Alarm with dry reed protection

Abstract

The utility model discloses a kind of alarm with dry Reed pipe protection structure, belong to oil cup liquid level monitoring equipment technical field, including PCB board, dry Reed pipe and magnetic buoy, dry Reed pipe is fixedly installed in PCB board, further including installation sleeve and installation cover, installation cover is fixed on the one end of installation sleeve away from dry Reed pipe, it is also fixed on external oil cup simultaneously, with installation sleeve is fixed in external oil cup, PCB board is embedded in installation sleeve, the inner wall of installation sleeve is attached with PCB board, magnetic buoy is sleeved on installation sleeve.The utility model passes through the installation sleeve of inner wall attachment PCB board and overall wrapping dry Reed pipe and circuit board, installation sleeve insulates external extrusion stress in the process of transfer, avoid glass material dry Reed pipe to be pressed and broken;While no assembly gap can limit PCB board, prevent plate body to deviate and pull solder joint, reduce false soldering and soldering fault.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil cup liquid level monitoring equipment technical field, more specifically relates to a kind of alarm with reed tube protection structure. BACKGROUND

[0002] The oil cup in prior art will be provided with a liquid level alarm, to realize the monitoring of the liquid level in the oil cup, the existing liquid level alarm is mainly composed of circuit board and reed tube, since the main material of reed tube is glass, in the process of transporting and circulating oil cup semi-finished product, reed tube is easily broken by stress and extrusion, causing product efficacy failure.

[0003] Therefore, the utility model discloses a kind of liquid level alarm plastic power steering oil tank with the utility model patent with the announcement number CN218624793U, which comprises a circuit board and a reed tube housed in an electric protection tube, and the electric protection tube protects the reed tube. However, the electric protection tube of the oil tank is a variable-diameter cylindrical tube with a thick bottom and a thin top, which can cause a relatively large gap between the electric protection tube and the circuit board. During assembly, the circuit board can easily shift within the electric protection tube, causing the pins to pull the circuit board solder joints and leading to virtual soldering and soldering failure. UTILITY MODEL CONTENT

[0004] To overcome the deficiencies of the prior art, the utility model provides an alarm with a reed tube protection structure. The limit PCB board and reed tube are installed in a fitted manner, and the installation cover is used to achieve overall fixation and protection. This design avoids damage to the reed tube caused by transportation and extrusion and eliminates the soldering failure caused by the shift of the circuit board.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an alarm with a reed tube protection structure, comprising a PCB board, a reed tube, and a magnetic float. The reed tube is fixedly installed in the PCB board. The utility model further comprises an installation sleeve and an installation cover. The installation cover is fixed to one end of the installation sleeve away from the reed tube and is also fixed to an external oil cup. The installation sleeve is fixed in the external oil cup. The PCB board is embedded in the installation sleeve. The inner wall of the installation sleeve is fitted with the PCB board. The magnetic float is sleeved on the installation sleeve.

[0006] As a further improvement of the utility model, an installation cavity is formed in the installation sleeve along the length direction of the installation sleeve. The cross-sectional shape of the installation cavity is in the shape of a "convex" character. The installation cavity is adapted to the PCB board and forms a tube cavity for accommodating the reed tube.

[0007] As a further improvement of the utility model, a wire protection rod is provided on one side of the installation cover. A plug is provided on one end of the wire protection rod away from the installation cover. The wire is connected to the PCB board after being led out from the plug and passing through the wire protection rod.

[0008] As a further improvement of the utility model, the mounting cover is provided with a positioning block on the side facing the mounting sleeve, and a positioning groove is formed in the positioning block and adapted to the PCB and for inserting the PCB.

[0009] As a further improvement of the utility model, a positioning plate is arranged at the center of the positioning groove, and a positioning notch is formed in the end of the PCB and adapted to the positioning plate, so that the positioning notch is sleeved on the positioning plate when the PCB is inserted into the positioning groove.

[0010] As a further improvement of the utility model, a guide slope is arranged on the inner wall of the end of the positioning groove facing away from the mounting cover and used for guiding the end of the PCB.

[0011] The utility model has the beneficial effects that the utility model is provided with the mounting sleeve with the inner wall completely adhering to the PCB, and the mounting sleeve is used for integrally wrapping and protecting the PCB and the reed switch with the glass material. When the oil cup is transported and circulated, the mounting sleeve can isolate external extrusion and impact stress, effectively prevent the reed switch from being broken due to pressure, and ensure the stability of the liquid level alarm function. At the same time, the mounting sleeve has no extra assembly gap, the PCB will not be shaken and deviated inside, the reed switch pin is prevented from pulling the PCB welding point, the false welding and the welding failure are greatly reduced, the assembly stability and the protection effect are significantly improved compared with the existing variable-diameter cylindrical protection tube. The convex-shaped mounting cavity is used for partitioning and accommodating the PCB and the reed switch, the positioning block, the positioning groove and the positioning notch are matched to realize the accurate alignment of the PCB, and the guide slope reduces the assembly difficulty. The wire protection rod is matched with the plug to regularly arrange the wires, the wires are prevented from being bent and pulled to the circuit board, the overall assembly is convenient and firm in position, and the product assembly efficiency and the long-term use reliability are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional view of an oil cup of an alarm with a reed switch protection structure according to the utility model; Figure 2 It is a structural view of an alarm with a reed switch protection structure according to the utility model; Figure 3 It is a structural view of the mounting sleeve; Figure 4 It is a combined structural view of the PCB and the mounting cover. DETAILED DESCRIPTION

[0013] The utility model will be further described in combination with the embodiments shown in the drawings.

[0014] Referring to Figures 1 to 2As shown, the alarm with the dry reed tube protection structure comprises a PCB board 1, a dry reed tube 2 and a magnetic float 5, the dry reed tube 2 is fixedly installed in the PCB board 1, further comprising a mounting sleeve 3 and a mounting cover 4, the mounting cover 4 is fixed on the end of the mounting sleeve 3 away from the dry reed tube 2, and is also fixed on an external oil cup, so that the mounting sleeve 3 is fixed in the external oil cup, the PCB board 1 is embedded in the mounting sleeve 3, the inner wall of the mounting sleeve 3 is attached to the PCB board 1, and the magnetic float 5 is sleeved on the mounting sleeve 3. During assembly, the PCB board 1 is embedded in the mounting sleeve 3, the inner wall of the mounting sleeve 3 is completely attached to the PCB board 1, and there is no gap, the mounting sleeve 3 can isolate external extrusion stress during the transportation of the oil cup, the glass dry reed tube 2 will not be directly impacted and broken by external force; the PCB board 1 is tightly limited and cannot be shaken and deviated, the pins of the dry reed tube 2 cannot continuously pull the welding points, so that the virtual welding and welding failure are completely eliminated, the magnetic float 5 floats up and down along the outer wall of the mounting sleeve 3, and the oil level sensing alarm is realized by the internal dry reed tube 2.

[0015] Further, referring to Figure 3 As shown, the mounting sleeve 3 is provided with a mounting cavity 31 extending along the length direction of the mounting sleeve 3, the cross section of the mounting cavity 31 is in the shape of a "convex" character, forming a plate cavity matched with the PCB board 1 and a tube cavity accommodating the dry reed tube 2. The convex mounting cavity 31 is partitioned and limited, the PCB board 1 and the dry reed tube 2 are respectively independently accommodated, the alignment is simple during assembly, the transverse and longitudinal movement of the plate body is further limited, the anti-deviation effect is strengthened, and the protection stability of the dry reed tube 2 is assisted to be improved.

[0016] Further, referring to Figure 2 As shown, one side of the mounting cover 4 is provided with a wire protection rod 41, one end of the wire protection rod 41 away from the mounting cover 4 is provided with a plug 42, and the wire is connected with the PCB board 1 after being led out from the plug 42 and passing through the wire protection rod 41. The wire is uniformly accommodated in the wire protection rod 41, so that the wire is prevented from being disorderly bent and pulled to pull the wiring end of the PCB board 1, the plug 42 realizes quick plug-in and plug-out wiring, and the whole machine assembly process is simplified.

[0017] Further, referring to Figure 4 As shown, one side of the mounting cover 4 facing the mounting sleeve 3 is provided with a positioning block 43, the positioning block 43 is provided with a positioning groove 431 matched with the PCB board 1 and allowing the PCB board 1 to be inserted. The end of the PCB board 1 is inserted into the positioning groove 431 to realize end limiting, is attached to the inner wall of the mounting sleeve 3 to form a double fixing structure, and completely eliminates the front and back and left and right displacement space of the plate body.

[0018] Further, referring to Figure 4As shown, the center of the positioning groove 431 is provided with a positioning plate 432, and the end of the PCB 1 is provided with a positioning notch 11, which is matched with the positioning plate 432, so that the positioning notch 11 is sleeved on the positioning plate 432 when the PCB 1 is inserted into the positioning groove 431. The positioning plate 432 and the positioning notch 11 are clamped to realize circumferential limiting, prevent the PCB 1 from rotating and deflecting, ensure the accurate position of the reed switch 2, and ensure the stable sensitivity of the magnetic float 5.

[0019] Further, referring to Figure 4 As shown, the inner wall of one end of the positioning groove 431 away from the mounting cover 4 is provided with a guide slope for guiding the end of the PCB 1. The guide slope plays a guiding role, and the PCB 1 can be smoothly pushed into the positioning groove 431 without accurate alignment during assembly, thereby reducing the assembly operation difficulty and improving the production and assembly efficiency.

[0020] In summary, the mounting sleeve 3 with the inner wall adhered to the PCB 1 is used to wrap the reed switch 2 and the circuit board, the mounting cover 4 with the positioning block 43, the positioning groove 431 and the positioning plate 432 is used to realize double limiting, which not only solves the problem of reed switch 2 rupture caused by oil cup transfer and extrusion, but also eliminates the virtual welding and welding defects caused by the gap offset between the PCB 1 and the mounting sleeve 3. Meanwhile, the convex-shaped mounting cavity 31, the positioning groove 431 with the guide slope, the wire protection rod 41 and the plug 42 are matched to simplify the assembly and improve the positioning accuracy. The magnetic float 5 is sleeved outside the mounting sleeve 3 to complete the liquid level sensing, and the overall protection is reliable and convenient to assemble, which effectively improves the service life and yield of the oil cup liquid level alarm.

[0021] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the scope of the present application is within the protection scope of the present application. It should be noted that for ordinary skilled in the art, some improvements and decorations without departing from the principles of the present application are also considered as the protection scope of the present application.

Claims

1. An alarm with a reed switch protection structure, comprising a PCB board (1), a reed switch (2), and a magnetic float (5), wherein the reed switch (2) is fixedly installed inside the PCB board (1), characterized in that: It also includes an installation sleeve (3) and an installation cover (4). The installation cover (4) is fixed on the end of the installation sleeve (3) facing away from the reed switch (2) and is also fixed on the external oil cup so that the installation sleeve (3) is fixed inside the external oil cup. The PCB board (1) is embedded in the installation sleeve (3). The inner wall of the installation sleeve (3) is in contact with the PCB board (1). The magnetic float (5) is sleeved on the installation sleeve (3).

2. The alarm with reed switch protection structure according to claim 1, characterized in that: The mounting sleeve (3) has a mounting cavity (31) extending along the length of the mounting sleeve (3). The cross-sectional shape of the mounting cavity (31) is "convex", forming a board cavity that is compatible with the PCB board (1) and a tube cavity that accommodates the reed switch (2).

3. The alarm with a reed switch protection structure according to claim 2, characterized in that: The mounting cover (4) has a wire guard rod (41) on one side. The end of the wire guard rod (41) facing away from the mounting cover (4) has a plug (42). The wire is led out from the plug (42), passes through the wire guard rod (41), and is connected to the PCB board (1).

4. The alarm with a reed switch protection structure according to claim 3, characterized in that: The mounting cover (4) has a positioning block (43) on the side facing the mounting sleeve (3). The positioning block (43) has a positioning groove (431) that is adapted to the PCB board (1) and allows the PCB board (1) to be inserted.

5. The alarm with a reed switch protection structure according to claim 4, characterized in that: A positioning plate (432) is provided at the center of the positioning groove (431), and a positioning notch (11) is provided at the end of the PCB board (1). The positioning notch (11) is adapted to the positioning plate (432) so that when the PCB board (1) is inserted into the positioning groove (431), the positioning notch (11) fits onto the positioning plate (432).

6. The alarm with a reed switch protection structure according to claim 5, characterized in that: The positioning groove (431) has a guide slope on the inner wall of one end facing away from the mounting cover (4) for guiding the end of the PCB board (1).

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