Reinforced seal negative pressure switch knob

Abstract

The utility model relates to the technical field of closed sputum suction tube, and disclose reinforced sealing negative pressure switch knob, this reinforced sealing negative pressure switch knob, including negative pressure switch seat, fixedly installed with connecting pipe and installation pipe on the negative pressure switch seat, be provided with switch subassembly on the negative pressure switch seat, switch subassembly includes spherical locating block. This reinforced sealing negative pressure switch knob, in order to make the device satisfy the clinical use demand of closed sputum suction tube and other negative pressure system, by being provided with switch subassembly, the assembly cooperation annular muscle on switch post adopts ABS material injection molding, with the auxiliary groove of negative pressure switch seat is tight fit, through the embedding of multiple groups of sliding ball in annular groove, the contact area of switch post and the inner wall of base is greatly reduced, reduces friction damage, prolongs product life, sealing cover passes through buckle sliding slot and card block sliding fit, spherical locating block and auxiliary locating block accurate alignment, ensure the positioning accuracy when switch adjustment.

Description

Technical Field

[0001] This utility model relates to the field of closed suction catheter technology, specifically a reinforced and sealed negative pressure switch knob. Background Technology

[0002] In closed suction catheter negative pressure systems in the medical field, the negative pressure switch knob is the core component for controlling suction and drainage operations. It is widely used in operating room fluid and blood suction, ICU patient airway secretion clearance, wound care exudate drainage, and other scenarios.

[0003] The core structure of this knob consists of a main knob and a reinforced contact layer. The main body and the reinforcement are integrally injection molded and made of ABS engineering plastic, which has the characteristics of impact resistance and easy molding. The reinforcement structure replaces the traditional full-circumference contact, transforming the contact between the knob and the base into line contact or point contact between the ribs and the inner wall, greatly reducing the contact area and reducing rotational friction. Under the tight fit, the ABS material reinforcement not only effectively seals the negative pressure channel, but also buffers the operating force through the toughness of the material.

[0004] However, the above-mentioned equipment has obvious shortcomings in use. In order to prevent excessive operating force and excessive contact area between the negative pressure switch knob and the base, the inner wall of the negative pressure switch base will be damaged due to continuous friction over time, thus affecting the overall airtightness. Therefore, we propose a reinforced and sealed negative pressure switch knob. Utility Model Content

[0005] The purpose of this invention is to provide a reinforced and sealed negative pressure switch knob to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A reinforced and sealed negative pressure switch knob includes a negative pressure switch base, on which a connecting pipe and a mounting pipe are fixedly installed. A switch assembly is provided on the negative pressure switch base, and the switch assembly includes: A spherical positioning block is fixedly installed on the outer wall of the negative pressure switch base. A locking block is fixedly installed on the negative pressure switch base. An auxiliary groove and an annular groove are opened inside the negative pressure switch base. A switch post is disposed inside the negative pressure switch base. A sealing cover is fixedly installed on the switch post. A snap-fit ​​groove is provided on the sealing cover. A knob handle is fixedly installed on the sealing cover. An auxiliary positioning block is fixedly installed at the bottom of the sealing cover. An annular rib is fixedly installed on the switch post, and a sliding ball is rotatably installed on the annular rib. A connection hole is provided on the switch post.

[0007] In a further embodiment, multiple sets of the spherical positioning block, locking block, auxiliary groove, annular groove, snap-fit ​​sliding groove, auxiliary positioning block, annular rib, and sliding ball are provided.

[0008] In a further embodiment, the annular groove is disposed inside the auxiliary groove, the annular rib is disposed inside the auxiliary groove, the sliding ball is disposed inside the annular groove, and the connecting hole is disposed between multiple sets of annular ribs.

[0009] In a further embodiment, the locking block slides inside the locking groove, the spherical positioning block corresponds horizontally to the auxiliary positioning block, the connecting hole corresponds to the position of the connecting pipe and the mounting pipe, and the annular rib is injection molded from ABS material.

[0010] In a further embodiment, a support assembly is provided on the negative pressure switch base. The support assembly includes a spring, one end of which is fixedly installed inside the negative pressure switch base, and the other end of which is fixedly installed with a circular plate. A mounting block is fixedly installed at the bottom of the circular plate, and a support ball is rotatably installed on the circular plate and the mounting block.

[0011] In a further embodiment, multiple sets of springs and support balls are provided, with the multiple sets of support balls attached to the bottom of the switch column.

[0012] In a further embodiment, the spring, circular plate, mounting block, and support ball are disposed inside the negative pressure switch base.

[0013] Compared with the prior art, this utility model provides a reinforced and sealed negative pressure switch knob, which has the following beneficial effects: 1. This reinforced and sealed negative pressure switch knob, designed to meet the clinical requirements of negative pressure systems such as closed suction catheters, features a switch assembly. This assembly, along with the annular rib on the switch post, is injection molded from ABS material and fits tightly with the auxiliary groove of the negative pressure switch base. Multiple sets of sliding balls are embedded in the annular groove, significantly reducing the contact area between the switch post and the inner wall of the base, minimizing friction damage, and extending the product's lifespan. The sealing cover slides with a snap-fit ​​groove and a locking block, ensuring precise alignment between the spherical positioning block and the auxiliary positioning block, guaranteeing accurate positioning during switch adjustment. Simultaneously, the tight fit structure of the annular rib enhances airtightness, preventing negative pressure loss. The knob handle utilizes smooth sliding ball motion.

[0014] 2. The reinforced and sealed negative pressure switch knob is equipped with a support component to reduce the risk of malfunction during clinical use. This component, together with multiple sets of springs evenly distributed inside the negative pressure switch base, forms elastic support for the bottom of the switch column through a circular plate and mounting block. Combined with the sliding ball transmission of the switch component, a double friction-reducing structure is formed, which reduces the rotational resistance of the switch and makes operation easier. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model in its open state; Figure 2 This is a schematic diagram of the overall structure of this utility model in its closed state; Figure 3 This is a schematic diagram of the negative pressure switch base structure of this utility model; Figure 4 This is a cross-sectional view of the negative pressure switch base structure of this utility model; Figure 5 This is a schematic diagram of part of the structure of this utility model; Figure 6 This is a cross-sectional view of the support component structure of this utility model.

[0016] Explanation of icon numbers: 1. Negative pressure switch base; 2. Connecting pipe; 3. Mounting pipe; 4. Switch assembly; 41. Spherical positioning block; 42. Locking block; 43. Auxiliary groove; 44. Annular groove; 45. Switch post; 46. Sealing cover; 47. Snap-on slide groove; 48. Knob handle; 49. Auxiliary positioning block; 410. Annular rib; 411. Sliding ball; 412. Connecting hole; 5. Support assembly; 51. Spring; 52. Circular plate; 53. Mounting block; 54. Support ball. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0019] Please see Figures 1-6 This utility model provides a technical solution: The reinforced and sealed negative pressure switch knob includes a negative pressure switch base 1, on which a connecting pipe 2 and a mounting pipe 3 are fixedly installed.

[0020] In one embodiment of this utility model, a switch assembly 4 is provided on a negative pressure switch base 1. The switch assembly 4 includes a spherical positioning block 41, which is fixedly installed on the outer wall of the negative pressure switch base 1. A locking block 42 is fixedly installed on the negative pressure switch base 1. An auxiliary groove 43 and an annular groove 44 are provided inside the negative pressure switch base 1. A switch post 45 is disposed inside the negative pressure switch base 1. A sealing cover 46 is fixedly installed on the switch post 45. A snap-fit ​​sliding groove 47 is provided on the sealing cover 46. A knob handle 48 is fixedly installed on the sealing cover 46. An auxiliary positioning block 49 is fixedly installed at the bottom of the sealing cover 46. An annular rib 410 is fixedly installed on the switch post 45. A sliding ball is rotatably installed on the annular rib 410. 411. A connection hole 412 is provided on the switch post 45. Multiple sets of spherical positioning block 41, locking block 42, auxiliary groove 43, annular groove 44, snap-fit ​​slide groove 47, auxiliary positioning block 49, annular rib 410 and sliding ball 411 are provided. The annular groove 44 is located inside the auxiliary groove 43. The annular rib 410 is located inside the auxiliary groove 43. The sliding ball 411 is located inside the annular groove 44. The connection hole 412 is located between multiple sets of annular ribs 410. The locking block 42 slides inside the snap-fit ​​slide groove 47. The spherical positioning block 41 and the auxiliary positioning block 49 are horizontally aligned. The connection hole 412 is aligned with the positions of the connecting pipe 2 and the mounting pipe 3. The annular rib 410 is injection molded from ABS material.

[0021] In this embodiment, during assembly, the switch post 45 is placed inside the negative pressure switch base 1, aligning the snap-fit ​​groove 47 on the sealing cover 46 with the snap block 42 on the negative pressure switch base 1 and sliding them together to complete the initial installation and circumferential limiting. During operation, the user rotates the knob handle 48, causing the sealing cover 46 and the switch post 45 to rotate together. The annular rib 410, made of ABS material injection molded on the switch post 45, is in a tight fit with the auxiliary groove 43 inside the negative pressure switch base 1, ensuring the airtightness of the joint surface and effectively preventing negative pressure leakage. At the same time, multiple sets of sliding... The ball 411 is embedded and rolls in the annular groove 44 of the negative pressure switch base 1, which transforms the sliding friction between the switch post 45 and the negative pressure switch base 1 into rolling friction, greatly reducing the contact area and frictional resistance, reducing wear, and extending service life. When rotated to a specific position, the auxiliary positioning block 49 at the bottom of the sealing cover 46 corresponds to the spherical positioning block 41 on the outer wall of the negative pressure switch base 1, providing a clear positioning feel and ensuring that the connecting hole 412 on the switch post 45 can be aligned with or offset from the connecting pipe 2 and the mounting pipe 3, thereby realizing the opening and closing of the negative pressure channel. The entire operation process is driven by the knob handle 48.

[0022] In one embodiment of this utility model, a support component 5 is provided on the negative pressure switch base 1. The support component 5 includes a spring 51. One end of the spring 51 is fixedly installed inside the negative pressure switch base 1, and a circular plate 52 is fixedly installed on the other end of the spring 51. An mounting block 53 is fixedly installed on the bottom of the circular plate 52. Support balls 54 are rotatably installed on the circular plate 52 and the mounting block 53. Multiple sets of springs 51 and support balls 54 are provided. Multiple sets of support balls 54 are attached to the bottom of the switch post 45. The springs 51, circular plates 52, mounting blocks 53 and support balls 54 are provided inside the negative pressure switch base 1.

[0023] In this embodiment, multiple sets of springs 51 apply a uniform upward elastic force to the circular plate 52 inside the negative pressure switch base 1. This force is transmitted to the support ball 54 through the mounting block 53, ensuring that the support ball 54 always adheres to and supports the bottom of the switch post 45. This design provides stable elastic support for the switch post 45 and together with the sliding ball 411 in the switch assembly 4, forms a double friction-reducing structure. This structure not only compensates for the minor tolerances that may exist in the machining and assembly of parts, ensuring that the switch post 45 is subjected to balanced force when rotating and avoiding jamming, but also further reduces the overall rotational resistance, making operation more convenient and effortless.

[0024] All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. In addition, the standard parts are all conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art.

[0025] It should be noted that the above electrical components are all existing technology products. Those skilled in the art should select, install, and complete the circuit debugging work according to the needs of use to ensure that each electrical appliance can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here. The supporting structures of the hydraulic drive structure appearing in this application document, such as hydraulic tanks and hydraulic pumps, are existing equipment and will not be described in detail here.

[0026] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A reinforced and sealed negative pressure switch knob, comprising a negative pressure switch base (1), wherein a connecting pipe (2) and a mounting pipe (3) are fixedly installed on the negative pressure switch base (1), characterized in that: The negative pressure switch base (1) is provided with a switch assembly (4), the switch assembly (4) including: A spherical positioning block (41) is fixedly installed on the outer wall of the negative pressure switch seat (1). A locking block (42) is fixedly installed on the negative pressure switch seat (1). An auxiliary groove (43) and an annular groove (44) are provided inside the negative pressure switch seat (1). A switch post (45) is located inside the negative pressure switch base (1). A sealing cover (46) is fixedly installed on the switch post (45). A snap-fit ​​groove (47) is provided on the sealing cover (46). A knob handle (48) is fixedly installed on the sealing cover (46). An auxiliary positioning block (49) is fixedly installed at the bottom of the sealing cover (46). A ring rib (410) is fixedly installed on the switch post (45). A sliding ball (411) is rotatably installed on the ring rib (410). A connection hole (412) is opened on the switch post (45).

2. The reinforced and sealed negative pressure switch knob according to claim 1, characterized in that: The spherical positioning block (41), the locking block (42), the auxiliary groove (43), the annular groove (44), the snap-fit ​​sliding groove (47), the auxiliary positioning block (49), the annular rib (410), and the sliding ball (411) are provided in multiple sets.

3. The reinforced and sealed negative pressure switch knob according to claim 1, characterized in that: The annular groove (44) is located inside the auxiliary groove (43), the annular rib (410) is located inside the auxiliary groove (43), the sliding ball (411) is located inside the annular groove (44), and the connecting hole (412) is located between multiple sets of annular ribs (410).

4. The reinforced and sealed negative pressure switch knob according to claim 1, characterized in that: The locking block (42) slides inside the locking groove (47), the spherical positioning block (41) corresponds to the horizontal position of the auxiliary positioning block (49), and the connecting hole (412) corresponds to the position of the connecting pipe (2) and the mounting pipe (3).

5. The reinforced and sealed negative pressure switch knob according to claim 1, characterized in that: The negative pressure switch base (1) is provided with a support component (5), the support component (5) includes a spring (51), one end of the spring (51) is fixedly installed inside the negative pressure switch base (1), and the other end of the spring (51) is fixedly installed with a circular plate (52). A mounting block (53) is fixedly installed at the bottom of the circular plate (52), and a support ball (54) is rotatably installed on the circular plate (52) and the mounting block (53).

6. The reinforced and sealed negative pressure switch knob according to claim 5, characterized in that: The spring (51) and the support ball (54) are provided in multiple sets, and the multiple sets of the support ball (54) are attached to the bottom of the switch column (45).

7. The reinforced and sealed negative pressure switch knob according to claim 5, characterized in that: The spring (51), circular plate (52), mounting block (53) and support ball (54) are disposed inside the negative pressure switch base (1).

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