Floating ball switch
By incorporating an anti-sticking protrusion structure into the float switch, the problem of the float sticking and jamming with the probe in poor water quality environments is solved, enabling the float switch to operate stably in complex environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-03-10
AI Technical Summary
Existing float switches are prone to sticking or jamming with the probe due to scale, sediment or chemicals in environments with poor water quality, affecting the normal operation and reliability of the equipment.
An anti-sticking structure, including anti-sticking protrusions, is installed between the float and the probe to reduce the contact area and disperse friction, preventing the accumulation of scale and other impurities.
It effectively prevents the float from sticking and getting stuck to the probe, ensuring that the float slides smoothly in complex environments and improving the reliability and stability of the equipment.
Smart Images
Figure CN223986527U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid level controller technology, and in particular to float switches. Background Technology
[0002] A float switch senses changes in liquid level by floating a float on the liquid surface, thereby controlling the switch's operation. The float is typically fitted onto the outside of a probe and slides along the probe as the liquid level rises or falls. When the liquid level reaches a set height, the displacement of the float causes a change in the switch contacts, thus achieving automatic control of the equipment.
[0003] Existing float switches typically consist of two parts: a float and a probe. The float is fitted onto the outside of the probe and is usually hollow. It floats on the liquid surface by the buoyancy of air and works with a sensor or contact on the probe to detect and control the liquid level. This design is simple, low-cost, and suitable for various liquid environments, so it is widely used in industrial and domestic water level control.
[0004] However, in practical applications, the contact area between the float and the probe is relatively large, and there is a lack of effective anti-sticking structure between them. This problem is exacerbated, especially in environments with poor water quality. Factors such as scale, sediment, or surface tension of water can easily cause the float to stick to the surface of the probe. Specifically, scale or other sediments may form a film on the contact surface between the float and the probe. This film will generate resistance when the float moves, eventually causing the float to get stuck or unable to slide normally. In addition, some chemicals or particles in the water may deposit on the surface of the probe, further aggravating the friction between the float and the probe, and even causing the float to be unable to rise or fall at all.
[0005] This situation, especially in water sources with poor water quality or containing a large amount of particulate matter, will greatly reduce the reliability of the float switch, causing the equipment to malfunction for a long time or even be damaged. In addition, if the float is stuck or stuck, it will not only affect the normal operation of the equipment, but may also cause the water level to be too high or too low, increasing the risk of operation and maintenance costs.
[0006] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content
[0007] The above-mentioned technical problem addresses the issue that the existing float and probe have a large contact area and lack an effective anti-sticking structure, which makes them prone to sticking together due to water tension or scale buildup, thus preventing the float switch from functioning properly.
[0008] The technical solution adopted by this utility model to solve its technical problem is:
[0009] A float switch includes a probe and a float. The float has a movable through hole and is sleeved on the outside of the probe through the movable through hole. The float can reciprocate along the axial direction of the probe through the movable through hole. The probe has a mounting cavity for assembling a magnetic induction actuator. The float has a magnet that can sense the magnetic induction actuator. An anti-sticking structure is provided between the float and the probe. The anti-sticking structure includes at least one anti-sticking protrusion. The anti-sticking protrusion can maintain a certain distance between the inner wall of the movable through hole and the outer wall of the probe to reduce the contact area between them.
[0010] As described above, in the float switch, the anti-stick protrusion is provided on the outer wall of the probe and / or the inner wall of the movable through hole.
[0011] As described above, in the float switch, the anti-sticking protrusion is provided on the outer wall of the probe rod, and the probe rod is provided with a first limiting block and a second limiting block arranged at intervals, with the anti-sticking protrusion located between the first limiting block and the second limiting block.
[0012] As described above, in the float switch, the anti-stick protrusion extends along the length of the probe rod, one end of the anti-stick protrusion is close to or connected to the first limiting block, and the other end of the anti-stick protrusion is close to or connected to the second limiting block.
[0013] As described above, in the float switch, the anti-stick protrusion is provided on the inner wall of the movable through hole, and the length of the anti-stick protrusion is similar to or equal to the length of the movable through hole.
[0014] As described above, the float switch has multiple anti-stick protrusions, which are arranged circumferentially at intervals.
[0015] As described above, the float switch has multiple anti-stick protrusions, which are arranged axially at intervals.
[0016] As described above, the float switch has multiple anti-stick protrusions arranged in an array.
[0017] As described above, in the float switch, the cross-sectional shape of the anti-stick protrusion is polygonal, oblong, semi-circular, or slightly curved.
[0018] As described above, in the float switch, the probe has a circular cross-sectional shape, and the movable through hole has a circular cross-sectional shape; or, the probe has a polygonal cross-sectional shape, and the movable through hole has a polygonal cross-sectional shape.
[0019] The beneficial effects of this utility model are:
[0020] This utility model relates to the field of liquid level controller technology. It includes a probe and a float. The float has a movable through-hole and is fitted onto the outside of the probe through the through-hole. The float can reciprocate along the axial direction of the probe through the movable through-hole. An anti-sticking structure is provided between the float and the probe. The anti-sticking structure includes at least one anti-sticking protrusion. The anti-sticking protrusion effectively avoids large-area contact between the float and the probe surface, reducing the contact area and friction between them. This effectively reduces direct contact between the float and the probe and prevents the accumulation of scale and other impurities, allowing the float to slide more smoothly on the probe. Even in environments with poor water quality, the float switch can still work stably, improving its reliability in complex environments.
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0023] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;
[0024] Figure 3 for Figure 2 A cross-sectional view along line AA (the cross-sectional shape of the anti-adhesive protrusion is rectangular);
[0025] Figure 4 for Figure 2 A cross-sectional view along line AA (the cross-sectional shape of the anti-stick protrusion is triangular).
[0026] Figure 5 for Figure 2 A cross-sectional view along line AA (the cross-sectional shape of the anti-stick protrusion is semi-circular).
[0027] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of this utility model;
[0028] Figure 7 This is a schematic diagram of the structure of Embodiment 4 of this utility model;
[0029] Figure 8 This is a schematic diagram of the structure of Embodiment 6 of the present invention;
[0030] Figure 9 for Figure 8 A cross-sectional view along line BB (the cross-sectional shape of the anti-stick protrusion is rectangular);
[0031] Figure 10 for Figure 8A cross-sectional view along line BB (the cross-sectional shape of the anti-stick protrusion is semi-circular).
[0032] Figure 11 This is a schematic diagram of the structure of Embodiment 9 of this utility model. Detailed Implementation
[0033] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0034] Example 1:
[0035] like Figures 1 to 10 As shown, the float switch of this embodiment includes a probe 1 and a float 2. The float 2 is provided with a movable through hole 21. The float 2 is sleeved on the outside of the probe 1 through the movable through hole 21, and the float 2 can reciprocate along the axial direction of the probe 1 through the movable through hole 21. The probe 1 is provided with a mounting cavity for assembling a magnetic induction actuator. The float 2 is provided with a magnet that can be sensed by the magnetic induction actuator. An anti-sticking structure is provided between the float 2 and the probe 1. The anti-sticking structure includes at least one anti-sticking protrusion 3. The anti-sticking protrusion 3 can maintain a certain distance between the inner wall of the movable through hole 21 and the outer wall of the probe 1 to reduce the contact area between the two.
[0036] The anti-stick protrusion 3 effectively avoids large-area contact between the float and the probe surface, reducing the contact area between the float and the probe, and also reducing the friction between them. This effectively reduces direct contact between the float and the probe and prevents the accumulation of scale and other impurities, allowing the float to slide more smoothly on the probe. Even in environments with poor water quality, the float switch can still work stably, improving the reliability of the float switch in complex environments.
[0037] Preferably, the anti-sticking protrusion 3 is provided on the outer wall of the probe rod 1 and / or the inner wall of the movable through hole 21. Furthermore, the provision of the anti-sticking protrusion 3 greatly reduces the contact area between the float ball 2 and the probe rod 1. By providing the anti-sticking protrusion 3 on the outer wall of the probe rod 1 and / or the inner wall of the movable through hole 21, during the movement of the float ball, the anti-sticking protrusion 3 will contact a small part of the outer wall of the probe rod 1 and / or a small part of the inner wall of the movable through hole 21, rather than a large area of contact with the probe rod surface or the through hole wall. This can avoid prolonged contact between the float ball and the probe rod, thereby reducing adhesion problems caused by scale, impurity deposition, or surface tension.
[0038] Furthermore, the anti-stick protrusion 3 forms a physical barrier, allowing the float 2 to slide freely along the axial direction on the probe 1 without getting stuck due to scale or impurities. The float only contacts the protrusion, and the presence of the protrusion helps the float maintain a certain amount of movement space, ensuring that the float can float smoothly up and down and trigger the magnetic sensor to work.
[0039] Furthermore, by setting anti-sticking protrusions 3 on the outer wall of the probe or the inner wall of the movable through hole, the protrusion structure reduces the contact area, which can reduce the friction area between the float and the probe, prevent scale and impurities from depositing on the contact surface, and avoid excessive friction or adhesion between the float and the probe surface.
[0040] By setting the anti-stick protrusion 3, the contact area between the float and the probe is effectively controlled, and the friction is significantly reduced. This ensures that the float can move more smoothly when the liquid level changes, and reduces the phenomenon of the float getting stuck or moving inflexibly due to excessive friction.
[0041] The anti-stick protrusion 3 effectively prevents the float from sticking to the probe. Especially in environments with poor water quality, scale, particles and other impurities may form deposits on the contact surface. This design can greatly reduce the accumulation of deposits. Regardless of complex water quality environments such as sewage, seawater, and hard water, the float can maintain flexible movement, ensuring the accuracy of liquid level detection and the stability of equipment operation.
[0042] like Figures 1 to 10 As shown, in this embodiment, the anti-sticking protrusion 3 is provided on the outer wall of the probe rod 1. The probe rod 1 is provided with a first limiting block 11 and a second limiting block 12 spaced apart. The anti-sticking protrusion 3 is located between the first limiting block 11 and the second limiting block 12.
[0043] Preferably, the float 2 cooperates with the probe rod 1 through the movable through hole 21, and can slide freely along the axial direction on the probe rod 1. Preferably, the first limiting block 11 can be an assembly part (such as a connecting nut, flange, etc.) used to assemble the float switch on equipment (such as a humidifier, water purifier, water dispenser, coffee machine, etc.), or it can be a limiting component added to the probe rod 1. The second limiting block 12 can cooperate with the first limiting block 11 to limit the movement range of the float, ensuring that the movement of the float on the probe rod does not exceed the predetermined range, and preventing the float from falling or shifting. The anti-stick protrusion 3 is located between the first limiting block 11 and the second limiting block 12, which can ensure that the anti-stick protrusion plays an anti-stick role within the movement range of the float, and prevent the float and the probe rod from sticking due to scale or impurities.
[0044] like Figures 1 to 10 As shown, in this embodiment, the anti-sticking protrusion 3 extends along the length of the probe rod 1. One end of the anti-sticking protrusion 3 is close to or connected to the first limiting block 11, and the other end of the anti-sticking protrusion 3 is close to or connected to the second limiting block 12. That is, the length of the anti-sticking protrusion 3 is long enough to ensure that the inner wall of the movable through hole 21 and the outer wall of the probe rod 1 maintain a certain distance.
[0045] Specifically, the anti-stick protrusion 3 extends along the length of the probe rod 1, ensuring that the float 2 (installed on the probe rod through the movable through hole 21) always maintains a certain gap with the probe rod 1 during movement. Since one end of the anti-stick protrusion 3 is close to or connected to the first limiting block 11 and the other end is close to or connected to the second limiting block 12, it physically isolates the float 2 from the surface of the probe rod 1, thereby avoiding large-area contact between the float and the probe rod.
[0046] The extended design of the anti-stick protrusion 3 maintains a certain distance between the inner wall of the movable through hole 21 and the outer wall of the probe 1. When the float 2 is in motion, it only contacts the protrusion and does not contact most of the outer wall of the probe. This helps to ensure that the float can slide freely on the probe while avoiding excessive friction, adhesion or jamming.
[0047] Since the anti-stick protrusion 3 extends along the length of the probe rod 1, it ensures that the contact area between the float and the probe rod is minimized, thus effectively reducing friction. When the float slides along the axial direction of the probe rod 1, it will only contact the probe rod at the protrusion part, without creating too much contact area. This reduces friction and the deposition of scale and sediment, allowing for smooth movement and preventing the float from getting stuck due to excessive friction or the accumulation of scale and other substances. This improves the response speed and operational reliability of the float switch.
[0048] like Figures 1 to 10 As shown, the cross-sectional shape of the anti-stick protrusion 3 is polygonal, oblong, semi-circular, or slightly curved. By designing the cross-section of the anti-stick protrusion 3 as polygonal, oblong, semi-circular, or slightly curved, the contact between the float 2 and the probe 1 changes from a large-area surface contact to a line contact or a small-area surface contact. This design ensures that the float only contacts the probe in a specific area of the anti-stick protrusion when it moves, thereby significantly reducing the contact area between the float and the probe surface.
[0049] Furthermore, line contact and small-area surface contact can effectively reduce friction because the contact area is smaller, and the friction force is correspondingly reduced. The specific shape of the anti-stick protrusion (such as polygons, semicircles, etc.) can effectively guide the way the float contacts the probe, making the float 2 slide more smoothly and reducing the resistance and wear caused by excessive contact area.
[0050] The smaller contact area not only reduces friction, but also effectively reduces the accumulation of scale, deposits, and impurities at the contact point because the contact area between the float and the probe is smaller. This allows the float to slide freely, reducing the risk of jamming or failure caused by scale and impurities.
[0051] By designing the anti-stick protrusion 3 as a polygon, oval, semi-circular or inferior arc shape, the contact area is greatly reduced, and the friction between the float and the probe is significantly reduced. The reduction in friction makes the float 2 slide more smoothly on the probe 1, and can respond more flexibly to changes in liquid level, ensuring that the float switch reacts promptly when the liquid level rises or falls.
[0052] Due to the small contact area, the friction between the float and the probe is reduced. This not only helps to reduce wear, but also effectively avoids float jamming caused by excessive friction or deposit accumulation. The float can move more smoothly and stably on the probe, avoiding the jamming or failure problems caused by the large contact area between the float and the probe surface in traditional designs.
[0053] like Figures 1 to 10 As shown, in this embodiment, the cross-sectional shape of the probe rod 1 is circular, and the cross-sectional shape of the movable through hole 21 is circular; or, the cross-sectional shape of the probe rod 1 is polygonal, and the cross-sectional shape of the movable through hole 21 is polygonal.
[0054] Specifically, when the cross-sectional shape of the probe rod 1 is circular, the cross-sectional shape of the movable through hole 21 is also circular. In this way, the contact surface between the probe rod and the float is relatively smooth and there are no sharp angles or protrusions, which reduces the resistance of the float during the sliding process. The circular fit ensures that the float can slide evenly around the probe rod, avoiding jamming or uneven movement caused by shape mismatch.
[0055] In other embodiments, the cross-sectional shape of the probe 1 is polygonal, and the cross-sectional shape of the movable through hole 21 is also polygonal. This design allows for a tighter fit between the float and the probe, providing more stable support and preventing the float from affecting the measurement accuracy due to excessive floating during movement.
[0056] Whether the design is circular or polygonal, combined with the previously mentioned anti-stick protrusions (such as polygonal or oblong shapes), it can further reduce the excessive contact area or friction between the float and the probe, maintain the float's flexible sliding on the probe, and ensure that the float can respond smoothly to changes in liquid level.
[0057] Example 2:
[0058] The difference between this embodiment and Embodiment 1 is that,
[0059] like Figures 2 to 5 As shown, in this embodiment, there are multiple anti-sticking protrusions 3, which are spaced apart circumferentially along the outer wall of the probe rod 1.
[0060] Specifically, multiple anti-stick protrusions 3 are provided and are arranged circumferentially, that is, multiple anti-stick protrusions 3 are distributed circumferentially along the outer wall of the probe rod 1. This means that when the float 2 slides along the probe rod, it not only contacts a single protrusion, but also contacts multiple evenly distributed protrusions. Each protrusion bears a part of the contact pressure between the float and the probe rod, which can avoid excessive friction at a single point and cause jamming.
[0061] Furthermore, with multiple anti-stick protrusions 3 distributed around the outer wall of the probe, the float 2 contacts multiple protrusions when sliding, reducing excessive friction in a certain local area. This design of dispersing friction can effectively reduce the accumulation of scale, impurities or deposits in a certain part, thereby maintaining the smooth sliding of the float.
[0062] Furthermore, the multiple anti-stick protrusions 3 ensure that the float 2 receives more even support on the outer wall of the probe rod 1, avoiding the float jamming or tilting problems that may be caused by a single protrusion. The movement of the float is not restricted by a single point, ensuring that it is more stable and flexible throughout the sliding process.
[0063] Example 3:
[0064] The difference between this embodiment and Embodiment 1 is that,
[0065] like Figure 6 As shown, the number of anti-sticking protrusions 3 in this embodiment is multiple, and the multiple anti-sticking protrusions 3 are arranged axially along the outer wall of the probe rod 1.
[0066] Multiple anti-sticking protrusions are set on the outer surface of the probe rod. These protrusions are spaced apart in the axial direction to ensure that when the float 2 moves along the probe rod 1, the contact between the float and the probe rod is not concentrated in a certain area, but is distributed at multiple contact points. Each anti-sticking protrusion distributes the friction and pressure between the float and the probe rod in a uniform manner, thereby avoiding excessive friction in a certain part, which could lead to jamming or damage.
[0067] The anti-stick protrusions effectively guide the movement trajectory of the float, avoiding excessive contact or uneven friction between the float and the probe. When the float slides on the probe, each anti-stick protrusion only bears a certain contact area, thereby reducing the contact area and further reducing the friction between the float and the probe, allowing the float to respond more smoothly to changes in liquid level.
[0068] Furthermore, by setting multiple anti-sticking protrusions at intervals along the axial direction, the friction between the float and the probe can be effectively dispersed, avoiding friction accumulation in a certain local area. This design can also reduce the accumulation of scale, impurities and other deposits in a certain part, thereby preventing the float from getting stuck or failing and improving the working life of the float.
[0069] Preferably, the length between two adjacent anti-sticking protrusions 3 in the axial direction is less than the length of the movable through hole 21. This design ensures that the anti-sticking protrusions 3 can contact the movable through hole 21, so that the inner wall of the movable through hole 21 and the outer wall of the probe 1 are kept at a certain distance, thereby reducing the contact area between them.
[0070] Example 4:
[0071] The difference between this embodiment and Embodiment 1 is that,
[0072] like Figure 7 As shown, in this embodiment, there are multiple anti-stick protrusions 3, which are arranged in an array along the outer wall of the probe rod 1.
[0073] Specifically, multiple anti-stick protrusions are evenly distributed along the outer wall of the probe 1. This design ensures that the contact between the float 2 and the probe during movement is not limited to a local area, but is distributed across multiple contact points. Each anti-stick protrusion only bears a portion of the contact pressure, thereby enabling the float to achieve uniform friction distribution during sliding and reducing the problem of local friction accumulation.
[0074] This uniform distribution disperses friction across multiple areas, further reducing the frictional load at individual contact points, alleviating the resistance of the float's movement, and enabling it to respond more smoothly to changes in liquid level.
[0075] The array distribution design avoids large-area contact between the float and the probe, thereby reducing wear and friction. Multiple anti-stick protrusions effectively prevent localized or uneven wear caused by excessive contact surface, thus improving the durability of the float switch.
[0076] In summary, the anti-adhesion protrusions in Embodiments 3 and 4 are composed of multiple small blocks, unlike the long strip-shaped anti-adhesion protrusions in Embodiments 1 and 2. Preferably, the anti-adhesion protrusions in Embodiments 3 and 4 can be small rectangular blocks, triangular blocks, or semi-circular blocks, etc., so as to achieve small-area surface contact, line contact, or point contact between the float and the probe, and to maintain a certain distance between the inner wall of the movable through hole 21 and the outer wall of the probe 1, thereby reducing the contact area between them.
[0077] Example 5:
[0078] The difference between this embodiment and Embodiment 1 is that,
[0079] In this embodiment, the anti-stick protrusion 3 is provided on the inner wall of the movable through hole 21, and the length of the anti-stick protrusion 3 is similar to or equal to the length of the movable through hole 21.
[0080] Specifically, an anti-sticking protrusion 3 is provided on the inner wall of the movable through hole 21. The position of the anti-sticking protrusion ensures that during the sliding process of the float 2 inside the probe rod 1, the contact between the probe rod 1 and the movable through hole 21 is more dispersed and uniform, reducing the friction on the contact surface.
[0081] Furthermore, in this embodiment, the length of the anti-stick protrusion 3 is similar to or equal to the length of the movable through hole 21. This means that the anti-stick protrusion almost covers the entire inner wall length of the movable through hole, or at least covers most of the inner wall of the movable through hole. This design helps to ensure that when the float moves on the probe 1, the outer wall of the probe 1 can definitely contact the anti-stick protrusion, making the sliding process of the float smoother, and further reducing the jamming or uneven movement caused by excessive contact area or excessive friction.
[0082] Example 6:
[0083] The difference between this embodiment and embodiment 5 is that,
[0084] like Figures 8 to 10 As shown, the number of anti-stick protrusions 3 in this embodiment is multiple, and the multiple anti-stick protrusions 3 are arranged circumferentially along the inner wall of the movable through hole 21.
[0085] Specifically, the number of anti-stick protrusions 3 is set to multiple, and these protrusions are evenly spaced along the circumference. This design ensures that the contact surface between the float and the probe is effectively dispersed and will not be concentrated in a certain local area. Multiple anti-stick protrusions provide more contact points, enabling the float to maintain a uniform friction distribution when moving, avoiding excessive friction at a single contact point, thereby reducing the movement resistance of the float.
[0086] The circumferential distribution of multiple anti-stick protrusions allows the float to maintain more contact points during sliding, thereby improving the sliding stability of the float. The float will slide more smoothly on the probe, reducing the occurrence of float jamming or uneven sliding, and improving the reliability and response speed of the float switch.
[0087] Example 7:
[0088] The difference between this embodiment and embodiment 5 is that,
[0089] In this embodiment, there are multiple anti-stick protrusions 3, which are arranged axially along the inner wall of the movable through hole 21. This arrangement allows the float to contact multiple anti-stick protrusions when the probe slides up and down, avoiding an excessively large contact area between the float and the inner wall of the through hole, reducing the concentration of friction. By distributing multiple protrusions axially, the sliding trajectory of the float is more stable, reducing the resistance during sliding.
[0090] By setting multiple anti-sticking protrusions at intervals along the axial direction of the movable through hole, the contact between the float and the inner wall of the through hole will not be concentrated at a specific point or area. This can avoid excessive local friction or excessive wear. The multiple anti-sticking protrusions effectively disperse the contact force between the float and the inner wall of the through hole, reduce friction and wear, and thus improve the service life of the float.
[0091] Example 8:
[0092] The difference between this embodiment and embodiment 5 is that,
[0093] In this embodiment, there are multiple anti-stick protrusions 3, which are arranged in an array along the inner wall of the movable through hole 21.
[0094] Specifically, the anti-stick protrusions 3 are designed to be evenly distributed in an array along the inner wall of the movable through hole 21. This means that multiple anti-stick protrusions are distributed on the inner wall in a certain arrangement, which can provide multiple contact points and disperse the friction between the float and the inner wall. The array distribution ensures the stability of the float contacting the inner wall of the through hole when sliding up and down, and avoids excessive friction and wear caused by a single contact point.
[0095] Furthermore, the array of anti-stick protrusions ensures smoother sliding of the float on the probe, preventing jamming or instability caused by uneven contact points. Regardless of liquid level changes, the float responds stably and quickly, reducing sliding difficulties caused by excessive friction or impurity accumulation.
[0096] In summary, the anti-adhesion protrusions in Embodiments 7 and 8 are composed of multiple small blocks, unlike the long strip-shaped anti-adhesion protrusions in Embodiments 5 and 6. Preferably, the anti-adhesion protrusions in Embodiments 7 and 8 can be small rectangular blocks, triangular blocks, or semi-circular blocks, etc., so as to achieve small-area surface contact, line contact, or point contact between the float and the probe, and to maintain a certain distance between the inner wall of the movable through hole 21 and the outer wall of the probe 1, thereby reducing the contact area between them.
[0097] Example 9: The difference between this example and the examples above is that...
[0098] like Figure 11 As shown, in this embodiment, the anti-sticking protrusion 3 is provided on the outer wall of the probe rod 1 and the inner wall of the movable through hole 21. The appropriate design can be selected according to actual needs.
[0099] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.
Claims
1. A float switch characterised in that, The utility model provides a kind of probe rod (1) and float ball (2), the float ball (2) is equipped with movable through hole (21), the float ball (2) is set on the outside of probe rod (1) by movable through hole (21), and the float ball (2) can reciprocate along the axial direction of probe rod (1) by movable through hole (21), the installation cavity of being able to assemble magnetic induction action device is equipped in the probe rod (1), the magnet of being able to be inducted with magnetic induction action device is equipped in the float ball (2);The float ball (2) and probe rod (1) between are equipped with anti-sticking structure, the anti-sticking structure includes at least one anti-sticking protrusion (3), the anti-sticking protrusion (3) can make the inner wall of movable through hole (21) and the outer wall of probe rod (1) maintain certain distance, to reduce the contact area between the two.
2. The float switch according to claim 1, wherein The anti-sticking protrusion (3) is arranged on the outer wall of the probe rod (1) and / or the inner wall of the movable through hole (21).
3. The float switch of claim 1, wherein The anti-sticking protrusion (3) is arranged on the outer wall of the probe rod (1), and the probe rod (1) is provided with a first limiting block (11) and a second limiting block (12) arranged at intervals, and the anti-sticking protrusion (3) is located between the first limiting block (11) and the second limiting block (12).
4. The float switch according to claim 3, wherein The anti-sticking protrusion (3) extends along the length direction of the probe rod (1), one end of the anti-sticking protrusion (3) is adjacent to or connected to the first limiting block (11), and the other end of the anti-sticking protrusion (3) is adjacent to or connected to the second limiting block (12).
5. The float switch of claim 1, wherein, The anti-sticking protrusion (3) is arranged on the inner wall of the movable through hole (21), and the length dimension of the anti-sticking protrusion (3) is adjacent to or equal to the length dimension of the movable through hole (21).
6. A float switch according to any one of claims 2 to 5, characterised in that, The number of the anti-sticking protrusions (3) is multiple, and the multiple anti-sticking protrusions (3) are arranged circumferentially at intervals.
7. The float switch according to any one of claims 1 to 3, characterized in that The number of the anti-sticking protrusions (3) is multiple, and the multiple anti-sticking protrusions (3) are arranged axially at intervals.
8. The float switch according to any one of claims 1 to 3, characterized in that The number of the anti-sticking protrusions (3) is multiple, and the multiple anti-sticking protrusions (3) are arranged in an array.
9. The float switch according to any one of claims 1 to 5, characterized in that The cross-sectional shape of the anti-sticking protrusion (3) is polygonal, oblong, semicircular or arcuate.
10. The float switch according to any one of claims 1 to 5, characterized in that The cross-sectional shape of the probe rod (1) is circular, and the cross-sectional shape of the movable through hole (21) is also circular; or the cross-sectional shape of the probe rod (1) is polygonal, and the cross-sectional shape of the movable through hole (21) is also polygonal.