Dual lumen picc catheter powered flush tube assist device

Abstract

The utility model belongs to the field of medical injection discloses double -cavity PICC catheter electric drive and seals the pipe auxiliary device of helping, including fixed mat layer, transmission assembly and propulsion assembly, the upper end surface of fixed mat layer is fixed with at least one fixed buckle, and the upper end of synchronous board is fixed with propulsion assembly, the outside of propulsion assembly is fixed with dust -proof box, and the inside of dust -proof box is slidingly provided with transmission assembly, and the lateral wall of dust -proof box is provided with servo motor that penetrates dust -proof box, the propulsion assembly includes support plate, perforation and cylinder block, the inside of support plate is provided with rectangular groove, and the inside of rectangular groove is provided with the perforation that penetrates support plate, and the inside of perforation is clamped with cylinder block, through transmission assembly and propulsion assembly, when the diameter of needle tube changes, the position of cylinder block on propulsion assembly is adjusted to adapt the diameter of needle tube, and transmission assembly can also adaptively adjust according to the diameter of needle tube, thereby being convenient to use.

Description

Technical Field

[0001] This disclosure pertains to the field of medical injection, specifically relating to an electric flushing and sealing auxiliary device for dual-lumen PICC catheters. Background Technology

[0002] Dual-lumen PICC flushing and sealing is a technique used for peripherally inserted central catheters (PICC). It is mainly used to ensure catheter patency and prevent catheter-related complications. Proper flushing and sealing can reduce the incidence of catheter occlusion, shorten operation time, and improve work efficiency. However, when flushing and sealing a dual-lumen PICC, both lumens need to be operated on simultaneously to ensure that the pre-flush syringes on both sides are sealed with equal volume and pressure, avoiding blood backflow that could cause catheter occlusion.

[0003] However, the electric dual-chamber static pulse sealing tube with the public announcement number CN221579187U uses a controller to control a servo motor, which drives a transmission component to rotate. The transmission component converts the continuous rotation of the motor into an intermittent push of the plunger, which in turn pushes the injection tube, thus achieving a push-stop pulse effect. However, because the transmission gap of the transmission component is fixed, the intermittent push length is the same. This means that when using needles of different diameters, if the push length remains unchanged, it is easy to inject too much, or if the push time is too long, it is easy to increase the injection time. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this disclosure is to provide an electric flushing and sealing auxiliary device for dual-lumen PICC catheters, which solves the problem in existing technologies where the gears or gaps in the gap structure are fixed and difficult to adjust, resulting in difficulty in changing the propulsion distance when using needles of different diameters to propel the same volume of solution.

[0005] The objective of this disclosure can be achieved through the following technical solutions:

[0006] The dual-lumen PICC catheter electric flushing and sealing auxiliary device includes: a fixing pad, a transmission assembly, and a propulsion assembly;

[0007] At least one fixing buckle is fixed to the upper end surface of the fixing pad, and a needle tube is fixed to the inner side of the fixing buckle. A needle handle is slidably fitted to the inner side of the needle tube. A synchronization plate is engaged to the outer side of the needle handle. A propulsion assembly is fixed to the upper end of the synchronization plate. A dustproof box is fixed to the outer side of the propulsion assembly. A transmission assembly is slidably arranged to the inner side of the dustproof box. A servo motor penetrating the dustproof box is arranged to the side wall of the dustproof box.

[0008] The propulsion assembly includes a support plate, a perforation, and a cylindrical block. The support plate has a rectangular groove on its inner side, and a perforation penetrating the support plate is formed on the inner side of the rectangular groove. The cylindrical block is engaged with the inner side of the perforation.

[0009] In some disclosures, a handle is fixed to the upper end of the fixing pad, and a control panel is provided on the upper surface of the fixing pad, and the fixing pad is made of a flexible material.

[0010] In some disclosures, the fixing buckle includes a rotating seat, an arc-shaped groove, and a fixing seat. The upper end surface of the fixing pad is fixed by the rotating seat, and the outer side of the rotating seat is rotatably connected to the arc-shaped groove. The side of the arc-shaped groove away from the rotating seat is engaged with the fixing seat.

[0011] In some disclosures, an elastic protrusion is fixed on the side of the arc-shaped slot near the fixing base, and the upper end of the fixing base is provided with a slot that matches the elastic protrusion.

[0012] In some disclosures, an arc-shaped piece is fitted inside the arc-shaped slot, and an elastic piece is fixed between the arc-shaped piece and the arc-shaped slot.

[0013] In some disclosures, the transmission assembly includes a connecting rod, a telescopic rod, a slider, and a support structure. The output end of the servo motor is fixed to the telescopic rod, and one end of the telescopic rod is rotatably connected to the connecting rod. The end of the connecting rod away from the telescopic rod is rotatably connected to the slider, and a support structure is provided on the outer side of the slider.

[0014] In some disclosures, the support structure includes a guide rail, a lever, and a stop bar. The inner wall of the dust box is fixed with the guide rail, and the guide rail is adapted to the slider. The front end face of the slider is rotatably connected to the lever, and the lower end of the lever is fixed with a stop bar.

[0015] In some disclosures, the telescopic rod includes a support rod, an adjusting rod, and a fixing rod. The output end of the servo motor is fixed to the support rod, and the adjusting rod is slidably connected to the inner side of the support rod. The outer side of the adjusting rod is provided with multiple positioning holes, and the fixing rod passes through the support rod and the adjusting rod.

[0016] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0017] A fixed connection refers to a connection in which parts or components are fixed in place and there is no relative movement between them;

[0018] A rotating connection is a connection between parts that allows the parts to rotate relative to each other.

[0019] Threaded connections are a type of detachable fixed connection with advantages such as simple structure, reliable connection, and convenient assembly and disassembly. They are widely used in mechanical engineering and connection structure fields.

[0020] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0021] The beneficial effects of this disclosure are:

[0022] 1. Through the transmission component and the propulsion component, when the diameter of the needle tube changes, the position of the cylindrical block on the propulsion component can be adjusted to match the diameter of the needle tube. At the same time, the transmission component can also be adjusted adaptively according to the diameter of the needle tube, thus facilitating use.

[0023] 2. When the cylindrical block at the end is pushed forward, the servo motor continues to rotate but will not drive the propulsion component to continue pushing forward. This limits the forward movement of the support plate even if the servo motor is not turned off in time, allowing some medication to be stored in the syringe, thereby reducing backflow and protecting the body. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this disclosure;

[0026] Figure 2 This is a top view schematic diagram of an embodiment of this disclosure;

[0027] Figure 3 This is a schematic diagram of the connection structure between the transmission structure and the propulsion component according to an embodiment of this disclosure;

[0028] Figure 4 This is an embodiment of the present disclosure. Figure 3 Enlarged structural diagram at point A in the diagram;

[0029] Figure 5 This is a schematic diagram of the overall structure of the fixing buckle according to an embodiment of the present disclosure.

[0030] In the diagram: 1. Fixed pad; 2. Handle; 3. Control panel; 4. Needle tube; 41. Needle handle; 5. Fixed buckle; 51. Rotating seat; 52. Arc-shaped groove; 53. Fixed seat; 521. Elastic protrusion; 522. Arc-shaped piece; 523. Elastic piece; 531. Groove; 6. Synchronization plate; 7. Transmission assembly; 71. Connecting rod; 72. Telescopic rod; 73. Slider; 74. Support structure; 721. Support rod; 722. Adjusting rod; 723. Fixed rod; 741. Guide rail; 742. Paddle; 743. Stop bar; 7221. Positioning hole; 8. Servo motor; 9. Propulsion assembly; 91. Support plate; 92. Perforation; 93. Cylindrical block; 901. Rectangular groove; 10. Dust box. Detailed Implementation

[0031] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0032] Based on the concept of this application, combined with Figures 1 to 5 This describes an embodiment of an electric flushing and sealing auxiliary device for dual-lumen PICC catheters. Specifically, the device is configured as a split structure, comprising three components: a fixing pad 1, a synchronization plate 6, and an intermittent transmission assembly 7. Through the transmission assembly 7 and the propulsion assembly 9, when the diameter of the needle tube 4 changes, the position of the cylindrical block 93 on the propulsion assembly 9 can be adjusted to match the diameter of the needle tube 4. Simultaneously, the transmission assembly 7 can also be adaptively adjusted according to the diameter of the needle tube, thus facilitating use.

[0033] Please refer to Figures 1 to 5 The dual-lumen PICC catheter electric flushing and sealing auxiliary device includes: a fixing pad 1, an intermittent transmission assembly 7, and a propulsion assembly 9;

[0034] At least one fixing buckle 5 is fixed on the upper end face of the fixing pad 1, and a needle tube 4 is fixed on the inner side of the fixing buckle 5. A needle handle 41 is sealed and slidably fitted on the inner side of the needle tube 4. A synchronization plate 6 is engaged on the outer side of the needle handle 41. A pushing component 9 is fixed on the upper end of the synchronization plate 6. A dustproof box 10 is fixed on the outer side of the pushing component 9. A transmission component 7 is slidably arranged on the inner side of the dustproof box 10. A servo motor 8 that penetrates the dustproof box 10 is arranged on the side wall of the dustproof box 10.

[0035] The propulsion assembly 9 includes a support plate 91, a through hole 92, and a cylindrical block 93. A rectangular groove 901 is provided on the inner side of the support plate 91, and a through hole 92 is provided on the inner side of the rectangular groove 901, which penetrates the support plate 91. The cylindrical block 93 is engaged on the inner side of the through hole 92.

[0036] In use, open the retaining clip 5 and place the needle tube 4 inside the retaining clip 5. Then close the retaining clip 5 to restrict the needle tube 4. The wing-shaped structure of the needle tube 4 rests against the side of the retaining clip 5 away from the needle tip, thereby increasing the supporting force of the retaining clip 5 on the needle tube 4. This prevents the needle tube 4 from sliding downwards when the needle handle 41 is pushed inwards for injection. If the needle tube 4 slides downwards with the needle handle 41 during injection, it can easily reduce the relative displacement between the needle handle 41 and the needle tube 4, making it difficult to inject into the blood vessel in a single pulse during the pulse-like compression. Insufficient injected fluid increases injection time and patient discomfort. Multiple needle handles 41 are secured to the outer side with a synchronization plate 6, the upper end of which is fixedly connected to the advance assembly 9. When dealing with needles 4 of different diameters, the cylindrical block 93 can be inserted into the corresponding perforation 92 before inserting the support plate 91 into the dust box 10. If using a larger diameter needle 4, the advance length of the needle handle 41 needs to be reduced each time the same volume of solution is injected; that is, the distance between two adjacent cylindrical blocks 93 needs to be reduced. For example, the original distance between two cylindrical blocks 93 could be reduced by one perforation 92. When the diameter of the needle tube 4 increases, the two cylindrical blocks 93 can be placed adjacent to each other; conversely, the number of perforations 92 between the two cylindrical blocks 93 is increased to adaptively adjust the diameter of the needle tube 4. Simultaneously, the advancing length of the transmission assembly 7 can be adjusted in stages according to the distance between the cylindrical blocks 93. This allows the transmission assembly 7 to rotate when the servo motor 8 rotates, and the transmission assembly 7 passes through the support plate 91 and abuts against the front cylindrical blocks 93, moving forward sequentially. This, in turn, moves the support plate 91, the synchronization plate 6, and multiple needle handles 41 towards the side closer to the needle tube 4. It can simultaneously inject the medication from multiple syringes 4 into the patient's body to complete the injection. At the same time, the number of advances is controlled by the number of cylindrical blocks 93 in the support plate 91. When all the cylindrical blocks 93 are pushed out, if the servo motor 8 does not stop in time, the transmission component 7 will not contact the cylindrical blocks 93 when the servo motor 8 is idling because there are no cylindrical blocks 93 on the rear side of the support plate 91. Therefore, it will not drive the support plate 91 to continue to push forward. This can limit the forward push of the support plate 91 if the servo motor 8 is not turned off in time, which is beneficial to the protection of the human body.

[0037] A handle 2 is fixed to the upper end of the fixing pad 1, and a control panel 3 is provided on the upper surface of the fixing pad 1. The fixing pad 1 is made of a flexible material.

[0038] The fixing pad 1 is a cloth bag sewn from fiber material, and the thickness of the cloth bag can be sewn into multiple layers to improve the deformation strength of the surface of the fixing pad 1. Then, cotton is filled into the cloth bag to make a flexible fixing pad 1. When in use, the handle 2 is held by one hand, and the fixing pad 1 is quickly unfolded by holding the handle 2. It is easy to take out through the handle 2. The fixing pad 1 is made of flexible material, which can hide the wire between the servo motor 8 and the control panel 3 inside the fixing pad 1. The wire can be protected by the outer cloth bag. At the same time, the fixing pad 1 can also provide support for the fixing buckle 5 and the dust box 10.

[0039] The fixing buckle 5 includes a rotating seat 51, an arc-shaped groove 52 and a fixing seat 53. The upper end surface of the fixing pad 1 is fixed by the rotating seat 51, and the outer side of the rotating seat 51 is rotatably connected to the arc-shaped groove 52. The fixing seat 53 is engaged on the side of the arc-shaped groove 52 away from the rotating seat 51.

[0040] An elastic protrusion 521 is fixed on the side of the arc-shaped slot 52 near the fixing base 53, and a slot 531 adapted to the elastic protrusion 521 is provided at the upper end of the fixing base 53.

[0041] In use, the arc-shaped slot 52 is attached to the outside of the needle tube 4 with the rotating seat 51 as the center. Then, the elastic protrusion 521 of the arc-shaped slot 52 is inserted into the slot 531 of the fixing seat 53. When inserted, the slot 531 undergoes elastic deformation and expands outward so that the elastic protrusion 521 can be inserted into the slot 531. This uses friction to restrict the position of the needle tube 4 and the elastic locking method facilitates the quick fixation of the needle tube 4, making it convenient to use.

[0042] An arc-shaped piece 522 is fitted inside the arc-shaped slot 52, and an elastic piece 523 is fixed between the arc-shaped piece 522 and the arc-shaped slot 52.

[0043] In use, the elastic piece 523 protrudes downward from the middle. When the arc-shaped piece 522 is in its original length state, there is a margin of movement between the arc-shaped piece 522 and the arc-shaped groove 52. When a thicker needle tube 4 is replaced, the outer wall of the needle tube 4 can drive the arc-shaped piece 522 to move upward and drive the elastic piece 523 to compress upward, thereby increasing the space below the arc-shaped groove 52, which makes it easier to fix needle tubes 4 of different diameters.

[0044] The transmission assembly 7 includes a connecting rod 71, a telescopic rod 72, a slider 73, and a support structure 74. The output end of the servo motor 8 is fixed with the telescopic rod 72, and one end of the telescopic rod 72 is rotatably connected to the connecting rod 71. The end of the connecting rod 71 away from the telescopic rod 72 is rotatably connected to the slider 73, and the outer side of the slider 73 is provided with the support structure 74.

[0045] The support structure 74 includes a guide rail 741, a lever 742, and a baffle 743. The guide rail 741 is fixed to the inner wall of the dust box 10, and the guide rail 741 is adapted to the slider 73. The lever 742 is rotatably connected to the front end face of the slider 73, and the baffle 743 is fixed to the lower end of the lever 742.

[0046] In use, when the servo motor 8 rotates, it drives the telescopic rod 72 to rotate concentrically with the output end of the servo motor 8. Then, it drives one end of the connecting rod 71 to rotate concentrically with the telescopic rod 72. The end of the connecting rod 71 away from the telescopic rod 72 is restricted by the slider 73, thus forming a crank-connecting rod structure. This causes the slider 73 to slide linearly along the guide rail 741. The slider 73 first slides towards the side closer to the servo motor 8. At this time, the paddle 742 is pushed up by the cylindrical block 93 on the rear side and rotates along the hinge connected to the slider 73. Until it moves to the rear of the corresponding cylindrical block 93, the slider 73 slides away from the end of the servo motor 8. At this time, the front end of the paddle 742 abuts against the cylindrical block 93 in front, and the paddle 742 is restricted from rotating by the stop bar 743. When the slider 73 moves forward, the paddle 742 can drive the cylindrical block 93 to move forward together, thereby pushing the needle handle 41 forward. The transmission component 7 changes the continuous rotation of the servo motor 8 into intermittent propulsion, thereby replacing the action of pulse injection by the human hand.

[0047] The telescopic rod 72 includes a support rod 721, an adjusting rod 722, and a fixing rod 723. The output end of the servo motor 8 is fixed to the support rod 721, and the adjusting rod 722 is slidably connected to the inner side of the support rod 721. Multiple positioning holes 7221 are provided on the outer side of the adjusting rod 722, and the fixing rod 723 is provided through the support rod 721 and the adjusting rod 722.

[0048] In use, the telescopic rod 72 is assembled, the adjusting rod 721 is inserted into the support rod 721, and the desired advancement length is selected according to the thickness of the needle tube 4. If the needle tube 4 is thicker and the advancement length is shorter, the distance of the adjusting rod 721 inserted into the support rod 721 is increased. Then, the fixing rod 723 is inserted into the corresponding positioning hole 7221 to restrict the position. When the fixing rod 723 is inserted too deeply, the length of the telescopic rod 72 is shortened. When the servo motor 8 rotates at the same time, the concentric circle diameter of the end of the adjusting rod 722 away from the servo motor 8 is shortened, which shortens the movement path of the slider 73 and thus reduces the advancement distance. By using different positioning holes 7221 corresponding to different needle tube thicknesses, it is convenient to quickly position the needle tube 4 when it is changed, thus facilitating adjustment.

[0049] The electric flushing and sealing auxiliary device for dual-lumen PICC catheters provided by this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0050] In use, open the fixing buckle 5 and place the needle tube 4 inside the fixing buckle 5. Place the arc-shaped groove 52 around the rotating seat 51 and fasten it to the outside of the needle tube 4. Then insert the elastic protrusion 521 of the arc-shaped groove 52 into the groove 531 of the fixing seat 53 to close the fixing buckle 5 and restrict the needle tube 4.

[0051] Then, fix multiple needle handles 41 to the upper end of the synchronization plate 6. At this time, according to the diameter of the needle tube 4, insert the cylindrical block 93 into the corresponding through hole 92, then insert the adjusting rod 722 into the corresponding support rod 721, and insert the fixing rod 723 into the corresponding positioning hole 7221.

[0052] In use, when the servo motor 8 rotates, it drives the telescopic rod 72 to rotate concentrically with the output end of the servo motor 8. Then, it drives one end of the connecting rod 71 to rotate concentrically with the telescopic rod 72. The end of the connecting rod 71 away from the telescopic rod 72 is restricted by the slider 73, which drives the slider 73 to slide linearly along the guide rail 741. The slider 73 first slides towards the side closer to the servo motor 8. At this time, the paddle 742 is pushed up by the cylindrical block 93 on the rear side and rotates along the hinge connected to the slider 73 until it moves to the rear of the corresponding cylindrical block 93. At this time, the slider 73 slides away from the end of the servo motor 8. At this time, the front end of the paddle 742 abuts against the cylindrical block 93 in front, and the stop bar 743 restricts the rotation of the paddle 742. When the slider 73 moves forward, the paddle 742 can drive the cylindrical block 93 to move forward together, thereby pushing the needle handle 41 forward. The transmission component 7 changes the continuous rotation of the servo motor 8 into intermittent advancement, thereby replacing the action of pulse injection by the human hand.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A dual-lumen PICC catheter electric flushing and sealing auxiliary device, characterized in that, include: Fixed pad (1), intermittent transmission assembly (7), and propulsion assembly (9); At least one fixing buckle (5) is fixed on the upper end surface of the fixing pad (1), and a needle tube (4) is fixed on the inner side of the fixing buckle (5). A needle handle (41) is sealed and slidably fitted on the inner side of the needle tube (4). A synchronization plate (6) is engaged on the outer side of the needle handle (41). A propulsion assembly (9) is fixed on the upper end of the synchronization plate (6). A dustproof box (10) is fixed on the outer side of the propulsion assembly (9). A transmission assembly (7) is slidably arranged on the inner side of the dustproof box (10). A servo motor (8) penetrating the dustproof box (10) is arranged on the side wall of the dustproof box (10). The propulsion assembly (9) includes a support plate (91), a perforation (92) and a cylindrical block (93). A rectangular groove (901) is provided on the inner side of the support plate (91), and a perforation (92) is provided on the inner side of the rectangular groove (901) to penetrate the support plate (91). The cylindrical block (93) is engaged on the inner side of the perforation (92).

2. The electric flushing and sealing auxiliary device for dual-lumen PICC catheters according to claim 1, characterized in that, The upper end of the fixing pad (1) is fixed with a handle (2), and the upper surface of the fixing pad (1) is provided with a control panel (3), and the material of the fixing pad (1) is a flexible material.

3. The electric flushing and sealing auxiliary device for dual-lumen PICC catheters according to claim 1, characterized in that, The fixing buckle (5) includes a rotating seat (51), an arc-shaped groove (52) and a fixing seat (53). The upper end surface of the fixing pad (1) is fixed by the rotating seat (51), and the outer side of the rotating seat (51) is rotatably connected to the arc-shaped groove (52). The side of the arc-shaped groove (52) away from the rotating seat (51) is engaged with the fixing seat (53).

4. The electric flushing and sealing auxiliary device for dual-lumen PICC catheters according to claim 3, characterized in that, The arc-shaped slot (52) has an elastic protrusion (521) fixed on the side near the fixed base (53), and the upper end of the fixed base (53) has a slot (531) adapted to the elastic protrusion (521).

5. The electric flushing and sealing auxiliary device for dual-lumen PICC catheters according to claim 4, characterized in that, An arc-shaped piece (522) is fitted inside the arc-shaped slot (52), and an elastic piece (523) is fixed between the arc-shaped piece (522) and the arc-shaped slot (52).

6. The electric flushing and sealing auxiliary device for dual-lumen PICC catheters according to claim 1, characterized in that, The transmission assembly (7) includes a connecting rod (71), a telescopic rod (72), a slider (73), and a support structure (74). The output end of the servo motor (8) is fixed with the telescopic rod (72), and one end of the telescopic rod (72) is rotatably connected to the connecting rod (71). The end of the connecting rod (71) away from the telescopic rod (72) is rotatably connected to the slider (73), and the outside of the slider (73) is provided with a support structure (74).

7. The electric flushing and sealing auxiliary device for dual-lumen PICC catheters according to claim 6, characterized in that, The support structure (74) includes a guide rail (741), a lever (742), and a stop bar (743). The inner wall of the dust box (10) is fixed with the guide rail (741), and the guide rail (741) is adapted to the slider (73). The front end face of the slider (73) is rotatably connected with the lever (742), and the lower end of the lever (742) is fixed with the stop bar (743).

8. The electric flushing and sealing auxiliary device for dual-lumen PICC catheters according to claim 6, characterized in that, The telescopic rod (72) includes a support rod (721), an adjusting rod (722), and a fixing rod (723). The output end of the servo motor (8) is fixed to the support rod (721), and the adjusting rod (722) is slidably connected to the inner side of the support rod (721). The adjusting rod (722) has multiple positioning holes (7221) on its outer side, and the fixing rod (723) passes through the support rod (721) and the adjusting rod (722).

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