting drive mechanism includes a lifting drive cylinder, the lifting drive cylinder is arranged on the coat detection frame, and the piston rod of the lifting drive cylinder is connected to the lifting seat.

[0023] The beneficial effect of adopting the above further solution is that the lifting seat can move up and down under the action of the lifting drive cylinder, thereby realizing the up and down movement drive of the outer cover pull block.

[0024] Furthermore, the fixing assembly includes an assembly support portion and a fixing pressing block disposed on the assembly support portion and capable of acting on the needle handle and / or wing of the safety needle;

[0025] The fixed pressure block has an original position and a pressing position. The fixed pressure block in the original position can be moved to the upper side of the corresponding pressing position by moving in the front-back and left-right directions, and then moved to the pressing position by moving in the up-down direction to press the safety needle; the fixed pressure block in the pressing position can be moved out of the pressing position by moving in the up-down direction to release the safety needle, and then returned to the original position by moving in the front-back and left-right directions.

[0026] The beneficial effect of adopting the above further scheme is that when the outer sleeve of the safety needle needs to be tested for tension, the fixed pressure block can be moved to the clamping position to clamp the safety needle, and the outer sleeve pulling block can be moved down to the outer sleeve position under the action of the lifting drive mechanism, and the outer sleeve is pulled forward under the action of the tension drive mechanism, so that the second buckle of the outer sleeve can be disengaged from the third slot of the inner sleeve, and whether the tension of the outer sleeve meets the requirements is tested. After the tension test of the outer sleeve is completed, the fixed pressure block can return to the original position, which is convenient for the unloading of the safety needle after the test and the loading of the safety needle waiting to be tested. Limitations are placed on the conversion of the fixed pressure block between the original position and the pressing position. The fixed pressure block in the original position first moves in the front-to-back and left-to-right directions, and then moves in the up-to-down direction to descend to the pressing position to press the safety needle; the fixed pressure block in the pressing position first moves in the up-to-down direction, that is, rises to disengage from the safety needle, and then moves in the front-to-back and left-to-right directions to return to the original position, which will not interfere with the taking and placing of the safety needle, is not only conducive to the loading and unloading of the safety needle, but also will not damage the safety needle when pressing and releasing the safety needle, thereby ensuring the quality and efficiency of the tension detection of the outer sliding sleeve of the safety needle.

[0027] Furthermore, the assembly support part includes a fixed frame, a fixed slide, a fixed bar, a movable track plate and a fixed track plate, the fixed frame is set on the positioning frame for sliding up and down, the fixed slide is set on the fixed frame for sliding back and forth, the fixed bar is set on the fixed slide for sliding left and right, the fixed pressure block is set on the fixed bar, the fixed track plate is set on the fixed frame, and the movable track plate is set on the fixed slide for sliding up and down; a first linkage is provided between the movable track plate and the fixed bar, a second linkage is provided between the movable track plate and the fixed track plate, and the fixed slide is also provided with a limit pin assembly that can lock and unlock with the movable track plate.

[0028] The beneficial effect of adopting the above further scheme is that in order to realize the movement of the fixed pressure block between the original position and the pressing position, the relative relationship between the above-mentioned various components in the fixed assembly is set to meet the demand for the position change of the fixed pressure block between the original position and the pressing position. When the fixed pressure block moves to the pressing position, the movable track plate moves downward under the action of power drive, and the fixed bar drives the fixed pressure block to move to the right under the action of the first linkage member. Since the fixed frame is set on the positioning frame for sliding up and down, the fixed frame will not move in the forward and backward directions. Therefore, at the same time, under the action of the second linkage member, the movable track plate moves downward under the action of the second linkage member. The movable track plate will move forward. Since the movable track plate is set on the fixed slide plate for sliding up and down, the fixed slide plate will carry the fixed strip and the fixed pressure block to move forward. When the movable track plate moves to the limit position where the movable track plate cannot move forward under the action of the second linkage member, the movable track plate will no longer move forward under the influence of the fixed track plate, and the fixed pressure block can move right forward to above the pressing position. When the movable track plate moves downward again, it will drive the fixed track plate to move downward. Since the fixed track plate is installed on the fixed frame, and the fixed frame is set on the positioning frame for sliding up and down, the fixed frame moves downward, and the fixed pressure block moves downward. When the safety pin is positioned stably, the rear end plate of the outer sleeve pull block can act on the rear end surface of the outer sleeve to pull the outer sleeve forward to detect the tension of the inner sleeve; after the tension test is completed, when the fixed pressure block needs to return to the original position, the movable track plate moves upward under the action of power drive, and due to the locking and matching relationship between the limit pin assembly and the movable track plate, the fixed slide plate is driven to move upward, and the fixed slide plate is set on the fixed frame for sliding back and forth, so the fixed frame moves upward, and the fixed pressure block and The safety pin disengages and rises above the clamping position, and the movable track plate continues to move upward. The lock between the limit pin assembly and the movable track plate is released. After the release, the movable track plate drives the fixed bar to move leftward under the action of the first linkage member, and under the action of the second linkage member, the fixed track plate is set on the fixed frame, and the fixed frame can only slide up and down, so the movable track plate moves backward, thereby driving the fixed slide plate, the fixed bar and the fixed pressure block on the fixed bar to move backward. The fixed pressure block can be reset by moving leftward and backward, and then the safety pin that has completed the tension test can be discharged, and the safety pin to be tested can be loaded onto the positioning rack and wait for testing.

[0029] Furthermore, the limit pin assembly includes a pin rack, an overhead pin movably arranged on the pin rack, and a latch pin, the pin rack is arranged on the fixed slide plate, the movable track plate is provided with a pin slot, a latch pin spring is provided between the latch pin and the fixed slide plate, under the action of the latch pin spring, the free end of the latch pin can act on the side of the movable track plate or be inserted into the pin slot, a pin push rod is provided on the latch pin, a pin push groove matching the pin push rod is provided at the lower part of the overhead pin, a pin limiting ring is provided at the upper part of the overhead pin, an overhead spring is mounted on the overhead pin between the pin limiting ring and the pin rack, and a limiting plate capable of positioning the pin limiting ring is provided on the positioning frame.

[0030] When the movable track plate is reset, the movable track plate moves upward under the action of the limit pin assembly and the pin frame is fixedly mounted on the fixed slide plate, and the fixed slide plate is slidably arranged on the fixed frame forward and backward, so that the fixed frame will be driven to move upward as a whole, and the fixed pressure block will first rise and move away from the safety pin. As the pin frame moves upward, the pin limit ring contacts the limit plate of the positioning frame, the overhead force compresses the overhead spring and moves downward, the pin lever moves left, the pin compresses the pin spring, the pin disengages from the pin slot, and the fixed pressure block moves up and into place. As the movable track plate continues to move upward, under the action of the first linkage member, the fixed bar carries the fixed pressure block to move left, and under the action of the second linkage member, the movable track plate drives the fixed slide plate to move backward, and the fixed pressure block moves left and back to its original position.

[0031] Furthermore, the first linkage member includes a first oblique slot hole and a first limiting column movable in the first oblique slot hole, the first oblique slot hole is arranged on the movable track plate, and the first limiting column is arranged on the fixing bar.

[0032] The beneficial effect of adopting the above further scheme is that the first limit column can move in the first inclined slot hole. Under the action of the first linkage member, when the movable track plate moves in the up and down directions, the fixed pressure block can move in the left and right directions, thereby realizing the power transmission from the up and down movement of the movable track plate to the left and right movement of the fixed pressure block.

[0033] Furthermore, the second linkage member includes a second oblique slot hole and a second limiting column that can move in the second oblique slot hole, the second oblique slot hole is arranged on the fixed track plate, and the second limiting column is arranged on the movable track plate.

[0034] The beneficial effect of adopting the above further solution is that the second limiting column can move in the second oblique slot hole, and under the action of the second linkage, when the movable track plate moves in the up-down direction, the fixed pressure block can move in the front-back direction, realizing the power transmission from the up-down movement of the movable track plate to the front-back movement of the fixed pressure block. Moreover, when the second limiting column reaches the front limit position of the second oblique slot hole, as the movable track plate moves downward, it can also drive the fixed track plate and the fixed frame to move downward, realizing the downward movement of the fixed pressure block.

[0035] Furthermore, the positioning structure includes a wing bracket for positioning the wing of the safety needle and a sheath notch for positioning the needle sheath of the safety needle.

[0036] The beneficial effect of adopting the above further scheme is that the wing bracket can realize positioning and supporting the wing of the safety needle and the needle handle around the wing. When the fixing assembly acts on the needle handle and / or the wing to compress the safety needle, the wing bracket can cooperate therewith to realize the compression of the safety needle. The sheath groove can realize the support and positioning of the needle sheath of the safety needle. The positioning of the safety needle is more stable and reliable, and can meet the requirements of the outer sleeve tension detection of the safety needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the present invention;

[0038] Figure 2 It is a structural schematic diagram of angle 1 of the jacket tension detection mechanism of the present invention;

[0039] Figure 3 It is a structural schematic diagram of angle 2 of the jacket tension detection mechanism of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of multiple outer jacket tension detection units of the present invention;

[0041] Figure 5 It is a structural schematic diagram of the placement state of the safety needle of the positioning fetus of the present invention;

[0042] Figure 6 It is a top view schematic diagram of the safety needle of the present invention in the placement state;

[0043] Figure 7 It is a three-dimensional structural schematic diagram of the safety needle of the present invention in a placement state;

[0044] Figure 8 It is a structural schematic diagram of the safety needle positioning state of the present invention;

[0045] Fig. 9 It is a top view schematic diagram of the safety needle positioning state of the present invention;

[0046] Fig.10It is a schematic diagram of the three-dimensional structure of the safety needle in the positioning state of the present invention;

[0047] Fig.11 It is a structural schematic diagram of the fixed pressing block of the fixed assembly of the present invention in the original position;

[0048] Fig.12 It is a structural schematic diagram of the matching state of the limit pin assembly and the movable track plate in the original position of the present invention;

[0049] Fig.13 It is a schematic diagram of the structure of the overhead and the latch of the present invention;

[0050] Fig.14 It is a structural schematic diagram of the fixed pressing block of the fixed assembly of the present invention in the pressing position;

[0051] Fig.15 It is a structural schematic diagram of the matching state of the limit pin assembly and the movable track plate in the pressing position of the present invention;

[0052] Fig.16 This is a structural schematic diagram of the shield clamping assembly of the present invention clamping the needle shield at angle 1;

[0053] Fig.17 It is a structural schematic diagram of the sheath clamping assembly of the present invention clamping the needle sheath in the second state;

[0054] Fig.18 It is a schematic structural diagram of the shield clamping assembly of the present invention in a state where the needle shield is released;

[0055] Fig.19 is a schematic diagram of the structure of a safety needle;

[0056] Fig. 20 This is a schematic diagram of the structure of the safety needle with the outer sleeve pulled out;

[0057] Fig.21 It is a schematic diagram of the split structure of the safety needle;

[0058] In the figure, 100, positioning frame; 101, fixed pressure block; 102, fixed frame; 103, fixed slide plate; 104, fixed bar; 105, movable track plate; 106, fixed track plate; 107, pin frame; 108, overhead; 109, latch; 110, pin slot; 111, latch spring; 112, overhead spring; 113, pin lever; 114, pin limiting ring; 115, pin slot; 116, first oblique slot hole; 117, second oblique slot hole; 118, first limiting column; 119, second limiting column; 120, sheath claw frame; 121, sheath clamping claw; 122, clamping claw spring; 123, top block support plate; 124, top block; 125, driving top plate; 126, connecting column; 127, wing bracket; 128, sheath notch; 129, tube positioning notch; 130, limit plate; 131, double-wing baffle; 132, fork; 133, main shaft; 134, first notch; 135, second notch; 200, coat detection frame; 201, coat pull block; 202, tension sensor; 203, connector; 204, electromagnet; 205, lifting seat; 206, push plate; 207, limit slot; 208, lifting drive cylinder; 209, servo motor; 210, lead screw; 211, lead screw nut; 212, limit slide plate; 213, limit drive cylinder; 214, lifting plate; 215, lifting drive cylinder;

[0059] Z00, safety needle; Z01, needle handle; Z02, first slot; Z03, second slot; Z04, wing; Z05, inner sleeve; Z06, first buckle; Z07, third slot; Z08, fourth slot; Z09, outer sleeve; Z10, second buckle; Z11, needle sheath; Z12, catheter; Z13, needle holder; Z14, needle. DETAILED DESCRIPTION

[0060] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0061] like Figure 1-Figure 18 As shown, a safety needle outer sleeve tension detection device comprises an outer sleeve tension detection mechanism for detecting the tension of the outer sleeve Z09 of the safety needle Z00 and a positioning jig for carrying the safety needle Z00;

[0062] The outer jacket tension detection mechanism includes an outer jacket detection frame 200, an outer jacket tension detection unit, a lifting seat 205, a push plate 206, a lifting drive mechanism for driving the lifting seat 205 to move up and down, and a tension drive mechanism for driving the push plate 206 to move forward and backward. The outer jacket tension detection unit is located above the positioning jig, and the lifting seat 205 is arranged on the outer jacket detection frame 200 through the lifting drive mechanism.

[0063] The outer jacket tension detection unit includes an outer jacket pull block 201 and a tension sensor 202, wherein the outer jacket pull block 201 is connected to the push plate 206 via the tension sensor 202, and the outer jacket pull block 201 and the push plate 206 are slidably arranged on the lifting seat 205;

[0064] The positioning jig includes a positioning frame 100 and a fixing assembly arranged on the positioning frame 100. The positioning frame 100 is provided with a positioning structure for positioning the safety needle Z00. The fixing assembly can press the safety needle Z00 when the safety needle Z00 is subjected to tension testing. The fixing assembly can be loosened and away from the safety needle Z00 when the safety needle Z00 is loaded or unloaded.

[0065] The outer jacket tension detection unit further includes an electromagnet 204 and a connector 203 that can be magnetically matched with the electromagnet 204. The electromagnet 204 is arranged on a push plate 206, and the electromagnet 204 is connected to the tension sensor 202 through the connector 203. The push plate 206 is provided with a limit groove 207 for constraining the connector 203. One end of the connector 203 is connected to the tension sensor 202, and the other end of the connector 203 can move in the limit groove 207.

[0066] The coat detection frame 200 is also provided with a limit assembly for limiting the top of the positioning frame 100. The limit assembly includes a limit slide 212 and a limit drive cylinder 213 for driving the limit slide 212 to move forward and backward. The limit slide 212 is slidably arranged on the coat detection frame 200.

[0067] The coat detection frame 200 is also provided with a lifting drive mechanism for driving the positioning jig, and the lifting drive mechanism includes a lifting plate 214 and a lifting drive cylinder 215 for driving the lifting plate 214 to move up and down. The lifting plate 214 can act on the movable track plate 105 to directly drive the movable track plate 105. Of course, when the needle sheath Z11 needs to be held tightly while the safety needle Z00 is pressed, the lifting plate 214 can act on the driving top plate 125, and the movable track plate 105 and the driving top plate 125 can be driven simultaneously through the fork mechanism.

[0068] The pulling force driving mechanism includes a servo motor 209 , a lead screw 210 and a lead screw nut 211 . The lead screw 210 is connected to the lifting seat 205 via a lead screw 210 fixing seat. The lead screw nut 211 is connected to the push plate 206 . The lead screw 210 is connected to the output shaft of the servo motor 209 .

[0069] The lifting drive mechanism includes a lifting drive cylinder 208 . The lifting drive cylinder 208 is disposed on the coat detection frame 200 . The piston rod of the lifting drive cylinder 208 is connected to the lifting seat 205 .

[0070] The lifting drive cylinder 208 is connected to the outer coat detection frame 200 through the cylinder seat plate, and a guide rod is provided between the cylinder seat plate and the lifting seat 205. The lifting seat 205 can be guided and limited in its up and down movement, thereby reducing the radial force of the lifting drive cylinder 208 and extending its service life. The lead screw 210 is rotatably connected to the lead screw 210 fixing seat, and the servo motor 209 is connected to the lead screw 210 fixing seat or the lifting seat 205 through the motor bracket.

[0071] The fixing assembly includes an assembly support portion and a fixing pressing block 101 disposed on the assembly support portion and capable of acting on the needle handle Z01 and / or the wing Z04 of the safety needle Z00;

[0072] The fixed pressing block 101 has an original position and a pressing position. The fixed pressing block 101 in the original position can be moved to the upper side of the corresponding pressing position by moving in the front-back and left-right directions, and then moved to the pressing position by moving in the up-down direction to press the needle handle Z01 and / or the wing Z04 of the safety needle Z00; the fixed pressing block 101 in the pressing position can be moved out of the pressing position by moving in the up-down direction to release the needle handle Z01 and / or the wing Z04 of the safety needle Z00, and then returned to the original position by moving in the front-back and left-right directions.

[0073] The assembly support portion includes a fixed frame 102, a fixed slide 103, a fixed bar 104, a movable track plate 105 and a fixed track plate 106. The fixed frame 102 is arranged on the positioning frame 100 to slide up and down through a first slide rail, the fixed slide 103 is arranged on the fixed frame 102 to slide forward and backward through a guide column, the fixed bar 104 is arranged on the fixed slide 103 to slide left and right on a second slide rail, the fixed pressure block 101 is arranged on the fixed bar 104, the fixed track plate 106 is arranged on the fixed frame 102, and the movable track plate 105 is arranged on the fixed slide 103 to slide up and down through a third slide rail; a first linkage is provided between the movable track plate 105 and the fixed bar 104, a second linkage is provided between the movable track plate 105 and the fixed track plate 106, and a limit pin assembly that can be locked and unlocked with the movable track plate 105 is also provided on the fixed slide 103.

[0074] The positioning jig located below the outer jacket tension detection unit can have an independent bracket. For example, in the automated detection of safety needles, the positioning jig can also be installed on a rotating bracket such as a turntable. The rear end plate of the outer jacket pull block 201 acts on the rear end surface of the inner sleeve Z05, and there is an avoidance recess for the avoidance wing Z04 on the rear end plate of the outer jacket pull block 201. When the outer jacket pull block 201 is pulled forward, the rear end plate of the outer jacket pull block 201 can act on the rear end surface of the inner sleeve Z05 to drive the outer sleeve to move forward.

[0075] The fixed pressure block 101 moves from the original position to the clamping position, and the movable track plate 105 moves downward. Under the action of the first linkage, the fixed bar 104 moves to the right. Under the action of the second linkage, the movable track plate 105 carries the fixed slide plate 103 forward. When the second linkage moves into place, the fixed pressure block 101 moves right and forward to the top of the clamping position. As the movable track plate 105 continues to move downward, the fixed track plate 106 moves downward to drive the fixed frame 102 to move downward, and the fixed pressure block 101 moves downward to the clamping position to clamp the safety needle Z00. In the clamping position, the limit pin assembly is locked with the movable track plate 105. After the fixed pressure block 101 clamps the safety needle Z00, the outer sleeve Z09 of the safety needle Z00 can be tested for tension.

[0076] The fixed pressing block 101 returns to the original position from the clamping position, and the movable track plate 105 moves up. Under the locking action of the limit pin assembly and the movable track plate 105, the fixed slide plate 103 and the fixed frame 102 move up. The fixed pressing block 101 releases the safety needle Z00 and moves up. As the movable track plate 105 continues to move up, the limit pin assembly and the movable track plate 105 are unlocked. Under the action of the first linkage, the fixed bar 104 moves to the left. Under the action of the second linkage, the movable track plate 105 moves backward with the fixed slide plate 103, and the fixed pressing block 101 moves left and back to the original position. After the fixed pressing block 101 returns to the original position, the safety needle Z00 after the tension test can be unloaded or the safety needle Z00 to be tested can be loaded.

[0077] The limiting pin assembly includes a pin rack 107, an overhead 108 and a latch 109 movably arranged on the pin rack 107, the pin rack 107 is arranged on the fixed slide 103, a pin slot 110 is arranged on the movable track plate 105, a latch spring 111 is arranged between the latch 109 and the fixed slide 103, under the action of the latch spring 111, the free end of the latch 109 can act on the side of the movable track plate 105 or be inserted into the pin slot 110, a pin lever 113 is arranged on the latch 109, a pin groove 115 matched with the pin lever 113 is arranged at the lower part of the overhead 108, a pin limiting ring 114 is arranged at the upper part of the overhead 108, an overhead spring 112 is mounted on the overhead 108 between the pin limiting ring 114 and the pin rack 107, and a limiting plate 130 capable of positioning the pin limiting ring 114 is provided on the positioning frame 100.

[0078] The pin frame 107 is provided with a pin hole, which is a stepped hole. The pin 109 is provided with a pin retaining ring, which cooperates with the shoulder of the stepped hole to limit the extension of the pin 109. The pin spring 111 is sleeved on the pin 109, one end of the pin spring 111 acts on the pin retaining ring, and the other end acts on the fixed slide 103. Under the action of the pin spring 111, the pin 109 can act on the side of the movable track plate 105, or extend into the pin slot 110 of the movable track plate 105. The shoulder can limit the pin retaining ring to prevent the pin 109 from being excessively extended under the action of the pin spring 111.

[0079] The first linkage member includes a first oblique slot hole 116 and a first limiting column 118 that can move in the first oblique slot hole 116. The first oblique slot hole 116 is arranged on the movable track plate 105, and the first limiting column 118 is arranged on the fixed bar 104. The first oblique slot hole 116 is inclined rightward from bottom to top. The first limiting column 118 can move in the first oblique slot hole 116. The first oblique slot hole 116 cooperates with the first limiting column 118. When the movable track plate 105 moves in the up and down direction, the fixed bar 104 carrying the fixed pressure block 101 can move in the left and right direction, realizing the power transmission from the up and down movement of the movable track plate 105 to the left and right movement of the fixed pressure block 101.

[0080] The second linkage member includes a second oblique slot hole 117 and a second limiting column 119 that can move in the second oblique slot hole 117, wherein the second oblique slot hole 117 is arranged on the fixed track plate 106, and the second limiting column 119 is arranged on the movable track plate 105. The second oblique slot hole 117 is inclined backward from bottom to top, and the plane where the fixed track plate 106 is located is perpendicular to the plane where the movable track plate 105 is located. The second limiting column 119 can move in the second oblique slot hole 117, and the second limiting column 119 cooperates with the second oblique slot hole 117. When the movable track plate 105 moves in the up and down directions, the movable track plate 105 can drive the fixed slide plate 103 to move in the front and back directions. In addition, when the second limiting column 119 reaches the front limit position of the second oblique slot hole 117, as the movable track plate 105 moves downward, it can also drive the fixed track plate 106 and the fixed frame 102 to move downward, thereby realizing the downward movement of the fixed pressing block 101.

[0081] The positioning structure includes a wing bracket 127 for positioning the wing Z04 of the safety needle Z00 and a sheath notch 128 for positioning the needle sheath Z11 of the safety needle Z00.

[0082] The positioning structure also includes a tube positioning notch 129 for positioning the catheter Z12 of the safety needle Z00. The catheter Z12 is a hose, and the tube positioning notch 129 can position the catheter Z12 of the safety needle Z00 to prevent the catheter Z12 from interfering with the tension detection of the safety needle Z00. The positioning structure has multiple safety needles Z00 on the positioning frame 100, which can ensure that the safety needles Z00 are placed neatly, and the neat positioning of each safety needle Z00 will not interfere with each other, further improving the efficiency and quality of the tension detection of the outer sliding sleeve Z09 of the safety needle Z00.

[0083] The positioning frame 100 also includes a double-wing baffle 131 for limiting the wing Z04 of the safety needle Z00, and an avoidance notch is provided on the double-wing baffle 131. The avoidance notch can avoid the outer sliding sleeve Z09 and the pull block to avoid interfering with the tension detection of the safety needle Z00. The double-wing baffle 131 is located in front of the wing Z04 of the safety needle Z00 to ensure the positioning accuracy of the safety needle Z00 placed on the positioning jig, which is conducive to accurate detection during subsequent tension detection.

[0084] The rear end plate of the outer sleeve pull block 201 is provided with an avoidance recess for avoiding the wing Z04. When the outer sleeve pull block 201 is pulled forward, the outer sleeve pull block 201 can act on the rear end plate of the outer sliding sleeve Z09.

[0085] It also includes a sheath clamping assembly arranged on the positioning frame 100, and the sheath clamping assembly can be used to clamp the needle sheath Z11 of the safety needle Z00. During the tension test, the safety needle Z00 is pressed by the fixing assembly to prepare for positioning the safety needle Z00 for the tension test of the outer sliding sleeve Z09 of the safety needle Z00. Of course, when the fixing assembly presses the safety needle Z00, the needle sheath Z11 can also be held tightly by the sheath clamping assembly to ensure the stability of the outer sliding sleeve Z09 of the safety needle Z00 during the tension test.

[0086] It also includes a fork mechanism, which includes a fork 132, which is rotatably arranged on the positioning frame 100, and a first shifting notch 134 capable of driving the fixing assembly to compress the safety needle Z00 is provided on one end of the fork 132, and a second shifting notch 135 capable of driving the sheath clamping assembly to clamp the needle sheath Z11 of the safety needle Z00 is provided on the other end of the fork 132. The fork 132 can be arranged on a main shaft 133, and the main shaft 133 is connected to the positioning frame 100 through a bearing or a sleeve. The first shifting notch 134 can cooperate with the movable track plate 105 of the fixed assembly, such as a track plate shifting shaft that cooperates with the first shifting notch 134 can be set on the movable track plate 105. When the first shifting notch 134 swings upward or downward, it can drive the movable track plate 105 of the fixed assembly to move upward or downward, thereby achieving the purpose of the fixed assembly releasing the safety needle Z00 or pressing the safety needle Z00; the second shifting notch 135 can cooperate with the sheath clamping assembly, such as driving the top plate 125 to cooperate with the second shifting notch 135. When the second shifting notch 135 swings downward or upward, the sheath clamping assembly can release the needle sheath Z11 or hold the needle sheath Z11. The design of the shifting fork mechanism uses one power to simultaneously meet the needs of the fixed assembly pressing the safety needle Z00 and the sheath clamping assembly clamping the needle sheath Z11 of the safety needle Z00, further improving the positioning stability of the safety needle. The number of driving components is reduced, the cost is lowered, and the weight of the positioning jig is reduced, so that the positioning jig can be easily rotated between various workstations and the rotation energy consumption is reduced.

[0087] The sheath clamping assembly includes a sheath claw frame 120, a sheath clamping unit arranged on the sheath claw frame 120, and a sheath clamping driving mechanism for driving the sheath clamping unit to open and close. The sheath claw frame 120 is arranged on the positioning frame 100. The sheath clamping unit clamps or releases the needle sheath Z11 under the action of the sheath clamping driving mechanism. Under the action of the sheath clamping driving mechanism, the sheath clamping unit can clamp the needle sheath Z11 of the safety needle Z00, and cooperate with the tension detection of the outer sliding sleeve Z09 of the safety needle Z00.

[0088] The sheath clamping unit includes a pair of sheath clamping claws 121 located on both sides of the needle sheath Z11, the middle parts of the sheath clamping claws 121 are hinged on the sheath claw frame 120, and a clamping claw spring 122 is also provided between the upper parts of the pair of sheath clamping claws 121; the sheath clamping drive mechanism includes a top block supporting plate 123 and a top block 124 arranged on the top block supporting plate 123, the top block 124 is correspondingly arranged below the sheath clamping unit, and the top block 124 is provided with a support head capable of propping open the lower part of the pair of sheath clamping claws 121. The upper part of the sheath clamping jaws 121 is the clamping position. The upper parts of the pair of sheath clamping jaws 121 are separated under the action of the clamping jaw spring 122, and will not interfere with the placement of the safety needle Z00. After the safety needle Z00 is placed, the support head of the sheath clamping drive mechanism moves up and is inserted between the lower parts of the pair of sheath clamping jaws 121, so that the lower parts of the pair of sheath clamping jaws 121 can be separated, and the upper parts of the sheath clamping jaws 121 are close to the needle sheath Z11 that can be tightly held to achieve the clamping of the needle sheath Z11 of the safety needle Z00; when releasing, it is only necessary to drive the top plate 125 to move downward, the top block 124 to move downward, the support head leaves the sheath clamping jaws 121, and the upper parts of the pair of sheath clamping jaws 121 are opened under the action of the clamping jaw spring 122 to release the needle sheath Z11.

[0089] The sheath clamping driving mechanism includes a driving top plate 125, and the driving top plate 125 is connected to one end of a connecting column 126, and the other end of the connecting column 126 passes through the sheath claw frame 120 and is connected to the top block supporting plate 123. The clamping force of the needle sheath Z11 can act on the driving top plate 125, and the driving top plate 125 moves upward to drive the top block supporting plate 123 to move, thereby realizing the upward drive of the support head, so that the support head can be inserted between the lower parts of a pair of sheath clamping claws 121, and the driving top plate 125 transmits power to the top block 124 to drive the top block 124 to move up and down.

[0090] When the outer sleeve of the safety needle is subjected to tension testing, the safety needle to be tested is placed on the positioning jig, which is located below the outer sleeve tension testing unit. The safety needle to be subjected to outer sleeve tension testing is placed on the positioning jig. At this time, the fixed pressing block 101 is in the original position, that is, on the left rear side of the wing Z04 of the safety needle Z00, and will not interfere with the placement of the safety needle Z00. The movable track plate 105 moves downward, the first limiting column 118 cooperates with the first oblique slot hole 116, and the fixed bar 104 carries the fixed pressing block 101 to move to the right. Since the second oblique slot hole 117 cooperates with the second limiting column 119, and the fixed track plate 106 is installed on the fixed frame 102, the fixed frame 102 can only move relative to the positioning The frame 100 can not move forward and backward when it moves up and down, so the movable track plate 105 will also move forward. Since the movable track plate 105 is installed on the fixed slide plate 103, it drives the fixed slide plate 103, the fixed bar 104 and the fixed pressure block 101 to move forward. When the second limiting column 119 moves to the front limit position of the second inclined slot hole 117, the fixed pressure block 101 moves right forward to the top of the clamping position. Restricted by the fixed track plate 106, the movable track plate 105 no longer moves forward but only moves downward. As the movable track plate 105 moves downward, the fixed track plate 106 moves downward accordingly through the cooperation of the second limiting column 119 and the second inclined slot hole 117, driving the fixed frame 102 to move downward as a whole, thereby realizing the downward movement of the fixed pressure block 101 Move to the compression position to compress the wing Z04 of the safety needle Z00. At this time, the latch 109 is inserted into the pin slot 110 under the action of the latch spring 111, and the limit pin assembly is locked with the movable track plate 105. The safety needle Z00 is compressed, the lifting drive cylinder 208 is actuated, the lifting seat 205 descends, and the outer sleeve pull block 201 descends to act on the outer sleeve Z09 of the safety needle Z00. The servo motor 209 is actuated, the screw 210 rotates, and the screw nut 211 drives the push plate 206 to move forward, pulling the outer sleeve Z09 forward, and the second buckle Z10 of the outer sleeve Z09 can be disengaged from the third slot Z07 of the inner sleeve Z05 of the safety needle and move forward, and the second buckle Z10 of the outer sleeve Z09 moves to the inner sleeve Between the third card slot Z07 and the fourth card slot Z08 of the sleeve Z05, to avoid the outer sleeve Z09 being pulled out too much and unable to be reset, the tension sensor 202 can detect the tension of pulling the outer sleeve Z09. If the outer sleeve Z00 with the safety needle Z00 on the positioning jig cannot be pulled forward normally, the connector 203 of the corresponding outer sleeve tension detection unit will be disconnected from the electromagnet 204, and the corresponding outer sleeve pulling block 201 will not forcibly pull the outer sleeve Z09; the tension value detected by the tension sensor 202 is the force when the second buckle Z10 of the outer sleeve Z09 is disengaged from the third card slot Z07 on the inner sleeve Z05 of the safety needle. The outer sleeve is generally pulled forward a distance of 3-6mm, and the tension value is generally 3-15N.The tension value detected by the tension sensor 202 can be transmitted to the computer, and the tension value is judged and analyzed on the computer to see whether it meets the requirements; after the detection is completed, the lifting seat 205 and the push plate 206 are reset. When the fixed pressure block 101 needs to be reset, the movable track plate 105 moves up under the drive, and because the latch 109 is plug-in-fitted with the pin slot 110, the fixed slide plate 103 and the fixed frame 102 are driven to move up, and the fixed pressure block 101 leaves the clamping displacement and moves above it. As the fixed slide plate 103 moves upward, the top of the pin limiting ring 114 at the top of the overhead 108 contacts the limiting plate 130. Under the action of the limiting plate 130, the overhead 108 compresses the overhead spring 112 and moves downward, and the pin push slot 115 moves downward. As the overhead 108 moves downward, the pin push rod 113 moves out of the pin pull slot 115, the latch pin 109 moves leftward and disengages from the pin slot 110 to act on the right side surface of the movable track plate 105. As the movable track plate 105 continues to move upward, the fixed bar 104 moves leftward with the fixed pressure block 101 under the cooperation of the first oblique slot hole 116 and the first limiting column 118. Under the cooperation of the second oblique slot hole 117 and the second limiting column 119, since the fixed track plate 106 is fixed on the fixed frame 102, the fixed frame 102 can only move up and down, so the movable track plate 105 will also move backward, driving the fixed slide plate 103 to move backward, the fixed bar 104 and the fixed pressure block 101 on the fixed slide plate 103 move backward, the fixed pressure block 101 moves leftward to the original position, and the fixed pressure block 101 releases the safety pin Z00. The fixing assembly of the positioning jig of the present invention can act on the fixed part of the safety needle to achieve stable positioning of the safety needle Z00, prepare for the automatic tension detection of the outer sleeve Z09, and make the tension detection of the outer sleeve Z09 convenient and fast, thereby improving the tension detection efficiency and quality of the outer sleeve Z09 of the safety needle Z00.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety needle outer sleeve tension detection device, characterized in that: The invention comprises a jacket tension detection mechanism for detecting the tension of an outer sliding sleeve (Z09) of a safety needle (Z00) and a positioning jig for carrying the safety needle (Z00); the jacket tension detection mechanism comprises a jacket detection frame (200), a jacket tension detection unit, a lifting seat (205), a push plate (206), a lifting drive mechanism for driving the lifting seat (205) to move up and down, and a tension drive mechanism for driving the push plate (206) to move forward and backward, the jacket tension detection unit is located above the positioning jig, and the lifting seat (205) is arranged on the jacket detection frame (200) through the lifting drive mechanism; The outer coat tension detection unit comprises an outer coat pull block (201) and a tension sensor (202), the outer coat pull block (201) is connected to the push plate (206) via the tension sensor (202), and the outer coat pull block (201) and the push plate (206) are slidably arranged on the lifting seat (205) in a forward and backward manner; The positioning jig comprises a positioning frame (100) and a fixing assembly arranged on the positioning frame (100); a positioning structure for positioning a safety needle (Z00) is also arranged on the positioning frame (100); and the fixing assembly can press the safety needle (Z00).

2. The outer sleeve tension detection device for a safety needle according to claim 1, characterized in that: The outer jacket tension detection unit further comprises an electromagnet (204) and a connector (203) capable of magnetically cooperating with the electromagnet (204); the electromagnet (204) is arranged on the push plate (206); and the electromagnet (204) is connected to the tension sensor (202) via the connector (203).

3. The outer sleeve tension detection device for a safety needle according to claim 1, characterized in that: The coat detection frame (200) is also provided with a limit assembly for limiting the top of the positioning frame, the limit assembly comprising a limit slide plate (212) and a limit drive cylinder (213) for driving the limit slide plate (212) to move forward and backward, and the limit slide plate (212) is slidably arranged on the coat detection frame (200) forward and backward.

4. The outer sleeve tension detection device for a safety needle according to claim 1, characterized in that: The outer coat detection frame (200) is also provided with a lifting drive mechanism for driving the positioning jig to move, and the lifting drive mechanism comprises a lifting plate (214) and a lifting drive cylinder (215) for driving the lifting plate (214) to move up and down.

5. The outer sleeve tension detection device for a safety needle according to claim 1, characterized in that: The pulling force driving mechanism comprises a servo motor (209), a lead screw (210) and a lead screw nut (211), wherein the lead screw (210) is rotationally connected to the lifting seat (205), the lead screw nut (211) is connected to the push plate (206), and the lead screw (210) is connected to the output shaft of the servo motor (209); And / or the lifting drive mechanism comprises a lifting drive cylinder (208), the lifting drive cylinder (208) is arranged on the coat detection frame (200), and the piston rod of the lifting drive cylinder (208) is connected to the lifting seat (205).

6. The outer sleeve tension detection device for a safety needle according to any one of claims 1 to 5, characterized in that: The fixing assembly comprises an assembly support portion and a fixing pressing block (101) arranged on the assembly support portion and capable of acting on the needle handle (Z01) and / or the wing (Z04) of the safety needle (Z00); The fixed pressing block (101) has an original position and a pressing position. The fixed pressing block (101) in the original position can be moved to the upper side of the corresponding pressing position by moving in the front-back and left-right directions, and then moved to the pressing position to press the safety needle (Z00) by moving in the up-down direction; the fixed pressing block (101) in the pressing position can be moved out of the pressing position to release the safety needle (Z00) by moving in the up-down direction, and then returned to the original position by moving in the front-back and left-right directions.

7. The outer sleeve tension detection device for a safety needle according to claim 6, characterized in that: The assembly support portion comprises a fixed frame (102), a fixed slide plate (103), a fixed bar (104), a movable track plate (105) and a fixed track plate (106); the fixed frame (102) is arranged on the positioning frame (100) to slide up and down; the fixed slide plate (103) is arranged on the fixed frame (102) to slide forward and backward; the fixed bar (104) is arranged on the fixed slide plate (103) to slide left and right; the fixed pressure block (101) is arranged on the fixed bar (104) ), the fixed track plate (106) is arranged on the fixed frame (102), and the movable track plate (105) is slidably arranged on the fixed slide plate (103) up and down; a first linkage is arranged between the movable track plate (105) and the fixed bar (104), a second linkage is arranged between the movable track plate (105) and the fixed track plate (106), and the fixed slide plate (103) is also provided with a limit pin assembly that can lock and unlock with the movable track plate (105).

8. The outer sleeve tension detection device for a safety needle according to claim 7, characterized in that: The limit pin assembly comprises a pin rack (107), a pin (108) movably arranged on the pin rack (107) and a latch (109); the pin rack (107) is arranged on the fixed slide plate (103); a pin slot (110) is arranged on the movable track plate (105); a latch spring (111) is arranged between the latch (109) and the fixed slide plate (103); under the action of the latch spring (111), the free end of the latch (109) can act on the side or the latch of the movable track plate (105) The pin (109) is installed in the pin slot (110), a pin push rod (113) is provided on the latch pin (109), a pin push groove (115) matched with the pin push rod (113) is provided at the lower part of the overhead pin (108), a pin limiting ring (114) is provided at the upper part of the overhead pin (108), an overhead pin spring (112) is sleeved on the overhead pin (108) between the pin limiting ring (114) and the pin frame (107), and a limiting plate (130) capable of positioning the pin limiting ring (114) is provided on the positioning frame (100).

9. The outer sleeve tension detection device for a safety needle according to claim 7, characterized in that: The first linkage member comprises a first oblique slot hole (116) and a first limiting column (118) capable of moving in the first oblique slot hole (116), the first oblique slot hole (116) being arranged on the movable track plate (105), and the first limiting column (118) being arranged on the fixed bar (104); and / or the second linkage member comprises a second oblique slot hole (117) and a second limiting column (119) capable of moving in the second oblique slot hole (117), the second oblique slot hole (117) being arranged on the fixed track plate (106), and the second limiting column (119) being arranged on the movable track plate (105).

10. The outer sleeve tension detection device for a safety needle according to claim 1, characterized in that: The positioning structure comprises a wing bracket (127) for positioning the wing (Z04) of the safety needle (Z00) and a sheath notch (128) for positioning the needle sheath (Z11) of the safety needle (Z00).

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