A contact switch and cleaning gun

Abstract

The utility model discloses a contact switch, including circuit substrate, first fixed contact and first contact spring, be equipped with the power module of control machine opening and closing on circuit substrate, first fixed contact and first contact spring with power module electric connection, make first contact spring and first fixed contact can pass through power module control machine opening and closing, because first contact spring and first fixed contact simple structure personally, have not set up the shell body and wrapped first contact spring and first fixed contact, make first contact spring and first fixed contact even contaminate various dust or moisture, after machine work is completed, can very easily wipe dry and blow dry dust or moisture on first contact spring and first fixed contact, have the advantage that easy to clean, prolong the working life of machine. The utility model discloses still a kind of including the cleaning gun of above-mentioned contact switch.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, and in particular to a contact switch and a cleaning gun. Background Technology

[0002] In some machines, prolonged use inevitably leads to the accumulation of various foreign objects. These foreign objects may enter the machine's interior, specifically the mounting cavity of the circuit board 1. If the machine's waterproof and dustproof rating does not reach IP44 or higher, such as... Figure 7 Foreign objects can easily enter the start switch 4 through gaps. Since the control contacts are enclosed by the start switch housing, these foreign objects are difficult to remove, potentially causing poor contact, oxidation of the contacts, or short circuits. To address this issue, commercially available machines often employ various sealing structures to enhance their protection level. However, this approach not only complicates the internal structure due to the need for multiple sealing designs but also increases costs by adding various sealing components.

[0003] It is clear that existing technologies still need improvement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a contact switch and a cleaning gun, which have the advantages of simple structure and easy cleaning, so as to overcome the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A contact switch includes a circuit board and a first start button. The first start button includes a first fixed contact. A power module is provided on the circuit board and is spot-welded to the circuit board. The fixed contact is welded to the other side of the circuit board corresponding to the power module and is electrically connected to the power module through the circuit board. A contact spring is sleeved on the fixed contact and is sleeved on the fixed contact. The lower end of the contact spring is electrically connected to the power module through the circuit board. A pagoda-shaped first spring top cover with a gradually decreasing diameter is fixed to the upper end of the contact spring.

[0007] Furthermore, the circuit board is provided with a second start button, and the circuit board is provided with a control module. The control module is soldered onto the circuit board. The second start button includes a second fixed contact. The second fixed contact is soldered onto the other side of the circuit board corresponding to the control module. The second fixed contact is electrically connected to the control module through the circuit board. A second contact spring is sleeved on the second fixed contact. The lower end of the second contact spring is electrically connected to the control module through the circuit board. A pagoda-shaped second spring top cover with a gradually decreasing diameter is fixed to the upper end of the second contact spring.

[0008] A cleaning gun includes a gun body, a water pipe inside the gun body, a water inlet connector at one end of the water pipe and a gun head at the other end, a trigger hinged to the gun body, the trigger including a free end and a linkage end, and also including the aforementioned contact switch, the free end touching or moving away from the contact switch as the trigger is pulled and released, thereby controlling the cleaning gun to start or stop.

[0009] The gun body is composed of a left gun cover and a right gun cover connected together. The inner wall of the left gun cover is uniformly and vertically arranged with a first rib and a second rib. The inner wall of the right gun cover is correspondingly arranged with a third rib and a fourth rib. The first rib, the third rib, the second rib and the fourth rib are combined in the inner cavity of the gun body to form an air chamber. The contact switch is located inside the air chamber. The air chamber is provided with an air inlet on the gun body.

[0010] The lower part of the air chamber is provided with a set of vertically arranged protrusions, which form positioning slots for fixing the contact switch.

[0011] The above technical solution has the following beneficial effects:

[0012] The contact switch of this utility model includes a circuit board, a first fixed contact, and a first spring top cover. Since the first contact spring and the first fixed contact themselves have simple structures and do not have an outer shell to enclose the first contact spring and the first fixed contact, even if water or dust enters the first contact spring and the first fixed contact, the dust or moisture on the first contact spring and the first fixed contact can be easily wiped and blown dry after the machine has finished working. It has the advantages of being easy to clean and not afraid of water ingress, thus extending the working life of the machine. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0015] Figure 1 This is a schematic diagram of the contact switch of this utility model. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the structure in a preferred embodiment.

[0017] Figure 3 This is a schematic diagram of a cleaning gun that uses a contact switch.

[0018] Figure 4 A half-sectional view of the left gun shroud for cleaning the gun.

[0019] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0020] Figure 6 A half-sectional view of the right gun shroud for cleaning the gun.

[0021] Figure 7 This is a schematic diagram of the structure of a start switch in the prior art.

[0022] In the figure: circuit board 1, first fixed contact 11, first contact spring 12, first spring coil 13, second fixed contact 111, second contact spring 112, second spring coil 113, gun body 2, trigger 21, free end 211, linkage end 212, first rib 22, third rib 221, second rib 23, third rib 231, air chamber 3, air inlet 32, air outlet 321, positioning slot 33, ventilation slot 34, rubber ring 35, water pipe 6. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] See Figure 1As shown, this utility model discloses a contact switch, including a circuit board 1 and a first start button. The first start button includes a first fixed contact 11. A power module is provided on the circuit board 1 and is spot-welded to the circuit board 1. The fixed contact 11 is welded to the other side of the circuit board 1 corresponding to the power module and is electrically connected to the power module through the circuit board 1. A contact spring 12 is sleeved on the fixed contact 11 and its lower end is electrically connected to the power module through the circuit board 1. A pagoda-shaped first spring top cover 13 with a gradually decreasing diameter is fixed to the upper end of the contact spring 12. When the user needs to control the machine to start, they can press the contact switch to move the first spring top cover and the first contact spring downwards until the first spring top cover touches the first contact switch, keeping the first contact switch and the first spring top cover connected, thus connecting the power circuit and starting the machine. Conversely, when the user needs to shut down the machine, pressing the contact switch again resets the first spring top cover and the first contact spring, moving the first spring top cover away from the first contact switch, disconnecting the power circuit, and thus shutting down the machine. Furthermore, because the first contact spring 12 and the first fixed contact 11 have a simple structure and do not have an outer casing to enclose them, even if they become contaminated with dust or moisture, they can be easily wiped or blown dry after the machine has finished operating. This makes them waterproof, easy to clean, and extends the service life of the contact switch.

[0025] See Figure 2 In a preferred embodiment, the circuit board 1 is provided with a second start button, and the circuit board is provided with a control module. The control module is soldered onto the circuit board. The second start button includes a second fixed contact 111. The second fixed contact 111 is soldered onto the other side of the circuit board 1 corresponding to the control module. The second fixed contact 111 is electrically connected to the control module through the circuit board 1. A second contact spring 112 is sleeved on the second fixed contact 111. The lower end of the second contact spring 112 is electrically connected to the control module through the circuit board 1. A pagoda-shaped second spring top cover 113 with a gradually decreasing diameter is fixed to the upper end of the second contact spring 112.

[0026] Specifically, the circuit board 1 is equipped with both a first start button and a second start button. The first button controls the machine's start or stop via a power module soldered to the circuit board, while the second button controls the machine's actions after startup via a control module soldered to the circuit board 1. When the user needs the machine to perform production activities, pressing the first button connects the first spring top cover 13 and the first contact spring 12 to the first fixed contact 11, activating the power circuit and starting the machine. Pressing the second button then connects the second spring top cover 113 and the second contact spring 112 to the second fixed contact 111, activating the control circuit, allowing the user to control the machine to perform various production activities.

[0027] See Figure 3-6 The aforementioned contact switch can be applied to a cleaning gun. The cleaning gun includes a gun body 2 and a contact switch. The gun body 2 is composed of a left gun cover and a right gun cover connected together. A water pipe 6 is provided inside the gun body 2. The water pipe 6 passes through the gun body 2 and is fixedly connected to the gun body 2. One end of the water pipe 6 is provided with a water inlet connector, and the other end is provided with a gun head. A trigger 21 is hinged to the gun body 2. The trigger 21 includes a free end 211 and a linkage end 212 that is hinged to the gun body 2. The free end 211 touches or moves away from the contact switch as the trigger 21 is pulled and released, thereby controlling the cleaning gun to start or stop, so that the cleaning gun can realize the cleaning function.

[0028] The inner wall of the left gun cover is vertically and evenly provided with a first rib 22 and a second rib 23, with the side of the first rib 22 abutting against the side of the second rib 23. The inner wall of the right gun cover is provided with a third rib 221 and a fourth rib 231, with the side of the third rib 221 abutting against the side of the fourth rib. The first rib 22, the third rib 231, the second rib 23, and the fourth rib 231 combine in the inner cavity of the gun body 2 to form an air chamber 3, so that the contact switch is placed inside the air chamber 3, providing a certain degree of protection for the contact switch and reducing the probability of the contact switch getting wet. The air chamber 3 has a channel that runs through the interior of the air chamber 3. One end of the water pipe 6 is connected to the water outlet device outside, and the other end enters the interior of the gun body 2, passes through the channel in the air chamber 3, and is fixed inside the cleaning gun. The outlet of the water pipe 6 is fixed at the head of the cleaning gun. The channel size matches the water pipe 6. The channel positions the water pipe 6 inside the gun body 2, making the cleaning gun easier to use.

[0029] The air chamber 3 has an air inlet 32 ​​on the gun body 2. After the cleaning gun finishes working, the user can insert the air gun into the air chamber 3 through the air inlet 32, causing the air gun to spray airflow to disperse the moisture inside the air chamber 3, turning the moisture into fine water droplets that float away from the air inlet 32. The lower part of the air chamber 3 has a set of vertically arranged protrusions, which form positioning slots 33 for fixing the contact switch. The contact switch is fixed in the positioning slots 33, making the internal structure of the cleaning gun more stable. The circuit board 1 has a ventilation slot 34 at the end away from the first fixed contact 11 and the second fixed contact 111, allowing the airflow from the air gun to enter through the ventilation holes and contact the first fixed contact 11 and the first contact spring 12 on the circuit board 1, dispersing the moisture adhering to the first fixed contact 11 and the first contact spring 12, keeping the contact switch dry and extending its service life.

[0030] The gun body 2 is also provided with an air outlet 321 corresponding to the air inlet 32. The air inlet 32 ​​and the air outlet 321 are connected to the inner cavity of the ventilation chamber 3, so that the fine water droplets blown by the air gun inside the ventilation chamber 3 can float out from the air outlet 321, which is more conducive to keeping the inside of the ventilation chamber 3 dry.

[0031] Rubber rings 35 are provided at both ends of the channel in the air chamber 3 to prevent water from entering the air chamber 3 through the water pipe 6 when the cleaning gun is working, so that the contact switches inside the air chamber 3 will not get wet. In addition, the rubber rings 35 at the channel openings reduce the friction between the channel openings and the water pipe 6, making the outer wall of the water pipe 6 less prone to breakage.

[0032] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A contact switch, characterized in that, The circuit board (1) and the first start button are included. The first start button includes a first fixed contact (11). A power module is provided on the circuit board. The power module is spot-welded to the circuit board. The first fixed contact (11) is welded to the other side of the circuit board (1) corresponding to the power module. The first fixed contact (11) is electrically connected to the power module through the circuit board (1). A first contact spring (12) is sleeved on the first fixed contact (11). The first contact spring (12) is sleeved on the first fixed contact (11). The lower end of the first contact spring (12) is electrically connected to the power module through the circuit board (1). A pagoda-shaped first spring top cover (13) with a gradually decreasing diameter is fixed to the upper end of the first contact spring (12).

2. The contact switch according to claim 1, characterized in that: The circuit board (1) is provided with a second start button. The circuit board (1) is provided with a control module. The control module is soldered on the circuit board (1). The second start button includes a second fixed contact (111). The second fixed contact (111) is soldered on the other side of the circuit board (1) corresponding to the control module. The second fixed contact (111) is electrically connected to the control module through the circuit board (1). A second contact spring (112) is sleeved on the second fixed contact (111). The second contact spring (112) is sleeved on the second fixed contact (111). The lower end of the second contact spring (112) is electrically connected to the control module through the circuit board (1). A pagoda-shaped second spring top cover (113) with a gradually decreasing diameter is fixed on the upper end of the second contact spring (112).

3. A cleaning gun, comprising a gun body (2), wherein a water pipe is provided inside the gun body, one end of the water pipe is provided with a water inlet connector, and the other end is connected to a gun head, and a trigger (21) is hinged to the gun body, the trigger comprising a free end (211) and a linkage end, characterized in that: It also includes a contact switch as described in claim 1 or 2, wherein the free end touches or moves away from the contact switch as the trigger is pulled and released, thereby controlling the start or stop of the cleaning gun.

4. The cleaning gun according to claim 3, characterized in that: The gun body (2) is formed by connecting a left gun cover and a right gun cover. The inner wall of the left gun cover is uniformly and vertically provided with a first rib (22) and a second rib (23). The inner wall of the right gun cover is correspondingly provided with a third rib (221) and a fourth rib (231). The first rib, the third rib, the second rib and the fourth rib are combined in the inner cavity of the gun body to form an air chamber (3). The contact switch is placed inside the air chamber. The air chamber is provided with an air inlet (32) on the gun body.

5. The cleaning gun according to claim 4, characterized in that: The lower part of the air chamber is provided with a set of vertically arranged protrusions, which form a positioning slot (33) for fixing the contact switch.

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