Material shortage detection device of blood taking needle assembling machine

Abstract

The utility model discloses a blood taking needle assembling machine material shortage detection device which comprises a positioning tool arranged on a conveying mechanism and a fixing frame arranged above the conveying mechanism in a striding mode, and a plurality of positioning grooves are transversely formed in the upper surface of the positioning tool at intervals. The positioning groove comprises an arc section matched with a needle seat of the intravenous needle and a vertical section allowing a fin of the intravenous needle to vertically extend out, and the positioning groove is used for clamping the needle seat and enabling the fin to vertically face upwards; a plurality of U-shaped groove type photoelectric sensors are arranged at the bottom of the fixing frame, the number of the U-shaped groove type photoelectric sensors is equal to that of the positioning grooves, and the U-shaped groove type photoelectric sensors and the positioning grooves are arranged in a one-to-one correspondence mode. The opening direction of each U-shaped groove type photoelectric sensor faces the corresponding positioning groove, and the light path of each U-shaped groove type photoelectric sensor intersects with the motion trail of the fin in the positioning groove. According to the utility model, the vein needle can be accurately detected, the product yield and the equipment stability are improved, and the manual intervention cost is reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a material shortage detection device for a blood collection needle assembly machine. Background Technology

[0002] In the automated assembly process of blood collection needles, after the materials are conveyed through the feeding trough, the tooling mold driven by the cylinder sequentially completes the processes of clamping, gluing, directional assembly, and unloading. Taking the directional assembly process of intravenous needles as an example, the intravenous needles are vibrated and fed to the conveyor track by the vibrating plate mechanism, and then the cylinder drives the clamp to pick up the intravenous needles from the track and complete the precise assembly with the catheter, realizing fully automated production.

[0003] Currently, existing technologies determine the presence of vein needles in the material channel by configuring a diffuse reflection sensor at the front end of the transmission track and detecting changes in the photosensitive area of ​​the vein needle tail. However, due to the small cross-sectional area of ​​the vein needle tail, this detection method is easily affected by factors such as ambient light, installation angle, and needle reflectivity, leading to frequent false detections and missed detections.

[0004] This defective detection leads to defective products with missing intravenous needles, frequent equipment downtime, and requires production personnel to constantly troubleshoot and clean the detection window. This affects product yield and equipment stability, and increases labor maintenance costs. Therefore, this invention proposes a missing needle detection device for a blood collection needle assembly machine. Utility Model Content

[0005] This application provides a material shortage detection device for a blood collection needle assembly machine, which enables accurate detection of intravenous needles, improves product yield and equipment stability, and reduces manual intervention costs.

[0006] In view of this, this application provides a material shortage detection device for a blood collection needle assembly machine, comprising: a positioning fixture disposed on a conveying mechanism and a fixing frame spanning above the conveying mechanism;

[0007] The upper surface of the positioning fixture is provided with multiple positioning grooves spaced laterally.

[0008] The positioning groove includes an arc segment that mates with the needle hub of the intravenous needle and a vertical segment for the wing of the intravenous needle to extend vertically, for locking the needle hub and keeping the wing vertically upward;

[0009] The bottom of the mounting frame is equipped with multiple U-shaped groove photoelectric sensors;

[0010] The number of the U-shaped groove photoelectric sensors is equal to the number of the positioning grooves, and they are set in a one-to-one correspondence.

[0011] The opening of each U-shaped slot photoelectric sensor faces the corresponding positioning slot, and its optical path intersects with the movement trajectory of the wing in the positioning slot.

[0012] Optionally, the diameter of the arc segment is set to match the diameter of the needle seat.

[0013] Optionally, the inner wall of the vertical section is provided with elastic limiting protrusions for abutting against both sides of the wing to prevent it from tilting.

[0014] Optionally, the number of the positioning fixtures is multiple;

[0015] The positioning fixtures are arranged at equal intervals along the conveying direction.

[0016] Optionally, the fixing frame includes a first column, a second column, and a horizontal beam disposed between the first column and the second column;

[0017] The first column and the second column are located on the left and right sides of the conveying mechanism, respectively;

[0018] The U-shaped groove photoelectric sensor is installed at the bottom of the horizontal beam.

[0019] Optionally, the two ends of the horizontal beam are connected to the first column and the second column respectively via height adjusting screws.

[0020] Optionally, the U-shaped slot photoelectric sensor is mounted on the bottom of the horizontal beam via an adjustable mounting mechanism.

[0021] Optionally, the adjustable mounting mechanism includes a transverse slide rail fixed to the bottom of the horizontal beam, a slider slidably disposed on the transverse slide rail, and a locking screw for fixing the position of the slider;

[0022] The U-shaped groove photoelectric sensor is fixed on the slider;

[0023] The locking screw passes through the slider and engages with the threaded transverse slide rail.

[0024] Optionally, the U-shaped slot photoelectric sensor includes a transmitter and a receiver arranged opposite to each other.

[0025] Optionally, the U-shaped slot photoelectric sensor is a horseshoe-shaped photoelectric gate sensor.

[0026] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: This blood collection needle assembly machine material shortage detection device, by setting a positioning groove on the positioning fixture that is compatible with the needle seat and wing structure of the vein needle, utilizes the precise positioning of the needle seat by the arc segment and the directional guidance of the wing segment by the vertical segment to ensure that the vein needle enters the detection area in a stable posture, completely solving the problem in the prior art that the detection signal is easily interfered with by ambient light, installation angle and needle reflectivity due to the small cross-sectional area of ​​the vein needle tail and unstable positioning; the U-shaped groove photoelectric sensors corresponding to the bottom of the fixing frame adopt direct optical path shielding The detection principle of the baffle is to achieve reliable detection of the winglets in each positioning slot by precisely aligning the opening direction with the movement trajectory of the winglets. Compared with the indirect detection method of existing diffuse reflection sensors that rely on changes in the photosensitive area at the tail, it significantly improves the anti-interference ability and accuracy of the detection signal, effectively avoids the generation of defective products and frequent equipment downtime caused by false detection and missed detection, and reduces the maintenance costs of production personnel in troubleshooting and cleaning the detection window. It provides a reliable guarantee for the stability and efficiency of material shortage detection in the automated assembly process of blood collection needles, and effectively improves the product yield and the automation level of the production line. Attached Figure Description

[0027] Figure 1 This is a front view of the material shortage detection device for the blood collection needle assembly machine in this embodiment of the application;

[0028] Figure 2 This is a top view of the blood collection needle assembly machine material shortage detection device in use according to the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the venous needle after it enters the positioning fixture in an embodiment of this application;

[0030] Figure 4 This is a top view of the vein needle after it enters the positioning fixture in an embodiment of this application;

[0031] Figure 5 This is a front view of the vein needle after it enters the positioning fixture in an embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the positioning tooling in the embodiments of this application;

[0033] Figure 7 This is a front view of the positioning tooling in an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of the detection principle of the U-shaped groove photoelectric sensor in the embodiments of this application;

[0035] The attached figures are labeled as follows:

[0036] 1-Fixed frame, 11-First column, 12-Second column, 13-Horizontal beam, 2-Positioning fixture, 21-Positioning groove, 211-Circular arc segment, 212-Vertical segment, 3-U-shaped groove photoelectric sensor, 4-Conveying mechanism, 5-Vein needle, 51-Needle seat, 52-Wing plate. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] This application provides an embodiment of a material shortage detection device for a blood collection needle assembly machine. Please refer to the following for details. Figures 1 to 8 .

[0041] The missing material detection device for the blood collection needle assembly machine in this embodiment includes: a positioning fixture 2 set on the conveying mechanism 4 and a fixed frame 1 spanning above the conveying mechanism 4. The upper surface of the positioning fixture 2 is provided with a plurality of positioning grooves 21 spaced laterally. The positioning grooves 21 include an arc segment 211 that cooperates with the needle seat 51 of the intravenous needle 5 and a vertical segment 212 for the vertical extension of the wing 52 of the intravenous needle 5, which is used to hold the needle seat 51 and make the wing 52 vertically upward. The bottom of the fixed frame 1 is provided with a plurality of U-shaped groove photoelectric sensors 3. The number of U-shaped groove photoelectric sensors 3 is equal to the number of positioning grooves 21 and they are arranged one-to-one. The opening direction of each U-shaped groove photoelectric sensor 3 faces the corresponding positioning groove 21, and its optical path intersects the movement trajectory of the wing 52 in the positioning groove 21.

[0042] It should be noted that: the missing material detection device of this blood collection needle assembly machine, by setting a positioning groove 21 on the positioning fixture 2 that is adapted to the structure of the needle seat 51 and the wing plate 52 of the vein needle 5, and using the precise positioning of the needle seat 51 by the arc segment 211 and the directional guidance of the wing plate 52 by the vertical segment 212, ensures that the vein needle 5 enters the detection area in a stable posture, which completely solves the problem in the prior art that the detection signal is easily interfered with by ambient light, installation angle and needle reflectivity due to the small cross-sectional area of ​​the tail of the vein needle 5 and unstable positioning; the U-shaped groove photoelectric sensor 3 corresponding to the bottom of the fixing frame 1 adopts direct optical path blocking. The detection principle achieves reliable detection of the wing 52 in each positioning slot 21 by precisely aligning the opening direction with the movement trajectory of the wing 52. Compared with the indirect detection method of existing diffuse reflection sensors that rely on changes in the photosensitive area at the tail, this significantly improves the anti-interference capability and accuracy of the detection signal, effectively avoids the generation of defective products and frequent equipment downtime caused by false detection and missed detection, reduces the maintenance costs of production personnel troubleshooting and cleaning the detection window, and provides a reliable guarantee for the stability and efficiency of material shortage detection in the automated assembly process of blood collection needles, effectively improving product yield and the automation level of the production line.

[0043] The above is Embodiment 1 of a material shortage detection device for a blood collection needle assembly machine provided in this application. The following is Embodiment 2 of the same device. Please refer to the following for details. Figures 1 to 8 .

[0044] The material shortage detection device for the blood collection needle assembly machine in this embodiment includes: a positioning fixture 2 disposed on the conveying mechanism 4 and a fixing frame 1 spanning above the conveying mechanism 4. The upper surface of the positioning fixture 2 has multiple positioning grooves 21 spaced horizontally. Each positioning groove 21 includes an arc segment 211 that mates with the needle seat 51 of the intravenous needle 5 and a vertical segment 212 for the vertical extension of the wing 52 of the intravenous needle 5, used to hold the needle seat 51 and keep the wing 52 vertically upward. The bottom of the fixing frame 1 is provided with multiple U-shaped groove photoelectric sensors 3, the number of which is equal to the number of positioning grooves 21, and they are arranged in a one-to-one correspondence. The opening of each U-shaped groove photoelectric sensor 3 faces its corresponding positioning groove 21, and its optical path intersects the movement trajectory of the wing 52 in the positioning groove 21. Specifically, the conveying mechanism 4 is the conveying mechanism of the blood collection needle assembly machine.

[0045] It is understandable that when the vein needle 5 in the positioning groove 21 is short of material, the corresponding wing 52 does not enter the optical path of the U-shaped groove photoelectric sensor 3, and the sensor outputs a material shortage signal.

[0046] The diameter of the arc segment 211 is matched with the diameter of the needle seat 51. Preferably, the width of the vertical segment 212 can be slightly larger than the thickness of the wing 52.

[0047] The inner wall of the vertical section 212 is provided with elastic limiting protrusions for abutting against both sides of the wing 52 to prevent it from tilting. Specifically, the elastic limiting protrusions are spaced apart along the height direction of the vertical section 212, and the elastic limiting protrusions are made of flexible material (such as medical-grade silicone) to provide lateral support when the wing 52 is extended vertically.

[0048] Specifically, there can be multiple positioning fixtures 2, which are arranged at equal intervals along the conveying direction.

[0049] The fixed frame 1 includes a first column 11, a second column 12, and a horizontal beam 13 disposed between the first column 11 and the second column 12. The first column 11 and the second column 12 are located on the left and right sides of the conveying mechanism 4, respectively, and the U-shaped groove photoelectric sensor 3 is disposed at the bottom of the horizontal beam 13.

[0050] The horizontal beam 13 is connected to the first column 11 and the second column 12 at both ends via height adjustment screws. Specifically, the first column 11 and the second column 12 have multiple height adjustment mounting holes along the vertical direction for cooperating with the height adjustment screws. The height of the horizontal beam 13 can be adjusted by cooperating with the height adjustment screws and the height adjustment mounting holes.

[0051] The U-shaped groove photoelectric sensor 3 is installed at the bottom of the horizontal beam 13 through an adjustable mounting mechanism, thereby realizing the lateral position adjustment of the U-shaped groove photoelectric sensor 3.

[0052] Specifically, the adjustable mounting mechanism includes a transverse slide rail fixed to the bottom of the horizontal beam 13, a slider slidably mounted on the transverse slide rail, and a locking screw for fixing the position of the slider. The U-shaped groove photoelectric sensor 3 is fixed on the slider, and the locking screw passes through the slider and is threadedly engaged with the transverse slide rail.

[0053] The U-shaped groove photoelectric sensor 3 includes a transmitter and a receiver arranged opposite to each other. The optical path formed by the two is located above the positioning groove 21. When the vein needle 5 moves with the positioning fixture 2 to the corresponding U-shaped groove photoelectric sensor 3, it will block the optical path to trigger the detection signal.

[0054] Specifically, the U-shaped slot photoelectric sensor 3 can be a horseshoe-shaped photoelectric gate sensor.

[0055] In practice, the vein needle 5 falls into the positioning groove 21 of the positioning fixture 2 through the conveying mechanism. The conveying mechanism 4 drives the positioning fixture 2 and the vein needle 5 in the positioning groove 21 to move together. Since the wing 52 of the vein needle 5 extends vertically outside the positioning fixture 2, when the wing 52 passes through the middle of the U-shaped groove photoelectric sensor 3, it will detect that there is material passing through and will not alarm. When there is a lack of material, the U-shaped groove photoelectric sensor 3 will issue an alarm signal to indicate that there is a lack of material.

[0056] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A material shortage detection device for a blood collection needle assembly machine, characterized in that, include: A positioning fixture mounted on the conveying mechanism and a fixed frame spanning above the conveying mechanism; The upper surface of the positioning fixture is provided with multiple positioning grooves spaced laterally. The positioning groove includes an arc segment that mates with the needle hub of the intravenous needle and a vertical segment for the wing of the intravenous needle to extend vertically, for locking the needle hub and keeping the wing vertically upward; The bottom of the mounting frame is equipped with multiple U-shaped groove photoelectric sensors; The number of the U-shaped groove photoelectric sensors is equal to the number of the positioning grooves, and they are set in a one-to-one correspondence. The opening of each U-shaped slot photoelectric sensor faces the corresponding positioning slot, and its optical path intersects with the movement trajectory of the wing in the positioning slot.

2. The blood collection needle assembly machine material shortage detection device according to claim 1, characterized in that, The diameter of the arc segment is set to match the diameter of the needle seat.

3. The blood collection needle assembly machine material shortage detection device according to claim 1, characterized in that, The inner wall of the vertical section is provided with elastic limiting protrusions for abutting against both sides of the wing to prevent it from tilting.

4. The blood collection needle assembly machine material shortage detection device according to claim 1, characterized in that, The number of positioning fixtures is multiple; The positioning fixtures are arranged at equal intervals along the conveying direction.

5. The blood collection needle assembly machine material shortage detection device according to claim 1, characterized in that, The fixing frame includes a first column, a second column, and a horizontal beam disposed between the first column and the second column; The first column and the second column are located on the left and right sides of the conveying mechanism, respectively; The U-shaped groove photoelectric sensor is installed at the bottom of the horizontal beam.

6. The blood collection needle assembly machine material shortage detection device according to claim 5, characterized in that, The two ends of the horizontal beam are connected to the first column and the second column respectively via height adjustment screws.

7. The blood collection needle assembly machine material shortage detection device according to claim 5, characterized in that, The U-shaped slot photoelectric sensor is installed at the bottom of the horizontal beam via an adjustable mounting mechanism.

8. The blood collection needle assembly machine material shortage detection device according to claim 7, characterized in that, The adjustable mounting mechanism includes a transverse slide rail fixed to the bottom of the horizontal beam, a slider slidably disposed on the transverse slide rail, and a locking screw for fixing the position of the slider. The U-shaped groove photoelectric sensor is fixed on the slider; The locking screw passes through the slider and engages with the threaded transverse slide rail.

9. The blood collection needle assembly machine material shortage detection device according to claim 1, characterized in that, The U-shaped slot photoelectric sensor includes a transmitter and a receiver that are positioned opposite each other.

10. The blood collection needle assembly machine material shortage detection device according to claim 1, characterized in that, The U-shaped slot photoelectric sensor is a horseshoe-shaped photoelectric gate sensor.

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