Needle tube passage clogging detection mechanism

Abstract

The application relates to the technical field of needle tube detection, and discloses a needle tube channel blockage detection mechanism, which comprises a rack, a bearing seat is arranged on the rack, a detection lens perpendicular to the surface of the bearing seat is arranged on the detection end of a detection assembly, a bearing hole is arranged on the bearing seat, the openings of the bearing hole are formed on the upper and lower surfaces of the bearing seat, the bearing hole is connected with the openings to form a detection channel, the axis of the detection channel is parallel to the axis of the detection lens; a light source part is arranged on the rack, the light source part has a light-emitting surface, and the light-emitting surface is used for assisting the detection lens on the detection assembly and the detection channel in the bearing hole to form a relative-positioned detection light path. The application can avoid the misjudgment risk caused by the failure of a detection system from the source, eliminate the detection interference caused by light dispersion, make the bearing seat and the detection assembly be arranged in a relative position, adapt to the detection requirements of needle tubes of multiple specifications, and then the problems of the injection molding part blocking the needle tube channel can be quickly and stably identified, and the defective products can be prevented from flowing into subsequent processes.

Description

Technical Field

[0001] This invention relates to the field of needle detection technology, specifically a needle channel blockage detection mechanism. Background Technology

[0002] During the production of precision needle-type components, issues such as material overflow, assembly misalignment, and dimensional deviations can easily cause blockages in the internal channels of the needle, directly leading to product failure. Currently, the industry mostly uses methods such as visual inspection with cameras, simple needle probing, or conventional air pressure testing to determine channel patency. These methods are not only inefficient and labor-intensive, but also unable to accurately identify minute blockage defects, failing to meet the demands of large-scale, high-precision production quality control.

[0003] Currently, with the increasing demands for product reliability and consistency in precision manufacturing and medical consumables, needle channel patency has become a core quality acceptance indicator. There is a lack of dedicated needle channel patency detection mechanisms on the market, and existing testing equipment suffers from poor versatility and insufficient accuracy, making it difficult to identify problems with blocked needle channels in injection-molded parts. This can easily lead to defective products flowing into subsequent processes. Summary of the Invention

[0004] This invention provides a needle channel blockage detection mechanism. By adapting the detection component, the carrier, and the light source, it can eliminate detection interference caused by light scattering, while preventing unknown light from interfering with the light source. It can identify the situation of injection molded parts blocking needle channels, thus solving the problem of difficulty in identifying injection molded parts blocking needle channels mentioned in the background art.

[0005] This invention provides the following technical solution: A needle channel plugging detection mechanism includes a frame with a support base on the frame, and further includes: a detection component, the detection end of which is provided with a detection lens perpendicular to the surface of the support base; the support base has a support hole with openings formed on the upper and lower surfaces of the support base, the support hole and the openings communicating to form a detection channel, the axis of the detection channel being parallel to the axis of the detection lens; and a light source, which is mounted on the frame and has a light-emitting surface that emits light towards the opening of the support hole. The detection end of the detection component is adapted to the light source to assist the detection lens on the detection component in forming a relatively aligned detection optical path with the detection channel in the support hole.

[0006] As a preferred embodiment of the present invention, the detection component includes a support platform, a mounting plate is provided on the side of the support platform near the bearing seat, an extension bracket is provided on the mounting plate, a detection camera is fixedly connected to the extension bracket, the detection lens includes a detection head provided on the detection camera, and a driving part is provided inside the support platform to drive the mounting plate to move along the length direction of the support platform.

[0007] As a preferred embodiment of the present invention, the drive includes a slide table slidably disposed on a support platform, a mounting plate fixedly connected to the slide table, a drive motor disposed at one end of the support platform, a lead screw disposed at the output end of the drive motor, a threaded groove adapted to the lead screw disposed on the slide table, and the slide table connected to the lead screw. When the drive motor drives the lead screw to rotate along its own axis, the slide table and the mounting plate move together along the length direction of the support platform.

[0008] As a preferred embodiment of the present invention, the mounting plate is provided with a first telescopic member, and the telescopic end of the first telescopic member is provided with a baffle plate, wherein the telescopic direction of the baffle plate is perpendicular to the moving direction of the mounting plate.

[0009] As a preferred embodiment of the present invention, a second telescopic member is provided on the platform, a connecting plate is provided at the telescopic end of the second telescopic member, a third telescopic member is provided on the connecting plate, the telescopic directions of the second telescopic member and the third telescopic member are perpendicular, and the bearing seat is fixedly connected to the telescopic end of the third telescopic member.

[0010] As a preferred embodiment of the present invention, a clamping member is provided in the bearing hole of the bearing seat, and a guide cylinder is provided on the clamping member, wherein the axis of the guide cylinder is perpendicular to the top surface of the bearing seat.

[0011] As a preferred embodiment of the present invention, a guide frame plate is provided at the opening position of one of the bearing holes on the bearing seat, and the opening direction of the guide frame plate is parallel to the axial direction of the bearing hole.

[0012] As a preferred embodiment of the present invention, the support base is provided with a support plate, the support plate is provided with a guide hole communicating with the support hole, and the guide frame plate is arranged around the position of the guide hole.

[0013] As a preferred embodiment of the present invention, a light-blocking cover is fixedly connected to the light source component, and the opening direction of the light-blocking cover is adapted to the light source component to guide the light emitted by the light source component toward the bearing hole on the bearing base.

[0014] As a preferred embodiment of the present invention, it further includes a base, the top surface of which is provided with a platform, and the stand is fixedly connected to the platform.

[0015] Compared with the prior art, the present invention provides a needle channel blockage detection mechanism with the following advantages: 1. In this needle channel blockage detection mechanism, the light-blocking self-test of the baffle plate is used to quickly verify the effectiveness of the CCD detection system, thus avoiding the risk of misjudgment caused by detection system failure from the source; 2. In this needle channel plugging detection mechanism, the vertical and horizontal displacement calibration of the support seat is achieved through the cooperation of the second and third telescopic components, so that the support seat and the detection component are aligned and set up to meet the detection requirements of multiple specifications of needles. 3. In this needle tube channel blockage detection mechanism, the light source constraint of the light shield can eliminate detection interference caused by light scattering, and at the same time prevent unknown light from interfering with the light source component. In this way, it can quickly and stably identify the problem of the injection molded part blocking the needle tube channel and prevent defective products from flowing into subsequent processes.

[0016] The parts not covered in this device are the same as or can be implemented using existing technologies. This invention can avoid the risk of misjudgment caused by detection system failure from the source, eliminate detection interference caused by light scattering, and make the carrier and detection components aligned to adapt to the detection needs of multi-specification needle tubes. In this way, it can quickly and stably identify the problem of injection molded parts blocking needle tube channels and prevent defective products from flowing into subsequent processes. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0018] Figure 1 This is a schematic diagram of the entire invention; Figure 2 This is a schematic diagram of the support platform of the present invention from a first-view perspective; Figure 3 This is a schematic diagram of the support platform of the present invention from a second perspective; Figure 4 This is a schematic diagram of the detection camera of the present invention; Figure 5 This is a schematic diagram of the stand for the present invention; Figure 6 This is a schematic diagram of the bottom of the support base of the present invention; Figure 7 This is a schematic diagram of the entire support base of the present invention; Figure 8 This is a schematic diagram of the light source component of the present invention.

[0019] In the diagram: 100, base; 101, control box; 200, support platform; 201, drive motor; 202, fixing plate; 203, slide table; 300, mounting plate; 400, extension bracket; 500, detection camera; 501, detection head; 600, shielding plate; 601, first telescopic component; 700, platform; 701, second telescopic component; 702, connecting plate; 703, third telescopic component; 800, bearing seat; 801, clamping component; 802, guide tube; 803, bearing plate; 804, guide frame plate; 805, guide hole; 900, light source component; 901, light shield. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: Reference Figure 1 This invention provides a needle tube channel plugging detection mechanism. Its basic components mainly include a base 100, with an integrated platform on its top surface. A frame 700 is fixedly connected to one side of the platform, and a support platform 200 is provided on the other side of the platform. The support platform 200 serves as the mounting carrier for the detection components. A control box 101 is also provided on the platform of the base 100. The control box 101 contains a power supply box and a programmable control panel. Its internal circuitry is electrically connected to various driving components, detection components, and light source components 900, and is used for controlling the overall operation of the mechanism, setting parameters, and processing detection data in real time.

[0022] Reference Figures 2-8 Specifically, the detection component is used to detect whether the needle channel is blocked. It is mainly composed of a support platform 200, a drive unit, a mounting plate 300, an extension bracket 400, a detection camera 500, and a shielding plate 600. The support platform 200 has a vertical plate structure and is fixedly connected to the platform of the base 100 through a fixing plate 202. A slide 203 is provided on the side of the support platform 200 facing the frame 700. The slide 203 is slidably connected to the support platform 200. A drive motor 201 is installed on one side of the support platform 200. The drive motor 201 can be a servo motor or a rotary cylinder. The output end of the drive motor 201 is coaxially connected to a lead screw. The slide 203 has a threaded groove that matches the lead screw. The lead screw is screwed into the threaded groove, so that a transmission structure is formed between the two.

[0023] Specifically, the mounting plate 300 is a rectangular plate structure and is fixedly connected to the slide table 203, allowing it to move synchronously with the slide table 203. An extension bracket 400 is fixedly connected to the side of the mounting plate 300 away from the support platform 200, and a detection camera 500 is fixedly installed at the end of the extension bracket 400. In this embodiment, the detection camera 500 is an industrial-grade CCD detector, and the detection end of the CCD detector integrates a detection head 501 (i.e., an optical probe). The axis of the optical probe is perpendicular to the top surface of the subsequent support 800, and its core function is signal transmission, transmitting the collected optical signal to the analysis system of the CCD detector, which then determines whether the needle tube channel is blocked. A first telescopic component 601 is also installed below the mounting plate 300. The first telescopic component 601 is a miniature electric push rod, and its telescopic direction is perpendicular to the moving direction of the slide table 203 (i.e., the vertical direction). A baffle plate 600 is fixedly connected to the telescopic end of the first telescopic component 601. The shield 600 is made of acrylic sheet material with excellent light-shielding properties and is used for self-testing of the CCD detection system to verify the alarm sensitivity and anti-interference capability of the detection system.

[0024] Specifically, the platform 700 is a vertical frame structure. The bottom of the platform 700 is fixedly connected to the platform surface of the base 100. A second telescopic component 701 is installed on the vertical side plate of the platform 700. The second telescopic component 701 can be a telescopic cylinder, and its telescopic direction is vertical. A connecting plate 702 is fixedly connected to the telescopic end of the second telescopic component 701. A third telescopic component 703 is installed on the connecting plate 702. The third telescopic component 703 is also a telescopic cylinder, and its telescopic direction is horizontal forward and backward, perpendicular to the telescopic direction of the second telescopic component 701. The support seat 800 is fixedly connected to the telescopic end of the third telescopic component 703, and achieves vertical and horizontal forward and backward displacement with the second telescopic component 701 and the third telescopic component 703. Multiple support holes are opened on the top surface of the support seat 800, which penetrate through the upper and lower surfaces of the support seat 800. The upper and lower openings form a connected detection channel. The axis of the detection channel is parallel to the optical probe axis of the CCD detector, providing optical path conditions for optical detection.

[0025] Specifically, a clamping component 801 is installed in the bearing hole of the bearing seat 800. The clamping component 801 can be an elastic claw structure or a clamping clamp structure, used to center and clamp the needle tube workpiece to ensure that the needle tube channel is coaxial with the detection channel. A guide cylinder 802 is also fixedly connected to the top of the clamping component 801. The axis of the guide cylinder 802 is perpendicular to the top surface of the bearing seat 800, and its inner diameter is slightly larger than the outer diameter of the needle tube workpiece, used to guide the installation of the needle tube workpiece. A bearing plate 803 is also fixedly connected to the bearing seat 800. The bearing plate 803 has a guide hole 805 communicating with the bearing hole. A guide frame plate 804 is arranged around the outside of one of the guide holes 805. The opening direction of the guide frame plate 804 is parallel to the axis of the bearing hole, used to prevent unknown light sources from affecting the bearing hole from the side.

[0026] Specifically, a light source 900 is also installed on the stand 700 to provide directional illumination, mainly composed of the light source 900 and a light shield 901. The light source 900 is a high-brightness cold light source, located directly below the support 800; the emitting surface of the light source 900 faces the lower opening of the support hole on the support 800, forming an upward-facing detection optical path with the optical probe of the CCD detector. A light shield 901 is fixedly connected to the outer side of the emitting surface of the light source 900. The light shield 901 is a trumpet-shaped light-shielding structure, and its opening direction is adapted to the emitting direction of the light source 900, allowing light to only shine into the lower opening of the support hole along the guiding direction of the light shield 901, preventing light from scattering to the side.

[0027] The working principle is as follows: the mechanism mainly consists of three stages: equipment self-test, positioning calibration, and formal testing. When equipment self-test is required, it verifies the detection effect of the CCD detector. After the equipment is started, it first enters the self-test process. The core purpose of this process is to test the detection sensitivity of the CCD detector and verify whether there are any false triggers, missed alarms, or random alarms caused by light source interference. During the self-test, the control box 101 issues a command to first control the light source 900 to start. After being guided by the light shield 901, the cold light source shines vertically onto the bearing hole of the bearing seat 800. At this time, no needle tube workpiece is placed on the bearing seat 800, and the detection channel is in a completely transparent state. Subsequently, the drive motor 201 starts, drives the lead screw to rotate, and drives the slide 203 and the mounting plate 300 to move along the length of the support platform 200, moving the optical probe of the CCD detector to directly above the bearing hole, completing the initial positioning of the detection position.

[0028] After the initial positioning of the detection position is completed, the control box 101 controls the first telescopic component 601 to extend, causing the shield 600 to move downwards vertically until the shield 600 completely blocks the optical path between the optical probe and the carrier hole. At this time, the optical probe should not be able to receive the light emitted by the light source 900, and the analysis system of the CCD detector should identify the light path blockage signal and trigger the alarm mechanism. If the CCD detector does not alarm, it is determined that there is a missed detection fault in the detection system. If an alarm occurs when the shield 600 is not blocking the light, it is determined that there is a false triggering or light source interference problem in the detection system.

[0029] After the self-test is completed, if the CCD detector alarms normally, the first telescopic component 601 will drive the shield 600 to reset, and the equipment will enter the next stage. If the alarm is abnormal, the control panel of the control box 101 will display a fault code, reminding the operator to troubleshoot and repair, and avoid performing tests with faults. This self-test process uses the active light blocking of the shield 600 to simulate the extreme condition of complete blockage of the needle channel, so as to quickly and intuitively verify the effectiveness of the CCD detection system and avoid the risk of batch misjudgment caused by detection system failure from the source.

[0030] During the positioning calibration phase, the carrier 800 is displaced to prevent misalignment with the CCD detector. This mechanism utilizes the cooperation of the second telescopic component 701 and the third telescopic component 703 to achieve vertical and horizontal displacement calibration of the carrier 800. Positioning calibration is performed after self-inspection and before workpiece installation. The operator can input the specifications of the needle workpiece through the control panel of the control box 101, and the system will preset displacement calibration commands based on these parameters. First, the second telescopic component 701 is activated, causing the connecting plate 702, the third telescopic component 703, and the carrier 800 to rise and fall vertically, adjusting the vertical distance between the carrier 800 and the optical probe to ensure the optical probe is within the optimal imaging focal length range. Subsequently, the third telescopic component 703 is activated, causing the carrier 800 to move horizontally, fine-tuning the horizontal position of the detection channel to align the axis of the detection channel with the axis of the optical probe. Furthermore, during the positioning and calibration process, the CCD detector acquires image signals of the carrier hole in real time and transmits them to the analysis system in the control box 101. The system uses image recognition technology to determine the alignment deviation between the center of the carrier hole and the center of the optical probe. If the deviation exceeds a preset threshold, it automatically controls the second telescopic component 701 and the third telescopic component 703 to continue fine-tuning until the alignment deviation meets the accuracy requirements. In addition, when changing to needle tubes of different specifications, the operator can repeat this positioning and calibration process, using the second telescopic component 701 and the third telescopic component 703 to move the carrier seat 800 to accommodate needle tubes of various specifications.

[0031] During the formal testing phase, the needle tube workpiece is inserted into the bearing hole of the carrier 800 using a robotic arm or feeding module. The workpiece is then centered and clamped by the clamping component 801 to ensure the needle tube channel is coaxial with the testing channel. After the needle tube workpiece is installed, the control box 101 restarts the light source 900. The light from the cold light source is guided by the light shield 901 and directed towards the lower opening of the bearing hole. The light then passes through the testing channel and the internal channel of the needle tube, finally reaching the optical probe of the CCD detector. The horn-shaped structure of the light shield 901 constrains the emission direction of the light source, preventing light from escaping from the side and being reflected by the environment into the optical probe, thus preventing the CCD detector from misjudging the needle tube channel as transparent.

[0032] Secondly, if the needle channel is unobstructed, light can be directed to the optical probe without obstruction. The optical probe transmits the light signal to the analysis system of the CCD detector. The system determines that the needle channel is unobstructed, and the control panel displays a qualified status. If the needle channel has defects such as injection molding overflow or foreign matter blockage, the light will be blocked by the blockage, and the optical probe will not be able to receive a complete light signal. The analysis system determines the type of blockage (partial or complete blockage) of the needle channel based on the degree of light signal loss and triggers an alarm mechanism. The control panel displays a non-qualified or defective status and controls the sorting mechanism of subsequent processes. This mechanism can be connected to external sorting modules, feeding modules, etc., for automatic rejection of defective products.

[0033] Finally, after a single needle tube is inspected, the workpiece is removed by the sorting module and then loaded into the next workpiece by the loading module, thus realizing the automatic loading and inspection of needle tube workpieces to meet the needs of large-scale production.

[0034] In the above solution, the light-blocking self-test of the shield 600 is used to quickly verify the effectiveness of the CCD detection system, avoiding the risk of misjudgment caused by detection system failure from the source; the cooperation of the second telescopic component 701 and the third telescopic component 703 realizes the vertical and horizontal displacement calibration of the carrier 800, so that the carrier 800 is aligned with the detection component to adapt to the detection requirements of multi-specification needle tubes; the light-blocking cover 901 constrains the light source, which can eliminate detection interference caused by light scattering, and prevent unknown light from interfering with the light source component 900. In this way, the problem of injection molded parts blocking the needle tube channel can be quickly and stably identified, preventing defective products from flowing into subsequent processes.

[0035] Components not described in detail in this article are existing technologies.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A needle tube channel plugging detection mechanism, comprising a frame (700) and a support seat (800) disposed on the frame (700), characterized in that, Also includes: The detection assembly has a detection lens perpendicular to the surface of the carrier (800) at its detection end. The carrier (800) has a carrier hole with openings formed on the upper and lower surfaces of the carrier (800). The carrier hole and the openings are connected to form a detection channel. The axis of the detection channel is parallel to the axis of the detection lens. A light source (900) is mounted on a stand (700). The light source (900) has a light-emitting surface that emits light towards the opening of the bearing hole. The light source (900) is adapted to the detection end of the detection assembly to assist the detection lens on the detection assembly in forming a relative detection optical path with the detection channel in the bearing hole.

2. The needle tube channel blockage detection mechanism according to claim 1, characterized in that, The detection assembly includes a support platform (200), on which a mounting plate (300) is provided on one side near the bearing seat (800). An extension bracket (400) is provided on the mounting plate (300), and a detection camera (500) is fixedly connected to the extension bracket (400). The detection lens includes a detection head (501) provided on the detection camera (500). A drive unit is provided inside the support platform (200) to drive the mounting plate (300) to move along the length direction of the support platform (200).

3. The needle tube channel blockage detection mechanism according to claim 2, characterized in that, The drive includes a slide (203) slidably mounted on a support platform (200), a mounting plate (300) fixedly connected to the slide (203), a drive motor (201) at one end of the support platform (200), a lead screw at the output end of the drive motor (201), a threaded groove adapted to the lead screw on the slide (203), and the slide (203) connected to the lead screw. When the drive motor (201) drives the lead screw to rotate along its own axis, the slide (203) and the mounting plate (300) move together along the length direction of the support platform (200).

4. A needle tube channel blockage detection mechanism according to claim 2 or 3, characterized in that, The mounting plate (300) is provided with a first telescopic member (601), and the telescopic end of the first telescopic member (601) is provided with a baffle plate (600). The telescopic direction of the baffle plate (600) is perpendicular to the moving direction of the mounting plate (300).

5. The needle tube channel blockage detection mechanism according to claim 1, characterized in that, The platform (700) is provided with a second telescopic member (701), and the telescopic end of the second telescopic member (701) is provided with a connecting plate (702). The connecting plate (702) is provided with a third telescopic member (703). The telescopic directions of the second telescopic member (701) and the third telescopic member (703) are perpendicular. The bearing seat (800) is fixedly connected to the telescopic end of the third telescopic member (703).

6. The needle tube channel blockage detection mechanism according to claim 5, characterized in that, A clamping member (801) is provided in the bearing hole of the bearing seat (800), and a guide tube (802) is provided on the clamping member (801). The axis of the guide tube (802) is perpendicular to the top surface of the bearing seat (800).

7. The needle tube channel blockage detection mechanism according to claim 5, characterized in that, A guide frame plate (804) is provided at the opening position of one of the bearing holes on the bearing seat (800), and the opening direction of the guide frame plate (804) is parallel to the axial direction of the bearing hole.

8. The needle tube channel blockage detection mechanism according to claim 7, characterized in that, The support base (800) is provided with a support plate (803), and the support plate (803) is provided with a guide hole (805) that communicates with the support hole. The guide frame plate (804) is arranged around the position of the guide hole (805).

9. The needle tube channel blockage detection mechanism according to claim 1, characterized in that, A light shield (901) is fixedly connected to the light source (900). The opening direction of the light shield (901) is adapted to the light source (900) and is used to guide the light emitted by the light source (900) toward the bearing hole on the bearing seat (800).

10. A needle tube channel blockage detection mechanism according to claim 1, characterized in that, It also includes a base (100), the top surface of which is provided with a platform, and the stand (700) is fixedly connected to the platform.

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