Tension detection device for inner sliding sleeve of safety needle

Abstract

The invention discloses an inner sliding sleeve tension detection device for a safety needle. The inner sliding sleeve tension detection device comprises a positioning mould and an inner sleeve tension detection mechanism, the positioning mould comprises a fixing assembly and a sheath transfer assembly, the fixing assembly can press the safety needle, and the sheath transfer assembly can clamp and transfer the needle sheath; the inner sleeve tension detection mechanism comprises an inner sleeve tension detection unit; the inner sleeve tension detection unit comprises an inner sleeve pull block and a tension sensor, the inner sleeve pull block is connected with the push plate through the tension sensor, and the inner sleeve pull block and the push plate are arranged on the lifting seat in a front-back sliding mode. The positioning mould can act on the safety needle, stable positioning of the safety needle can be achieved, the needle sheath can be clamped and transferred for avoiding, the tension detection requirement of the inner sliding sleeve of the safety needle is met, automatic tension detection of the inner sliding sleeve is achieved, detection is convenient and rapid, the detection is not affected by human factors, and the detection efficiency is improved. The tension detection efficiency and quality of the inner sliding sleeve of the safety needle are improved, and the device can be widely applied to tension detection of inner sliding sleeves of batch safety needles.

Description

Technical Field

[0001] The invention relates to an inner 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 22-Figure 24 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 inner sleeve of the safety needle can only rely on manual pulling and sampling, which has the following shortcomings: first, the tension test efficiency of the inner 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 inner 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 inner sleeve of the safety needle is needed, which can replace manual sampling to complete the automated tension test of the inner 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 inner sliding sleeve of a safety needle.

[0008] The technical solution of the present invention to solve the above technical problems is as follows: a device for detecting the inner sleeve tension of a safety needle, comprising a positioning jig for carrying the safety needle and an inner sleeve tension detection mechanism for detecting the inner sleeve tension of the safety needle; the positioning jig comprises a positioning frame, a fixing assembly and a sheath transfer assembly arranged on the positioning frame, the positioning frame is also provided with a positioning structure for positioning the safety needle, the fixing assembly can press the safety needle, and the sheath transfer assembly can clamp and transfer the needle sheath of the safety needle; the inner sleeve tension detection mechanism comprises an inner sleeve detection frame, an inner sleeve 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 inner sleeve tension detection unit is located above the positioning jig, and the lifting seat is arranged on the inner sleeve detection frame through the lifting drive mechanism;

[0009] The inner sleeve tension detection unit comprises an inner sleeve pull block and a tension sensor, the inner sleeve pull block is connected to the push plate through the tension sensor, and the inner sleeve pull block and the push plate are arranged on the lifting seat to slide forward and backward.

[0010] The beneficial effects of the present invention are as follows: the fixed assembly of the positioning jig can press the safety needle placed thereon, the sheath transfer assembly can clamp and transfer the needle sheath, and prepare for the tension detection of the inner sleeve. After that, under the action of the lifting drive mechanism, the lifting seat can be lowered, and the inner sleeve pull block of the inner sleeve tension detection unit is lowered and acts on the inner sleeve of the safety needle. Under the action of the tension drive mechanism, the push plate moves forward, the push plate moves forward and pulls the inner sleeve pull block forward, thereby pulling the inner sleeve, and the tension sensor can detect the tension when the inner sleeve is pulled. The present invention has a simple structure, the fixed assembly of the positioning jig can act on the fixed part of the safety needle, realize the stable positioning of the safety needle, the sheath transfer assembly can clamp and transfer the needle sheath, meet the requirements of the tension detection of the inner sleeve of the safety needle, thereby realizing the automatic tension detection of the inner sleeve, the detection is convenient and fast, not affected by human factors, and the tension detection efficiency and quality of the inner sleeve of the safety needle are improved, and it can be widely used in the tension detection of the inner sleeve of batch safety needles.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the inner sleeve 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.

[0013] The beneficial effect of adopting the above further scheme is that the inner sleeve of the safety needle may not be pulled during the tension test, such as the inner sleeve is glued or stuck to the needle handle during the assembly process of the safety needle. In this case, if the inner sleeve is forcibly pulled, the safety needle or the tension detection component such as the tension sensor of the inner sleeve detection unit will be damaged. The electromagnet is connected to the tension sensor through a connector, and the connector cooperates with the electromagnet by magnetic attraction. When the maximum tension required by the inner sleeve exceeds the suction force of the electromagnet, that is, when the inner 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, and the tension sensor and the inner sleeve pull block do not move forward, and the inner sleeve will not be forcibly pulled, thereby avoiding damage to the tension detection component. When the positioning mold positions multiple safety needles, the corresponding safety needles are set in the inner sleeve tension detection unit independently of each other and will not interfere with each other. If there is an inner sleeve that cannot be pulled, it will not affect the tension detection of the corresponding inner sleeve of the safety needle by other tension detection units.

[0014] Furthermore, the fixed assembly includes an assembly support portion and a fixed pressure block arranged on the assembly support portion and capable of acting on the safety needle; the fixed pressure block has an original position and a pressing position, and the fixed pressure block in the original position can be moved to the upper side corresponding to the pressing position by moving in the front-to-back and left-to-right directions, and then moved to the pressing position by moving in the up-to-down directions 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-to-down directions to release the safety needle, and then returned to the original position by moving in the front-to-back and left-to-right directions.

[0015] The beneficial effect of adopting the above further scheme is that when the inner 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 inner sleeve pulling block can be moved down to the inner sleeve position and act on the inner sleeve under the action of the lifting drive mechanism, and the inner sleeve is pulled forward under the action of the tension drive mechanism, so that the first buckle of the inner sleeve can be disengaged from the first slot of the needle handle, and the first buckle moves between the first slot and the second slot. The tension sensor detects the tension when the inner sleeve is pulled, and after the inner sleeve tension test is completed, the fixed pressure block can return to the original position, which is convenient for the discharge of the safety needle after the test and the loading of the safety needle waiting for the test. The conversion of the fixed pressure block between the original position and the clamping position is limited, which is not only conducive to the loading and unloading of the safety needle, but also does not damage the safety needle when the safety needle is pressed and released, ensuring the quality and efficiency of the tension test of the inner sleeve of the safety needle.

[0016] 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 arranged on the positioning frame for sliding up and down, the fixed slide is arranged on the fixed frame for sliding forward and backward, the fixed bar is arranged on the fixed slide for sliding left and right, the fixed pressure block is arranged on the fixed bar, the fixed track plate is arranged on the fixed frame, and the movable track plate is arranged 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.

[0017] 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 track plate will move forward. Since the movable track plate is set on the fixed slide plate to slide 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, the movable track plate will no longer move forward due to the influence of the fixed track plate, and the fixed pressure block can move right forward to above the pressing position. The movable track plate will move downward again, which 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 to slide up and down, the fixed frame moves downward, and the fixed pressure block moves downward. When the locking mechanism is in place, the stop pin assembly is in a locked position with the stopper being able to move upward, and the stopper being able to move upward can be used to lock the stopper and the safety pin. All needles disengage and rise 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 needle that has completed the tension test can be discharged, and the safety needle to be tested can be loaded onto the positioning rack and wait for testing.

[0018] Furthermore, the sheath transfer assembly includes a sheath claw frame, a sheath transfer drive mechanism for driving the sheath claw frame to move forward and backward, a sheath clamping unit arranged on the sheath claw frame, and a sheath clamping drive mechanism for driving the sheath clamping unit. The sheath claw frame is arranged on the positioning frame to slide forward and backward, the sheath clamping unit can clamp or release the needle sheath under the action of the sheath clamping drive mechanism, and the sheath claw frame can drive the needle sheath to move forward or backward under the action of the sheath transfer drive mechanism.

[0019] The beneficial effect of adopting the above further scheme is that the needle shield is located in front of the inner sliding sleeve. Since the needle shield of the safety needle will affect the forward movement of the inner sliding sleeve of the safety needle, it is necessary to move the needle shield before performing the tension test. The needle shield can be clamped by the shield transfer assembly and moved forward to a position where it does not affect the tension test of the inner sliding sleeve. The needle shield is clamped by the shield clamping unit and driven forward by the shield transfer driving mechanism. After the tension test of the inner sliding sleeve is completed, the needle shield can be clamped by the shield clamping unit and then driven backward and reset by the shield transfer driving mechanism.

[0020] Furthermore, the sheath clamping unit includes a pair of sheath claws located on both sides of the needle sheath, the middle parts of the sheath claws are hinged on the sheath claw frame, and a claw spring is provided between the upper parts of the pair of sheath claws; the sheath clamping drive mechanism includes a top block supporting plate and a top block arranged on the top block supporting plate, the top block is correspondingly arranged below the sheath clamping unit, and the top block is provided with a support head capable of propping up the lower parts of the pair of sheath claws.

[0021] The beneficial effect of adopting the above further scheme is that the upper part of the sheath clamping jaws is the clamping position. Under normal circumstances, the pair of sheath clamping jaws are in an open state under the action of the clamping jaw spring and will not interfere with the taking and placing of the safety needle. When the needle sheath needs to be moved before the inner sleeve tension detection, the top block support plate moves up under power drive, and the support head can be inserted between the lower parts of the pair of sheath clamping jaws, so that the lower parts of the pair of sheath clamping jaws are separated, and the upper parts of the pair of sheath clamping jaws compress the clamping jaw spring, thereby clamping the needle sheath of the safety needle, preparing for the transfer of the needle sheath of the safety needle.

[0022] Furthermore, the positioning mold also includes a fork mechanism, which includes a fork, which is rotatably arranged on the positioning frame, and one end of the fork is provided with a first shifting groove opening that can drive the fixing assembly to compress the safety needle, and the other end of the fork is provided with a second shifting groove opening that can drive the sheath transfer assembly to clamp the needle sheath.

[0023] The beneficial effect of adopting the above further solution is that the drive of the fixed assembly and the sheath transfer assembly can be set separately, each having an independent power drive, and of course, it is also possible to use a single power drive to drive the fixed assembly and the sheath transfer assembly at the same time through the above fork mechanism. Using a single power can simultaneously meet the needs of the fixed assembly to compress the safety needle and the sheath transfer assembly to clamp the needle sheath of the safety needle, reducing the number of drive components and reducing costs.

[0024] Furthermore, the limit pin assembly includes a pin rack, an overhead movably arranged on the pin rack and a latch, the pin rack is arranged on the fixed slide, the movable track plate is provided with a pin slot, a latch spring is provided between the latch and the fixed slide, under the action of the latch spring, the latch 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, a pin push groove matching the pin push rod is provided at the lower part of the overhead, a pin limiting ring is provided at the upper part of the overhead, an overhead spring is mounted on the overhead between the pin limiting ring and the pin rack, and a limit plate capable of positioning the pin limiting ring is provided on the positioning frame.

[0025] The beneficial effect of adopting the above further scheme is that when the clamping position latch is inserted into the pin slot, the fixed pressure block needs to return to the original position from the clamping position, and the limit pin assembly can also ensure that the fixed pressure block rises first, and then moves in the left and right, front and back directions. Specifically, when resetting, the movable track plate moves upward under the action of power drive. Since the latch is inserted in the pin slot, the pin rack is fixedly installed on the fixed slide plate, and the fixed slide plate is slidably arranged on the fixed frame forward and backward, so it will drive the fixed frame to move upward, and the fixed pressure block will first move up and away from the needle handle and / or wing of the safety needle. As the pin rack moves upward, the pin limiting ring contacts the limiting plate of the positioning frame, the overhead force compresses the overhead spring to move downward, the pin lever moves left, the latch compresses the latch spring, the latch disengages from the pin slot, and the fixed pressure block moves up 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, the fixed pressure block moves left and backward, and the fixed pressure block can return to the original position from the clamping position.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The beneficial effect of adopting the above further scheme is that the second limit column can move in the second inclined slot hole. Under the action of the second linkage member, when the movable track plate moves in the up and down directions, the fixed pressure block can move in the front and back directions, thereby realizing the power transmission from the up and down movement of the movable track plate to the front and back movement of the fixed pressure block.

[0030] 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.

[0031] The beneficial effect of adopting the above further scheme is that the wing bracket can support the wing of the safety needle and the needle handle around the wing. When the fixed pressure block of the fixed assembly acts on the needle handle and / or the wing to compress the safety needle, the wing bracket can cooperate with the fixed pressure block of the fixed assembly to achieve the compression and positioning of the safety needle, and the sheath groove can achieve the support and positioning of the needle sheath of the safety needle to meet the needs of inner sleeve tension detection of the safety needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0034] Figure 3 It is a structural schematic diagram of angle 1 of the inner sleeve tension detection mechanism of the present invention;

[0035] Figure 4 It is a structural schematic diagram of angle 2 of the inner sleeve tension detection mechanism of the present invention;

[0036] Figure 5 This is a structural schematic diagram of angle 1 of the inner sleeve tension detection unit of the present invention;

[0037] Figure 6 This is a structural schematic diagram of angle 2 of the inner sleeve tension detection unit of the present invention;

[0038] Figure 7 This is a structural schematic diagram of angle 3 of the inner sleeve tension detection unit of the present invention;

[0039] Figure 8 It is a structural schematic diagram of the placement state of the safety needle of the positioning fetus of the present invention;

[0040] Fig. 9 It is a top view schematic diagram of the safety needle of the present invention in the placement state;

[0041] Fig.10 It is a three-dimensional structural schematic diagram of the safety needle of the present invention in a placement state;

[0042] Fig.11It is a structural schematic diagram of the safety needle positioning state of the present invention;

[0043] Fig.12 It is a top view schematic diagram of the safety needle positioning state of the present invention;

[0044] Fig.13 It is a three-dimensional structural schematic diagram of the safety needle positioning state of the present invention;

[0045] Fig.14 It is a structural schematic diagram of the fixed pressing block of the fixed assembly of the present invention in the original position;

[0046] Fig.15 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;

[0047] Fig.16 It is a schematic diagram of the structure of the overhead and the latch of the present invention;

[0048] Fig.17 It is a structural schematic diagram of the fixed pressing block of the fixed assembly of the present invention in the pressing position;

[0049] Fig.18 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;

[0050] Fig.19 This is a structural schematic diagram of the shield clamping assembly of the present invention in the state of clamping the needle shield at angle 1;

[0051] Fig. 20 It is a structural schematic diagram of the shield clamping assembly of the present invention clamping the needle shield in the second state;

[0052] Fig.21 It is a structural schematic diagram of the shield clamping assembly of the present invention in a state where the needle shield is released;

[0053] Fig. 22 is a schematic diagram of the structure of a safety needle;

[0054] Fig.23 This is a schematic diagram of the structure of the safety needle when the outer sleeve is pulled out;

[0055] Fig.24 It is a schematic diagram of the split structure of the safety needle;

[0056] 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, front baffle; 131, double-wing baffle; 132, shift fork; 133, main shaft; 134, first shift notch; 135, second shift notch; 136, driving block; 137, limit plate; Z00, safety needle; Z01, needle handle; Z02, first card slot; Z03, second card slot; Z04, wing;

[0057] 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; 300, inner sleeve detection frame; 301, inner sleeve pull block; 302, tension sensor; 303, connector; 304, electromagnet; 305, lifting seat; 306, push plate; 307, limit slot; 308, lifting drive cylinder; 309, servo motor; 310, lead screw; 311, lead screw nut; 312, limit slide plate; 313, limit drive cylinder; 314, lifting plate; 315, lifting drive cylinder; 316, transfer drive cylinder; 317, transfer drive member; 318, pressure rod. DETAILED DESCRIPTION

[0058] 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.

[0059] like Figure 1-Figure 21As shown, a safety needle inner sleeve tension detection device comprises a positioning jig for carrying a safety needle Z00 and an inner sleeve tension detection mechanism for detecting the tension of the inner sleeve Z05 of the safety needle Z00; the positioning jig comprises a positioning frame 100, a fixing assembly and a sheath transfer assembly arranged on the positioning frame 100, the positioning frame 100 is also provided with a positioning structure for positioning the safety needle Z00, the fixing assembly can press the safety needle Z00, and the sheath transfer assembly can clamp and transfer the needle sheath Z11 of the safety needle Z00; the inner sleeve tension detection mechanism comprises an inner sleeve detection frame 300, an inner sleeve tension detection frame 301, an inner sleeve tension detection frame 302, an inner sleeve tension detection frame 303, an inner sleeve tension detection frame 304, an inner sleeve tension detection frame 305, an inner sleeve tension detection frame 306, an inner sleeve tension detection frame 307, an inner sleeve tension detection frame 308, an inner sleeve tension detection frame 309, an inner sleeve tension detection frame 301 ...1, an inner sleeve tension detection frame 302, an inner sleeve tension detection frame 303, an inner sleeve tension detection frame 304, an inner sleeve tension detection frame 305, an inner sleeve tension detection frame 306, an inner sleeve tension detection frame 307, an inner sleeve tension detection frame 308, an inner sleeve tension detection frame 309, an inner sleeve tension detection frame 309, an inner sleeve tension detection frame 309, an inner sleeve tension detection frame 301, an inner sleeve tension detection frame 301, an inner sleeve tension detection frame 302, an inner sleeve tension detection frame 303, an inner sleeve tension detection frame 304, an inner sleeve tension detection frame 305, an inner sleeve tension detection frame 306, The inner sleeve tension detection unit comprises an inner sleeve tension detection unit, a lifting seat 305, a push plate 306, a lifting drive mechanism for driving the lifting seat 305 to move up and down, and a tension drive mechanism for driving the push plate 306 to move forward and backward. The inner sleeve tension detection unit is located above the positioning mold, and the lifting seat 305 is arranged on the inner sleeve detection frame 300 through the lifting drive mechanism; the inner sleeve tension detection unit comprises an inner sleeve pulling block 301 and a tension sensor 302, the inner sleeve pulling block 301 is connected to the push plate 306 through the tension sensor 302, and the inner sleeve pulling block 301 and the push plate 306 are arranged on the lifting seat 305 to slide forward and backward.

[0060] The inner sleeve tension detection unit further includes an electromagnet 304 and a connector 303 that is magnetically matched with the electromagnet 304. The electromagnet 304 is disposed on a push plate 306, and the electromagnet 304 is connected to the tension sensor 302 through the connector 303. The push plate 306 is provided with a limit groove 307 that constrains the connector 303. One end of the connector 303 is connected to the tension sensor 302, and the other end of the connector 303 can move in the limit groove 307.

[0061] The fixed assembly includes an assembly support portion and a fixed pressure block 101 arranged on the assembly support portion and capable of acting on the needle handle Z01 and / or wing Z04 of the safety needle Z00; the fixed pressure block 101 has an original position and a pressing position. The fixed pressure block 101 in the original position can be moved to the top of the corresponding pressing position by moving in the front-to-back and left-to-right directions, and then moved to the pressing position by moving in the up-to-down directions to press the safety needle Z00; the fixed pressure block 101 in the pressing position can be moved out of the pressing position by moving in the up-to-down directions to release the safety needle Z00, and then returned to the original position by moving in the front-to-back and left-to-right directions.

[0062] The lifting seat 305 is also provided with a pressure rod 318 for pressing the safety needle, and the pressure rod 318 is located at the rear side of the inner sleeve pull block 301. The pressure rod 318 can act on the wing of the safety needle or on the fixed pressure block 101 pressed on the safety needle, further ensuring the pressing stability of the safety needle Z00.

[0063] 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 through 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.

[0064] 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. The limit pin assembly in the clamping position is locked with the movable track plate 105. After the fixed pressure block 101 clamps the safety needle Z00, the inner sleeve Z05 of the safety needle Z00 can be tested for tension.

[0065] The fixed pressing block 101 returns to the original position from the pressing position, the movable track plate 105 moves up, and 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, and the fixed pressing block 101 releases the safety needle Z00 and moves up. As the movable track plate 105 moves up, the limit pin assembly and the movable track plate 105 are unlocked, and under the action of the first linkage, the fixed bar 104 moves to the left, and 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. When the fixed pressing block 101 returns to the original position, the safety needle Z00 after detection can be unloaded or the safety needle Z00 to be detected can be loaded.

[0066] The sheath transfer assembly includes a sheath claw frame 120, a sheath transfer driving mechanism for driving the sheath claw frame 120 to move forward and backward, a sheath clamping unit arranged on the sheath claw frame 120, and a sheath clamping driving mechanism for driving the sheath clamping unit. The sheath claw frame 120 is arranged on the positioning frame 100 to slide forward and backward through a guide rod. The sheath clamping unit can clamp or release the needle sheath Z11 under the action of the sheath clamping driving mechanism. The sheath claw frame 120 can drive the needle sheath Z11 to move forward or backward under the action of the sheath transfer driving mechanism.

[0067] The sheath clamping unit includes a pair of sheath clamping claws 121 located on both sides of the needle sheath Z11, the middle part of the sheath clamping claws 121 is 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 124 support plate and a top block 124 arranged on the top block 124 support plate, 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 up the lower part of the pair of sheath clamping claws 121.

[0068] The shield transfer drive mechanism includes a drive block 136 and a transfer drive cylinder 316 for driving the block 136 to move forward and backward. The drive block 136 is arranged on the shield claw frame 120. The transfer drive cylinder 316 can be arranged on the positioning frame 100 or the inner sleeve detection frame 300. After the shield clamping claw 121 clamps the needle shield Z11, the transfer drive cylinder 316 can drive the drive block 136 to move forward, thereby driving the shield clamping claw 121 to move forward, and reserving space for the forward movement of the inner sliding sleeve Z05 of the safety needle Z00; when reset is required, the transfer drive cylinder 316 can electrically drive the block 136 to move backward, and the shield clamping claw 121 moves backward, so that the needle shield Z11 of the safety needle Z00 can be reset. The transfer drive cylinder 316 is arranged on the inner sleeve detection frame 300 , such as being arranged on the lifting seat 305 of the inner sleeve detection frame 300 . A transfer drive member 317 is arranged on the piston rod of the transfer drive cylinder 316 . The transfer drive member 317 is provided with a slot that can cooperate with the drive block 136 .

[0069] The sheath clamping driving mechanism further comprises a driving top plate 125 , wherein 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 .

[0070] The positioning mold also includes a fork mechanism, which includes a fork 132. The fork 132 is rotatably arranged on the positioning frame 100. One end of the fork 132 is provided with a first slot 134 that can drive the fixing assembly to compress the safety needle Z00, and the other end of the fork 132 is provided with a second slot 135 that can drive the sheath transfer assembly to clamp the needle sheath Z11. The shift fork 132 is arranged on the main shaft 133, and the main shaft 133 is rotatably arranged on the positioning frame 100. The first shifting slot 134 can cooperate with the movable track plate 105 of the fixed assembly, and a track plate shifting shaft cooperating with the first shifting slot 134 can be arranged on the movable track plate 105. When the first shifting slot 134 swings upward or downward, it can drive the movable track plate 105 of the fixed assembly to move up or down, thereby achieving the purpose of releasing the safety needle Z00 or tightening the safety needle Z00 of the fixed assembly; the second shifting slot 135 can cooperate with the driving component of the sheath transfer assembly, such as the second shifting slot 135 can cooperate with the driving top plate 125 of the sheath transfer assembly. When the second shifting slot 135 swings downward or upward, the sheath transfer assembly can release the needle sheath Z11 or hold the needle sheath Z11 tightly.

[0071] The positioning jig located below the inner sleeve tension detection unit has 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 inner sleeve pull block 301 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 inner sleeve pull block 301. When the inner sleeve pull block 301 is pulled forward, the rear end plate of the inner sleeve pull block 301 can act on the rear end surface of the inner sleeve Z05 to drive the inner sleeve Z05 to move forward.

[0072] 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 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 137 capable of aligning the pin limiting ring 114 is provided on the positioning frame 100.

[0073] 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.

[0074] 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 set on the movable track plate 105, and the first limiting column 118 is set on the fixed bar 104. The first oblique slot hole 116 is inclined rightward from bottom to top. The first oblique slot hole 116 cooperates with the first limiting column 118, and when the movable track plate 105 moves in the up and down directions, the fixed bar 104 carrying the fixed pressure block 101 can move in the left and right directions.

[0075] 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 limit position on the front side 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.

[0076] 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.

[0077] The inner sleeve detection frame 300 is also provided with a limiting assembly for limiting the top of the positioning frame 100, and the limiting assembly includes a limiting slide 312 and a limiting drive cylinder 313 for driving the limiting slide 312 to move forward and backward. The limiting slide 312 is slidably arranged on the inner sleeve detection frame 300. When the inner sleeve Z05 of the safety needle Z00 is subjected to tension testing, the safety needle Z00 needs to be pressed by the positioning jig, and the positioning jig will be subjected to an upward driving force. The limiting slide 312 is arranged on the inner sleeve detection frame 300. The limiting slide 312 can extend backward under the action of the limiting drive cylinder 313 to act on the top of the positioning frame 100, and can balance the force of the positioning jig, and avoid the driving force acting on the turntable used to drive the positioning jig to rotate at each station, which affects the rotation of the positioning jig at each station.

[0078] The inner sleeve inspection frame 300 is also provided with a lifting drive mechanism for driving the positioning jig to press the installation needle and clamp and transfer the inner sleeve. The lifting drive mechanism includes a lifting plate 314 and a lifting drive cylinder 315 for driving the lifting plate 314 to move up and down. The driving power for pressing the safety needle Z00 and clamping the needle sheath Z11 on the positioning jig can be set on the inner sleeve inspection frame 300, which can reduce the weight of the positioning jig transferred at each station and reduce energy consumption. After the positioning jig is in place, the lifting drive mechanism is located below the positioning jig, and the lifting plate 314 moves up to act on the driving top plate 125, and moves down away from the driving top plate 125, thereby realizing the driving of the fixed pressure block 101 and the sheath clamping claw 121 of the positioning jig.

[0079] The tension driving mechanism includes a servo motor 309, a lead screw 310 and a lead screw nut 311. The lead screw 310 is rotatably arranged on the lifting seat 305. The lead screw nut 311 is connected to the push plate 306. The lead screw 310 is connected to the output shaft of the servo motor 309. The lead screw 310 rotates, and the lead screw nut 311 moves along the axial direction of the lead screw 310, so as to realize the movement of the push plate 306 in the front-rear direction.

[0080] The lifting drive mechanism includes a lifting drive cylinder 308, which is arranged on the inner sleeve detection frame 300, and the piston rod of the lifting drive cylinder 308 is connected to the lifting seat 305. Under the action of the lifting drive cylinder 308, the lifting seat 305 can carry the inner sleeve pull block 301 up and down.

[0081] 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 inner sleeve Z05 of the safety needle Z00. When there are multiple safety needles Z00 on the positioning rack 100, the positioning structure can ensure that the safety needles Z00 are placed neatly, and the safety needles Z00 do not interfere with each other, thereby improving the efficiency and quality of the tension detection of the inner sleeve Z05 of the safety needle Z00.

[0082] The positioning frame 100 also includes a front baffle 130 that can limit the forward movement of the needle shield Z11. When the inner sleeve Z05 is subjected to a tension test, the needle shield Z11 that needs to clamp the safety needle Z00 needs to move forward, but the forward movement distance cannot be excessive, otherwise the inner sleeve Z05 cannot be reset after the tension test. The front baffle 130 located in front of the safety needle Z00 can limit the forward movement distance of the needle shield Z11.

[0083] The positioning frame 100 also includes a double-wing baffle 131 for limiting the wing Z04, and an avoidance notch is provided on the double-wing baffle 131. The avoidance notch can avoid the inner sleeve Z05 and the outer sleeve Z09, and can also avoid the inner sleeve pull block 301 to avoid interfering with the tension detection of the inner sleeve Z05 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 tension test of the inner sleeve Z05 of the safety needle Z00 is generally performed after the tension test of the outer sleeve Z09 of the safety needle Z00, that is, after the outer sleeve Z09 is pulled out, so the inner sleeve pulling block 301 can directly act on the inner sleeve Z05 of the safety needle Z00.The positioning jig is located below the inner sleeve tension detection unit. The fixed pressure block 101 is at the original position, that is, at the left rear side of the wing Z04 of the safety needle Z00. The lifting drive cylinder 315 is actuated, and the lifting plate 314 moves up to lift the driving top plate 125. The top block 124 moves up under the action of the driving top plate 125. The support head is inserted between the lower parts of the sheath clamping claws 121 to open the lower parts of a pair of sheath clamping claws 121. The upper parts of a pair of sheath clamping claws 121 clamp the needle sheath Z11. The transfer drive cylinder 316 is actuated to drive the driving block 136 to move forward, and the sheath claw frame 120 moves forward. The sheath clamping claw 121 can clamp the needle sheath Z11 and move forward, so as to prepare for the tension detection of the inner sleeve Z05 and leave space for the movement of the inner sleeve Z05. At the same time as the movable track plate 105 moves upward, under the action of the shift fork 132, 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 pressure block 101 to move rightward. 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 up and down relative to the positioning frame 100 but not forward and backward, 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 limit position on the front side of the second oblique slot hole 117, the fixed pressure block 101 moves rightward. After the movable track plate 105 moves forward to the upper side of the clamping position, it is restricted by the fixed track plate 106 and 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, so that the fixed pressing block 101 moves downward to the clamping position to clamp 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 limiting pin assembly is locked with the movable track plate 105, so that the safety needle Z00 is clamped, the lifting drive cylinder 308 is actuated, the lifting seat 305 descends, the inner sleeve pull block 301 descends to act on the inner sliding sleeve Z05 of the safety needle Z00, and the servo motor 309 is actuated. When the lead screw 310 rotates, the lead screw nut 311 drives the push plate 306 to move forward, pulling the inner sleeve Z05 forward, and the first buckle Z06 of the inner sleeve Z05 can be disengaged from the first slot Z02 on the needle handle Z01 of the safety needle Z00 and move forward, and the first buckle Z06 of the inner sleeve Z05 can be moved between the first slot Z02 and the second slot Z03 of the needle handle Z01 to avoid excessive pulling of the inner sleeve Z05 and inability to reset it. The tension sensor 302 detects the tension pulling the inner sleeve Z05; if the inner sleeve Z05 of the safety needle Z00 on the positioning jig cannot be pulled forward normally, the connector 303 of the corresponding inner sleeve tension detection unit will be disconnected from the electromagnet 304, and the corresponding inner sleeve pull block 301 will not move forward to forcibly pull the inner sleeve Z05.The tension value detected by the tension sensor 302 is the force when the first buckle Z06 of the inner sleeve Z05 is disengaged from the first slot Z02 on the needle handle Z01 of the safety needle Z00. The inner sleeve is generally pulled forward by 3-6 mm, and the tension value is generally 3-15N. The tension value detected by the tension sensor 302 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 305 and the push plate 306 are reset. When the fixed pressure block 101 needs to be reset, the lifting drive cylinder 315 is reset, the lifting plate 314 moves down, and the driving top plate 125 moves down without support. The top block 124 moves down under the action of the driving top plate 125, and the support head leaves the sheath clamping claw 121. A pair of sheath clamping claws 121 open between the upper parts under the action of the clamping claw spring 122 to release the needle sheath Z11, and the driving top plate 125 moves down. Under the action of the fork 132, the movable track plate 105 moves up. Due to the insertion and cooperation of the pin 109 and 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 to above it. As the fixed slide plate 103 moves up, the top of the pin limit ring 114 at the top of the overhead 108 contacts The limit plate 137 and the overhead 108 are compressed by the limit plate 137 and move downward, and the pin slot 115 moves downward. As the overhead 108 moves downward, the pin lever 113 moves upward out of the pin slot 115, and the latch 109 moves leftward and disengages from the pin slot 110 to act on the right side of the movable track plate 105. As the movable track plate 105 continues to move upward, the fixed bar 104 is fixed with the first inclined slot hole 116 and the first limit column 118. The fixed pressure block 101 moves to the left. With the cooperation of the second inclined 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 103 to move backward, the fixed bar 104 and the fixed pressure block 101 on the fixed slide 103 move backward, the fixed pressure block 101 moves to the left and back to the original position, and the fixed pressure block 101 releases the safety needle Z00. The fixed assembly of the positioning mold of the present invention can act on the fixed part of the safety needle Z00 to achieve stable positioning of the safety needle Z00, and the sheath transfer assembly can clamp and transfer the needle sheath Z11 to prevent the needle sheath Z11 from interfering with the pulling out of the inner sleeve Z05, so as to prepare for the automated tension detection of the inner sleeve Z05. The automated tension detection of the inner sleeve Z05 is convenient and fast, which improves the tension detection efficiency and quality of the inner sleeve Z05 of the safety needle Z00.

[0085] 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 inner sleeve tension detection device, characterized in that: It comprises a positioning jig for carrying a safety needle (Z00) and an inner sleeve tension detection mechanism for detecting the tension of an inner sliding sleeve (Z05) of the safety needle (Z00); The positioning jig comprises a positioning frame (100), a fixing assembly and a sheath transfer assembly arranged on the positioning frame (100); the positioning frame (100) is also provided with a positioning structure for positioning the safety needle (Z00); the fixing assembly can press the safety needle (Z00); and the sheath transfer assembly can clamp and transfer the needle sheath (Z11) of the safety needle (Z00); The inner sleeve tension detection mechanism comprises an inner sleeve detection frame (300), an inner sleeve tension detection unit, a lifting seat (305), a push plate (306), a lifting drive mechanism for driving the lifting seat (305) to move up and down, and a tension drive mechanism for driving the push plate (306) to move forward and backward, the inner sleeve tension detection unit is located above the positioning mold, and the lifting seat (305) is arranged on the inner sleeve detection frame (300) through the lifting drive mechanism; The inner sleeve tension detection unit comprises an inner sleeve pull block (301) and a tension sensor (302); the inner sleeve pull block (301) is connected to the push plate (306) via the tension sensor (302); the inner sleeve pull block (301) and the push plate (306) are arranged on the lifting seat (305) to slide forward and backward.

2. The inner sleeve tension detection device for a safety needle according to claim 1, characterized in that: The inner sleeve tension detection unit further comprises an electromagnet (304) and a connector (303) capable of magnetically cooperating with the electromagnet (304); the electromagnet (304) is arranged on the push plate (306); and the electromagnet (304) is connected to the tension sensor (302) via the connector (303).

3. The inner sleeve tension detection device for a safety needle according to claim 1 or 2, 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 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.

4. The inner sleeve tension detection device for a safety needle according to claim 3, 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).

5. The inner sleeve tension detection device for a safety needle according to claim 1 or 2, characterized in that: The shield transfer assembly comprises a shield claw frame (120), a shield transfer drive mechanism for driving the shield claw frame (120) to move forward and backward, a shield clamping unit arranged on the shield claw frame (120), and a shield clamping drive mechanism for driving the shield clamping unit. The shield claw frame (120) is arranged on the positioning frame (100) to slide forward and backward. The shield clamping unit can clamp or release the needle shield (Z11) under the action of the shield clamping drive mechanism. The shield claw frame (120) can drive the needle shield (Z11) to move forward or backward under the action of the shield transfer drive mechanism.

6. The inner sleeve tension detection device for a safety needle according to claim 5, characterized in that: The sheath clamping unit comprises 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); 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 comprises a top block (124) support plate and a top block (124) arranged on the top block (124) support plate; the top block (124) is correspondingly arranged below the sheath clamping unit; and a support head capable of propping up the lower parts of the pair of sheath clamping claws (121) is provided on the top block (124).

7. The inner sleeve tension detection device for a safety needle according to claim 1 or 2, characterized in that: The positioning mold further comprises a shift fork mechanism, the shift fork mechanism comprising a shift fork (132), the shift fork (132) being rotatably arranged on the positioning frame (100), one end of the shift fork (132) being provided with a first shifting notch (134) capable of driving the fixing assembly to compress the safety needle (Z00), and the other end of the shift fork (132) being provided with a second shifting notch (135) capable of driving the sheath transfer assembly to clamp the needle sheath (Z11).

8. The inner sleeve tension detection device for a safety needle according to claim 4, characterized in that: The limit pin assembly comprises a pin frame (107), a pin (108) movably arranged on the pin frame (107) and a latch (109); the pin frame (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 latch (109) can act on the side of the movable track plate (105) or be inserted into the movable track plate (105). In the pin slot (110), a pin lever (113) is provided on the latch pin (109), a pin slot (115) matching with the pin lever (113) is provided at the lower portion of the overhead pin (108), a pin limiting ring (114) is provided at the upper portion 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 (137) capable of positioning the pin limiting ring (114) is provided on the positioning frame (100).

9. The inner sleeve tension detection device for a safety needle according to claim 4, 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 inner sleeve tension detection device for a safety needle according to claim 1 or 2, characterized in that: The positioning structure comprises a wing bracket (127) at a wing (Z04) for positioning the safety needle (Z00) and a sheath notch (128) for positioning the needle sheath (Z11) of the safety needle (Z00).

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