Sealing structure for control knob of irrigation timer

Abstract

The utility model discloses a sealing structure for a control knob of an irrigation timer, and relates to the technical field of irrigation timers. Comprising a sealing ring, and the sealing ring is arranged between a control knob and a timer shell in a sleeving mode; and a connecting lip, a water retaining lip and a sealing lip are respectively arranged at the top, the bottom and the inside of the sealing ring. According to the external sealing anti-seepage design, the sealing ring is externally arranged between the timer shell and the control knob, a water retaining lip inclined pressing structure is matched, the path that water flow permeates into the shell in the axial direction of the knob is blocked, and the risk that accumulated water on the top of a traditional built-in sealing ring is squeezed into the timer shell due to the downward pressure of the control knob is effectively avoided; the sealing lips are in elastic pressing type contact, when the control knob rotates, the sealing lips expand outwards to generate an avoiding space, rotation friction resistance is reduced, meanwhile, self-adaptive sealing is achieved through elastic recovery in a static state, operation smoothness and sealing durability are both considered, and through cooperation with the connecting lips of the three-level sealing barrier, the sealing effect is good. And the sealing performance between the control knob and the connector is further improved.

Description

Technical Field

[0001] This utility model relates to the field of irrigation timer technology, specifically to a sealing structure for an irrigation timer control knob. Background Technology

[0002] An irrigation timer is an electronic device used for automated control of irrigation systems. It can start / stop irrigation equipment (such as water pumps, solenoid valves, etc.) based on preset time or sensor data. It is widely used in agriculture, landscaping, home gardens and other fields to help achieve precision irrigation, save water resources and labor costs.

[0003] In existing technologies, the sealing method of irrigation timer control knobs generally involves directly sealing the outside of the timer control lever with a sealing ring on the inner wall of the housing. This type of internal sealing ring has poor sealing effect, and each time the knob is turned, a downward force is easily generated, causing water accumulated on the top of the sealing ring to be squeezed into the timer housing, resulting in water leakage and damage, and the performance is not ideal. Utility Model Content

[0004] This invention provides a sealing structure for an irrigation timer control knob to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for an irrigation timer control knob, comprising a sealing ring, wherein the sealing ring is sleeved between the control knob and the timer housing;

[0006] The sealing ring is provided with a connecting lip, a water-blocking lip, and a sealing lip at its top, bottom, and inside, respectively.

[0007] Furthermore, the connecting lip includes connecting lip one, connecting lip two, and connecting lip three.

[0008] Furthermore, the outer ring of the connecting lip three is tapered with a small top diameter and a large bottom diameter, and the sealing lip is located inside the connecting lip three.

[0009] Furthermore, the inner ring of the top of the second connecting lip is a cone with a large top diameter and a small bottom diameter, and the outer ring of the top of the second connecting lip is a cone with a small bottom diameter and a large bottom diameter.

[0010] Furthermore, the bottom of the water-blocking lip contacts the top of the timer housing, and the water-blocking lip is inclined.

[0011] Furthermore, a connector is provided on the top of the timer housing, and the inside of the sealing lip is fitted with the outside of the connector.

[0012] Furthermore, the control knob is internally provided with a stepped groove that engages with the connecting lip.

[0013] Furthermore, the interior of the connecting lip is fitted into the exterior of the stepped slot.

[0014] Furthermore, the control knob has a knob shaft inside that extends to the inside of the connector and is connected to the timer control lever.

[0015] Furthermore, the inner ring of the connecting lip is provided with several grooves.

[0016] Compared with the prior art, this utility model provides a sealing structure for an irrigation timer control knob, which has the following advantages:

[0017] The irrigation timer control knob sealing structure features an external sealing design to prevent water seepage. The sealing ring is placed externally between the timer housing and the control knob. Combined with the inclined pressing structure of the water-blocking lip, it blocks the path of water flow along the knob axis into the housing. This effectively avoids the risk of water accumulation at the top being squeezed into the timer housing due to the downward pressure of the control knob, as is common with traditional built-in sealing rings. The sealing lip has an elastic pressing contact. When the control knob is rotated, the sealing lip expands outward to create clearance space, reducing rotational friction resistance. At the same time, it achieves self-adaptive sealing through elastic recovery when static, balancing smooth operation and durable sealing. Combined with the connecting lip of the three-level sealing barrier, it further improves the sealing performance between the control knob and the connector. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the timer housing structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the control knob structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the sealing ring structure of this utility model;

[0022] Figure 5 This is a cross-sectional view of the sealing ring structure of this utility model.

[0023] In the diagram: 1. Sealing ring; 11. Connecting lip one; 12. Connecting lip two; 121. Groove; 13. Connecting lip three; 14. Water-blocking lip; 15. Sealing lip; 2. Control knob; 21. Stepped slot; 22. Knob shaft; 3. Timer housing; 31. Connector. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-5 This utility model discloses a sealing structure for an irrigation timer control knob, including a sealing ring 1, which is sleeved between the control knob 2 and the timer housing 3.

[0026] The sealing ring 1 is provided with a connecting lip, a water-blocking lip 14, and a sealing lip 15 at its top, bottom, and inside, respectively.

[0027] Specifically, the connecting lips include connecting lip one 11, connecting lip two 12, and connecting lip three 13.

[0028] In this embodiment, the three connecting lips ensure the stability and sealing of the connection between the sealing ring 1 and the control knob 2.

[0029] Specifically, the outer ring of the connecting lip 3 13 is a cone shape with a small top diameter and a large bottom diameter, and the sealing lip 15 is located inside the connecting lip 3 13.

[0030] In this embodiment, there are no fewer than two sealing lips 15. The sealing lips 15 are elastically pressed onto the outside of the connector 31. The outer ring of the connecting lip 13 is tapered with a small top diameter and a large bottom diameter. This design allows for clearance between the outer ring of the connecting lip 13 and the inner ring of the stepped groove 21. When the control knob 2 is rotated, the control knob 2 drives the sealing ring 1 to rotate. Of the two sealing lips 15, the lowermost sealing lip 15 is not opposite to the clearance space and elastically hugs the connector 31 to maintain good dynamic sealing. The uppermost sealing lip 15 is opposite to the clearance space, so that when the sealing ring 1 drives the uppermost sealing lip 15 to rotate outside the connector 31, it can expand outward to make clearance, making rotation easier and providing a good sealing effect when static.

[0031] Specifically, the inner ring of the top of the connecting lip 2 12 is a cone with a large top diameter and a small bottom diameter, and the outer ring of the top of the connecting lip 2 12 is a cone with a small bottom diameter and a large bottom diameter.

[0032] In this embodiment, the inverted conical design of the inner and outer rings at the top of the connecting lip 22 facilitates insertion into the interior of the stepped slot 21, making assembly more convenient, and also provides a sealing effect that tightens as it is inserted.

[0033] Specifically, the bottom of the water-blocking lip 14 is in contact with the top of the timer housing 3, and the water-blocking lip 14 is inclined.

[0034] In this embodiment, the water-blocking lip 14 mainly serves to seal the water flow to the connector 31. The inclined water-blocking lip 14 ensures the stability of the continuous contact between the water-blocking lip 14 and the timer housing 3.

[0035] Specifically, the top of the timer housing 3 is provided with a connector 31, the inside of the sealing lip 15 is sleeved with the outside of the connector 31, the inside of the control knob 2 is provided with a stepped groove 21 that is sleeved with the second connecting lip 12, and the inside of the first connecting lip 11 is sleeved with the outside of the stepped groove 21.

[0036] In this embodiment, the second connecting lip 12 is inserted into the interior of the stepped slot 21 through a conical structure, and the first connecting lip 11 is fitted onto the outside of the stepped slot 21 to seal the interior of the connecting slot.

[0037] Specifically, the control knob 2 has a knob shaft 22 inside which the bottom end extends into the connector 31 and is connected to the timer control lever.

[0038] In this embodiment, the bottom end of the knob shaft 22 is inserted into the inside of the timer control lever through the connector 31 and then secured with screws, making the connection more stable.

[0039] Specifically, the inner ring of the connecting lip 12 is also provided with several grooves 121.

[0040] In this embodiment, the groove 121 disperses the contact area between the inner wall of the connecting lip 22 and the inner wall of the stepped groove 21, thereby reducing the actual contact area and reducing friction, which makes it easier for the connecting lip 22 to be inserted into the interior of the stepped groove 21. Furthermore, the groove 121 is located in the inner ring of the connecting lip 22 and will not affect the sealing performance between the sealing ring 1 and the control knob 2.

[0041] In summary, the sealing structure of this irrigation timer control knob features an external sealing design to prevent water seepage. The sealing ring 1 is placed externally between the timer housing 3 and the control knob 2. Combined with the inclined pressing structure of the water-blocking lip 14, it blocks the path of water flow along the knob shaft 22 into the housing. This effectively avoids the risk of water accumulated at the top of the traditional built-in sealing ring 1 being squeezed into the timer housing 3 due to the downward pressure of the control knob 2. The sealing lip 15 has an elastic pressing contact. When the control knob 2 is rotated, the sealing lip 15 expands outward to create clearance space, reducing rotational friction resistance. At the same time, it achieves adaptive sealing through elastic recovery when static, balancing smooth operation and sealing durability. Combined with the connecting lip of the three-level sealing barrier, it further improves the sealing performance between the control knob 2 and the connector 31.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An irrigation timer control knob seal structure comprising a seal ring (1), characterized in that: The sealing ring (1) is sleeved between the control knob (2) and the timer housing (3); The top, bottom and inner part of the sealing ring (1) are respectively provided with a connecting lip, a water blocking lip (14) and a sealing lip (15).

2. An irrigation timer control knob seal structure as defined in claim 1, wherein: The connecting lip comprises a connecting lip one (11), a connecting lip two (12) and a connecting lip three (13).

3. An irrigation timer control knob seal structure as defined in claim 2, wherein: The outer ring of the connecting lip three (13) is tapered with a small top diameter and a large bottom diameter, and the sealing lip (15) is located at the inner side of the connecting lip three (13).

4. An irrigation timer control knob seal structure as defined in claim 2, wherein: The inner ring of the top of the connecting lip two (12) is tapered with a large top diameter and a small bottom diameter, and the outer ring of the top of the connecting lip two (12) is tapered with a small bottom diameter and a large bottom diameter.

5. An irrigation timer control knob seal structure as defined in claim 1, wherein: The bottom of the water blocking lip (14) is in contact with the top of the timer housing (3), and the water blocking lip (14) is arranged in an inclined manner.

6. An irrigation timer control knob seal structure as defined in claim 1, wherein: The top of the timer housing (3) is provided with a connecting head (31), and the inner part of the sealing lip (15) is sleeved with the outer part of the connecting head (31).

7. An irrigation timer control knob seal structure as defined in claim 2, wherein: The inner part of the control knob (2) is provided with a stepped clamping groove (21) sleeved with the connecting lip two (12).

8. An irrigation timer control knob seal structure as defined in claim 2, wherein: The inner part of the connecting lip one (11) is sleeved with the outer part of the stepped clamping groove (21).

9. An irrigation timer control knob seal structure as defined in claim 1, wherein: The inner part of the control knob (2) is provided with a knob shaft (22) extending to the inner part of the connecting head (31) and connected with a timer control rod.

10. An irrigation timer control knob seal structure as defined in claim 2, wherein: A plurality of grooves (121) are further arranged on the inner ring of the connecting lip two (12).

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