Gastrointestinal nutrition tube mirror assembly

Abstract

The invention discloses a gastrointestinal nutrition tube endoscope assembly, and relates to the field of nasal and gastrointestinal catheters.The gastrointestinal nutrition tube endoscope assembly comprises a handle, a flexible sleeve is arranged at the bottom end of the handle, a movable part is arranged at the bottom end of the flexible sleeve, and a control mechanism is arranged on the handle and used for controlling the bending angle of the movable part; a pipe body is arranged at the bottom of the connector, a camera module is arranged at the bottom end of the pipe body, and a plurality of discharge outlets are formed in the side face of the pipe body; the connector is matched with the bottom end of the handle in an inserted mode through a conical sleeve. The bending angle of the movable part is controlled by operating the control mechanism so as to drive the far end of the tube body to conduct bending adjustment. And a real-time and intuitive intracavity visual field is provided. An operator can clearly observe the path from the nasal cavity / oral cavity to the esophagus and stomach to the target intestinal tract. The device effectively avoids entering the airway by mistake, and can actively bypass mucus, wrinkles or narrow areas.

Description

Technical Field

[0001] This invention relates to the technical field of nasoenteric tubes, and more specifically to gastrointestinal nutrition tubing assemblies. Background Technology

[0002] In clinical practice, nasal insertion of a gastrointestinal feeding tube is a crucial procedure for providing enteral nutritional support to patients who are unable to eat orally. Traditional insertion methods often employ a "blind insertion" approach, relying on the operator's experience and the patient's swallowing reflex to passively advance the tube into the target position.

[0003] Because traditional gastrointestinal feeding tubes are passive instruments, their tips lack adjustable bending or steering capabilities. When the tube encounters physiological bends, mucus accumulation, or localized narrowing in the digestive tract, the operator cannot actively adjust the direction and angle of the tip, and can only passively attempt insertion by repeatedly advancing and retreating, rotating the tube, or changing the patient's position. This can easily lead to prolonged insertion time, increased patient discomfort, and may affect the success rate of insertion.

[0004] Based on this, the present invention provides a gastrointestinal nutrition endoscope assembly. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a gastrointestinal nutrition endoscope assembly that offers real-time, intuitive endoscopic visualization. The operator can clearly observe the path from the nasal / oral cavity to the esophagus, stomach, and ultimately the target intestine. This effectively avoids accidental airway entry and allows for proactive bypassing of mucus, folds, or narrow areas.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gastrointestinal nutrition endoscope assembly, including a handle, a flexible sleeve at the bottom end of the handle, a movable component at the bottom end of the flexible sleeve, and a control mechanism on the handle for controlling the bending angle of the movable component; a connector, a tube body at the bottom of the connector, a camera module at the bottom end of the tube body, and multiple discharge ports on the side of the tube body; wherein the connector is inserted into the bottom end of the handle via a conical sleeve; the bending angle of the movable component is controlled by operating the control mechanism to drive the distal end of the tube body to bend and adjust.

[0007] Furthermore, the control mechanism includes a turntable rotatably disposed inside the handle, with a torsion spring at its bottom for resetting after the turntable rotates; two traction lines distributed within the handle and the flexible sleeve, one end of each traction line connected to the movable component, and the other end of each traction line connected to the turntable; and a handwheel rotatably disposed on the side of the handle and connected to the turntable.

[0008] Furthermore, it also includes a fixing mechanism, which is inserted through the tube body to fix the tube body to the patient's nostrils.

[0009] Furthermore, the fixing mechanism includes a ring sleeve passing through the tube body, with an airbag ring provided on the inner side wall of the ring sleeve; a rectangular seat provided on the side of the ring sleeve; a fixed block provided on the side of the ring sleeve; a movable block provided on the top of the rectangular seat; airbags are provided on the top of the fixed block and the bottom of the movable block; and an inflation component provided on the rectangular seat for simultaneously inflating the airbag ring and the airbag.

[0010] Further, the inflatable component includes a movable rod slidably inserted into the top of the rectangular base, with the bottom end of the movable rod disposed within the rectangular base; a rectangular sleeve disposed at the bottom end of the movable rod, with a gear rotatably disposed inside the rectangular sleeve; a fixed rack disposed inside the rectangular base; a movable rack slidably disposed inside the rectangular base; both the fixed rack and the movable rack mesh with the gear; and a pair of air pumps disposed within the rectangular base; wherein one air pump is connected to the airbag ring and can be driven by the downward movement of the rectangular sleeve to perform an inflation action; the other air pump is connected to the airbag and can be driven by the movable rack to perform an inflation action.

[0011] Furthermore, the capacity of the air inflator connected to the moving rack is twice the capacity of the air inflator connected to the rectangular sleeve.

[0012] Furthermore, the air inflator includes a sleeve disposed inside the rectangular seat; a push rod slidably passing through the top of the sleeve; and a piston disposed at the bottom end of the push rod and located inside the sleeve; wherein the top end of the push rod is connected to the rectangular sleeve or the movable rack.

[0013] Furthermore, a spring is provided in the middle of the moving rod, a stop is provided inside the rectangular seat, and the spring is arranged between the stop and the inner top wall of the rectangular seat.

[0014] Furthermore, a magnetic pad is provided at the top of the moving rod, and a groove is provided at the top of the rectangular base. The magnetic pad can be attracted into the groove, and a pull plate is provided at the top of the magnetic pad.

[0015] Compared with existing technologies, the gastrointestinal nutrition endoscope assembly provided by this invention inserts the flexible sleeve and movable component on the handle into the tube body, ensuring that the movable component is positioned inside the tube corresponding to the camera module. The tube is then inserted into the gastrointestinal tract via the nasal cavity. The camera module captures real-time images of the environment surrounding the tube's tip and transmits the images to an external display terminal. The user can adjust the bending angle of the distal end of the tube using a control mechanism to guide its direction, depending on the tube's progress. Once the tube reaches the target gastrointestinal region, the handle and flexible sleeve can be withdrawn from the tube. This design provides a real-time, intuitive intraluminal view. The operator can clearly observe the path from the nasal / oral cavity to the esophagus, stomach, and finally the target intestine. It effectively avoids accidental airway entry and can actively bypass mucus, folds, or narrow areas.

[0016] Move the ring to the nostril position, placing the movable block on the outside of the nostril and the fixed block on the inside. Then, supply air to the airbag ring and airbags through the inflation device. After the airbag ring inflates, it securely connects the ring to the tube body. Simultaneously, the two airbags inflate, contacting each other and pressing against the nasal ala, thus stably fixing the tube body to the patient's nose. The inflated airbags evenly conform to the nasal cavity / ala, forming a three-dimensional wrap and pressure distribution, preventing the adhesive tape from losing its stickiness or loosening due to skin oils, sweat, or facial movements. The airbags are soft and allow for pressure control, avoiding skin damage, irritation, or allergic reactions caused by repeated application and removal of the adhesive tape, making them more suitable for long-term tube placement and patients with sensitive skin. The inflator allows for real-time adjustment of the fixation tightness, and deflation and repositioning are possible when necessary, avoiding the inconvenience of replacing disposable adhesive tape and facilitating clinical observation and local care.

[0017] By simultaneously inflating the airbag ring and airbag through the inflator, the airbag ring and airbag are inflated synchronously, ensuring that both reach the ideal fixation pressure. The downward movement distance of the moving rack is twice that of the rectangular sleeve, which matches the capacity ratio of the inflator to ensure gas distribution. By simply pressing down the moving rod, dual inflation for tube fixation and nasal ala fixation can be completed simultaneously, simplifying the clinical operation process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the gastrointestinal nutrition endoscope assembly in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the handle and the flexible sleeve in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the joint and pipe body in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the control mechanism in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the fixing mechanism in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure on the other side of the fixing mechanism in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the inflatable component in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of the inflatable component in an embodiment of the present invention;

[0027] Figure 9 This is a cross-sectional structural schematic diagram of the inflatable component in an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the air inflator in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Handle; 2. Flexible sleeve; 3. Moving part; 4. Control mechanism; 400. Turntable; 401. Traction line; 402. Handwheel; 5. Connector; 6. Tube body; 7. Camera module; 8. Fixing mechanism; 800. Ring sleeve; 801. Airbag ring; 802. Rectangular seat; 803. Fixed block; 804. Moving block; 805. Airbag; 806. Moving rod; 807. Rectangular sleeve; 808. Gear; 809. Fixed rack; 810. Moving rack; 811. Sleeve; 812. Push rod; 813. Piston; 814. Stop block; 815. Magnetic pad; 816. Spring; 9. Conical sleeve. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] As attached Figure 1 To be continued Figure 10 As shown:

[0033] This invention provides a gastrointestinal nutrition tube endoscope assembly, including a handle 1 and a connector 5;

[0034] The handle 1 has a flexible sleeve 2 at its bottom end, a movable part 3 at its bottom end, and a control mechanism 4 on the handle 1 to control the bending angle of the movable part 3. The connector 5 has a tube 6 at its bottom end, a camera module 7 at its bottom end, and multiple discharge ports on its side. The connector 5 is connected to the bottom end of the handle 1 via a conical sleeve 9. The bending angle of the movable part 3 is controlled by operating the control mechanism 4 to drive the distal end of the tube 6 to bend and adjust.

[0035] Specifically, the camera module 7 can be mounted on the side of the tube body 6 or directly on the side of the movable part 3. The camera module 7 includes a miniature medical camera and a medical lamp head, and the connection lines of the two are integrated inside the side wall of the tube body 6 or integrated inside the flexible sleeve 2.

[0036] Specifically, the lens surface of the miniature medical camera is treated with a special anti-fog / anti-haze coating. This coating effectively resists contamination, fogging, and biomolecule adsorption commonly found in complex bodily fluid environments such as the intestines, thereby ensuring continuous image clarity during surgery or examination and reducing the number of times the operation needs to be interrupted for cleaning due to blurred vision.

[0037] Specifically, the antifog / anti-fog coating can be an amphoteric copolymer / hybrid coating, a hydrophilic nano-coating, or a silica-doped diamond-like carbon coating.

[0038] Specifically, during use, the flexible sleeve 2 and movable part 3 on the handle 1 are first inserted into the tube 6, ensuring that the movable part 3 is positioned inside the tube 6 corresponding to the camera module 7. Then, the tube 6 is inserted into the gastrointestinal tract through the nasal cavity. The camera module 7 captures real-time images of the environment surrounding the front of the tube 6 and transmits the images to an external display terminal. The user can adjust the bending angle of the distal end of the tube 6 using the control mechanism 4 to guide its direction, depending on its movement. Once the tube 6 reaches the target gastrointestinal region, the handle 1 along with the flexible sleeve 2 can be withdrawn from the tube 6.

[0039] This structural design provides a real-time, intuitive intracavitary view. Operators can clearly observe the path from the nasal / oral cavity to the esophagus, stomach, and ultimately the target intestine. It effectively avoids accidental airway entry and can actively bypass mucus, folds, or narrow areas.

[0040] like Figure 2 and Figure 4 As shown, the control mechanism 4 includes a turntable 400, two traction cables 401, and a handwheel 402;

[0041] The turntable 400 is rotatably mounted inside the handle 1, and a torsion spring is installed at its bottom for resetting after the turntable 400 rotates. When the turntable 400 rotates, the torsion spring will rotate and store force. Two traction lines 401 are distributed in the handle 1 and the flexible sleeve 2. One end of each traction line 401 is connected to the movable part 3, and the other end of each traction line 401 is connected to the turntable 400. The handwheel 402 is rotatably mounted on the side of the handle 1 and is connected to the turntable 400.

[0042] Specifically, the movable part 3 is a snake bone assembly, and two traction lines 401 are symmetrically connected to the snake bone assembly.

[0043] Specifically, turning the handwheel 402 on the side of the handle 1 will rotate the internal turntable 400. During rotation, the turntable 400 winds up one of the traction lines 401, causing it to contract, which in turn pulls the movable part 3 (i.e., the snake bone assembly) to deform, thereby adjusting the angle and bending of the movable part 3. Finally, this action is transmitted to the front end of the tube body 6, causing it to change direction accordingly as the movable part 3 bends.

[0044] like Figure 5 and Figure 6 As shown, it also includes a fixing mechanism 8, which is inserted through the tube body 6 and used to fix the tube body 6 at the patient's nostril; the fixing mechanism 8 includes a ring 800, a rectangular seat 802, a fixed block 803, a movable block 804 and an inflation component;

[0045] The ring 800 is inserted through the tube body 6, and an airbag ring 801 is provided on the inner side wall of the ring 800; a rectangular seat 802 is provided on the side of the ring 800; a fixed block 803 is provided on the side of the ring 800; a movable block 804 is provided on the top of the rectangular seat 802; an airbag 805 is provided on the top of the fixed block 803 and the bottom of the movable block 804; and an inflation component is provided on the rectangular seat 802 to simultaneously inflate the airbag ring 801 and the airbag 805.

[0046] Specifically, after the cannulation of tube 6 is completed, the ring 800 is moved to the nostril position, with the movable block 804 positioned on the outside of the nostril and the fixed block 803 positioned on the inside of the nostril. Then, air is supplied to the airbag ring 801 and airbag 805 through the inflation device. After the airbag ring 801 inflates, the ring 800 is securely connected to tube 6; simultaneously, the two airbags 805 inflate, contacting each other and pressing against the nasal ala, thereby stably fixing tube 6 to the patient's nose.

[0047] Through this structural design, the inflatable 805 airbag can evenly conform to the nasal cavity / nasal wings after inflation, forming a three-dimensional wrap and pressure distribution, avoiding the decrease in adhesion and loosening of the adhesive tape due to skin oil, sweat, or facial movements; the 805 airbag is soft and the pressure can be controlled, avoiding damage, irritation, or allergic reactions to the skin caused by repeated application and removal of the adhesive tape, making it more suitable for patients with long-term catheter placement and sensitive skin; the inflatable component allows for real-time adjustment of the fixation tightness, and deflating and repositioning when necessary, avoiding the inconvenience of replacing disposable adhesive tape, and also facilitating clinical observation and local care.

[0048] like Figures 7 to 9 As shown, the inflation component includes a movable rod 806, a rectangular sleeve 807, a fixed rack 809, a movable rack 810, and a pair of air pumps;

[0049] The moving rod 806 is slidably inserted into the top of the rectangular base 802, and the bottom end of the moving rod 806 is arranged inside the rectangular base 802; the rectangular sleeve 807 is disposed at the bottom end of the moving rod 806, and a gear 808 is rotatably disposed inside the rectangular sleeve 807; the fixed rack 809 is disposed inside the rectangular base 802; the moving rack 810 is slidably disposed inside the rectangular base 802; both the fixed rack 809 and the moving rack 810 mesh with the gear 808; a pair of air inflators are disposed inside the rectangular base 802; one air inflator is connected to the airbag ring 801 and can be driven by the downward movement of the rectangular sleeve 807 to perform an air inflating action; the other air inflator is connected to the airbag 805 and can be driven by the moving rack 810 to perform an air inflating action.

[0050] Specifically, the capacity of the air inflator connected to the moving rack 810 is twice the capacity of the air inflator connected to the rectangular sleeve 807.

[0051] Specifically, the inflation operation is as follows: The operator pushes the rod 806 down, causing the rectangular sleeve 807 connected to its bottom end to move downward together. Since the rectangular sleeve 807 has a gear 808 installed inside, and the gear 808 meshes with the fixed rack 809 fixed in the rectangular seat 802, when the rectangular sleeve 807 moves down, the gear 808 will rotate along the fixed rack 809. The rotation of the gear 808 further drives the moving rack 810 meshing with it to move downward.

[0052] The displacement of the movable rack 810 can reach twice the displacement of the rectangular sleeve 807. This ratio ensures that the two inflators can perform inflation actions synchronously and in a coordinated manner: one inflator is directly driven by the downward movement of the rectangular sleeve 807 to supply air to the airbag ring 801; the other inflator is driven by the movable rack 810 to supply air to a pair of airbags 805. In this way, the airbag ring 801 and the two airbags 805 can expand synchronously, thereby synchronously achieving the fastening between the ring 800 and the tube 6, as well as the uniform pressing and fixing of the airbags 805 on the nose wings.

[0053] This structural design enables synchronous inflation of the airbag ring 801 and the airbag 805, ensuring that both reach the ideal fixation pressure. The downward movement distance of the movable rack 810 is twice that of the rectangular sleeve 807, which matches the capacity ratio of the air inflator, ensuring gas distribution. By simply pressing down the movable rod 806, dual inflation of the tube body 6 and the nasal ala fixation can be completed simultaneously, simplifying the clinical operation process.

[0054] like Figure 10 As shown, the air-inflating component includes a sleeve 811, a push rod 812, and a piston 813;

[0055] The sleeve 811 is located inside the rectangular seat 802; the push rod 812 slides through the top of the sleeve 811; the piston 813 is located at the bottom of the push rod 812 and inside the sleeve 811; the top of the push rod 812 is connected to the rectangular sleeve 807 or the moving rack 810.

[0056] Specifically, the push rod 812 moves downward, causing the piston 813 to move downward, thereby delivering the air (or fluid) in the sleeve 811 to the corresponding airbag 805 or airbag ring 801 to complete the expansion.

[0057] In one embodiment of the present invention, such as Figure 8 and Figure 9 As shown, a spring 816 is provided in the middle of the moving rod 806, a stop block 814 is provided inside the rectangular seat 802, the spring 816 is arranged between the stop block 814 and the inner top wall of the rectangular seat 802, a stop bar is provided in the middle of the moving rod 806, the fixed end of the spring 816 is connected to the stop bar, a magnetic pad 815 is provided at the top of the moving rod 806, a groove is provided at the top of the rectangular seat 802, the magnetic pad 815 can be attracted into the groove, an iron sheet is provided inside the groove for attracting the magnetic pad 815, and a pull plate is provided at the top of the magnetic pad 815.

[0058] Specifically, when the moving rod 806 is pushed, the spring 816 is compressed and stores energy, while the magnetic pad 815 is attracted to the groove, thus locking the moving rod 806 in the downward position. To reset, the pull plate is pulled upwards to separate the magnetic pad 815 from the groove, releasing the spring 816 and pushing the moving rod 806 upwards to reset. Alternatively, the moving rod 806 can be manually lifted directly using the pull plate for flexible operation, completing the deflation of the airbag 805 and airbag ring 801.

[0059] In one embodiment of the present invention, such as Figure 5 As shown, the movable block 804 is rotatably mounted on the top of the rectangular base 802 via a torsion spring, and a press plate is provided on the side of the movable block 804. When it is necessary to adjust the clamping position, pressing down the press plate can cause the movable block 804 to tilt upward. At this time, rotating the ring 800 can change the fixed position, avoiding long-term pressing of a single position in the nose area.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually.

[0061] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0062] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gastrointestinal nutrition tube endoscope assembly, characterized in that, include: Handle (1), the bottom end of the handle (1) is provided with a flexible sleeve (2), the bottom end of the flexible sleeve (2) is provided with a movable part (3), and the handle (1) is provided with a control mechanism (4) for controlling the bending angle of the movable part (3). The connector (5) has a pipe body (6) at its bottom and a camera module (7) at its bottom end. The pipe body (6) has multiple discharge ports on its side. The connector (5) is inserted into the bottom end of the handle (1) via a conical sleeve (9); By operating the control mechanism (4), the bending angle of the movable part (3) is controlled, so as to drive the distal end of the tube (6) to bend and adjust.

2. The gastrointestinal nutrition tubing assembly according to claim 1, characterized in that, The control mechanism (4) includes: The turntable (400) is rotatably disposed inside the handle (1), and a torsion spring is provided at its bottom for resetting the turntable (400) after rotation; Two traction lines (401) are distributed inside the handle (1) and the flexible sleeve (2). One end of each traction line (401) is connected to the movable part (3), and the other end of each traction line (401) is connected to the turntable (400). A handwheel (402) is rotatably disposed on the side of the handle (1), and the handwheel (402) is connected to the turntable (400).

3. The gastrointestinal nutrition tubing assembly according to claim 1, characterized in that, It also includes a fixing mechanism (8) which is inserted through the tube (6) to fix the tube (6) to the patient's nostrils.

4. The gastrointestinal nutrition tubing assembly according to claim 3, characterized in that, The fixing mechanism (8) includes: A ring (800) is inserted through the tube body (6), and an airbag ring (801) is provided on the inner side wall of the ring (800). A rectangular base (802) is disposed on the side of the ring (800); A fixing block (803) is disposed on the side of the ring sleeve (800); A movable block (804) is disposed on top of the rectangular base (802); Airbags (805) are provided at the top of the fixed block (803) and at the bottom of the moving block (804). An inflatable component is provided on the rectangular base (802) for simultaneously inflating the airbag ring (801) and the airbag (805).

5. The gastrointestinal nutrition tubing assembly according to claim 4, characterized in that, The inflatable component includes: A movable rod (806) is slidably inserted into the top of the rectangular base (802), and the bottom end of the movable rod (806) is arranged inside the rectangular base (802); A rectangular sleeve (807) is provided at the bottom end of the moving rod (806), and a gear (808) is rotatably provided inside the rectangular sleeve (807). A fixed rack (809) is disposed inside the rectangular seat (802); The movable rack (810) is slidably disposed inside the rectangular seat (802); Both the fixed rack (809) and the movable rack (810) mesh with the gear (808); A pair of air inflators are disposed within the rectangular base (802); One of the air-inflating components is connected to the airbag ring (801) and can be driven by the downward movement of the rectangular sleeve (807) to perform an air-inflating action; Another of the aforementioned inflators is connected to the airbag (805) and can be driven by the movable rack (810) to perform an inflating action.

6. The gastrointestinal nutrition tubing assembly according to claim 5, characterized in that, The capacity of the air inflator connected to the moving rack (810) is twice the capacity of the air inflator connected to the rectangular sleeve (807).

7. The gastrointestinal nutrition tubing assembly according to claim 5, characterized in that, The air inflator includes: A sleeve (811) is disposed inside the rectangular seat (802); The push rod (812) slides through the top of the sleeve (811); The piston (813) is disposed at the bottom end of the push rod (812) and located inside the sleeve (811); The top end of the push rod (812) is connected to the rectangular sleeve (807) or the moving rack (810).

8. The gastrointestinal nutrition tubing assembly according to claim 5, characterized in that, A spring (816) is provided in the middle of the moving rod (806), and a stop block (814) is provided inside the rectangular seat (802). The spring (816) is arranged between the stop block (814) and the inner top wall of the rectangular seat (802).

9. The gastrointestinal nutrition tubing assembly according to claim 5, characterized in that, The top of the moving rod (806) is provided with a magnetic pad (815), and the top of the rectangular seat (802) is provided with a groove. The magnetic pad (815) can be attracted into the groove, and the top of the magnetic pad (815) is provided with a pull plate.

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