Mechanical instrument integrated with signal output function

Abstract

The utility model relates to the technical field of instruments, and discloses a mechanical instrument integrated with a signal output function, which comprises an instrument main body, a pointer, a circuit board and a signal output piece. A dial is arranged on the instrument body, and the pointer is rotationally arranged on the instrument body and provided with a first sensing component. The circuit board is provided with second induction parts which are in one-to-one correspondence with a plurality of scales on the dial, and when the pointer rotates relative to the instrument main body, the first induction part can be inducted with the plurality of second induction parts one by one. And the signal output part is in communication connection with the circuit board and is configured to output a signal generated by the circuit board when the first induction part and the second induction part induce, and the output induction signal is the scale value indicated by the corresponding pointer. According to the mechanical instrument, the scale value indicated by the pointer can be directly checked, and the scale value can be output to carriers such as display equipment in a signal form for a user to check, so that the function of the mechanical instrument is expanded, and the practicability and the use flexibility of the mechanical instrument can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments, in particular to a mechanical instrument integrating a signal output function. Background Art

[0002] A mechanical instrument, also known as a "direct-reading instrument", can directly read the measured value. For example, a mechanical instrument for measuring liquid level usually has a pointer rotating to indicate the scale on the dial, and the scale indicated when the pointer stops is the measured liquid level value.

[0003] For the above-mentioned mechanical instrument, since the measured value is reflected by the scale on the dial, when the user checks the liquid level, he must go to the installation position of the mechanical instrument to see the specific liquid level value, resulting in limited application and poor flexibility of use of the mechanical instrument. For example, for the fuel tank of a vehicle, the driver needs to know the liquid level of the fuel tank at any time to ensure driving safety, and the existing mechanical instruments cannot be directly applied to the fuel tank.

[0004] Therefore, there is an urgent need for a mechanical instrument integrating a signal output function to solve the above problems. Summary of the Utility Model

[0005] Based on the above problems, the purpose of the utility model is to provide a mechanical instrument integrating a signal output function, which can expand the functions of the mechanical instrument and improve the practicality and flexibility of use of the mechanical instrument.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A mechanical instrument integrating a signal output function, comprising:

[0008] An instrument main body, on which a dial is provided;

[0009] A pointer, rotatably arranged on the instrument main body, and a first induction component is arranged on the pointer;

[0010] A circuit board, arranged on the instrument main body, and a second induction component corresponding to a plurality of scales on the dial is arranged on the circuit board. When the pointer rotates relative to the instrument main body, the first induction component can sequentially sense with a plurality of the second induction components;

[0011] A signal output component, communicatively connected to the circuit board, and the signal output component is configured to be able to output the signal generated by the circuit board when the first induction component senses with the second induction component.

[0012] As an alternative solution for the mechanical instrument with an integrated signal output function of the present utility model, the scale has a first threshold scale, and a third sensing component corresponding to the first threshold scale is provided on the circuit board. When the pointer rotates to the point where the first sensing component senses the third sensing component, the signal output component can output a first alarm signal;

[0013] And / or, the scale has a second threshold scale, and a fourth sensing component corresponding to the second threshold scale is provided on the circuit board. When the pointer rotates to the point where the first sensing component senses the fourth sensing component, the signal output component can output a second alarm signal.

[0014] As an alternative solution for the mechanical instrument with an integrated signal output function of the present utility model, the first sensing component includes a magnetic part, an induction circuit is provided on the circuit board, the second sensing component includes a magnetic sensor disposed in the induction circuit, and the magnetic sensor can conduct the induction circuit under the magnetic field action of the magnetic part.

[0015] As an alternative solution for the mechanical instrument with an integrated signal output function of the present utility model, the signal output component includes a signal line. One end of the signal line is communicatively connected to the circuit board, and the other end of the signal line is provided with a connector configured to be connected to a display device, and the display device can display the signal output by the signal line.

[0016] As an alternative solution for the mechanical instrument with an integrated signal output function of the present utility model, the mechanical instrument with the integrated signal output function further includes:

[0017] A guiding member, one end of which is connected to the instrument body, and the other end can be positioned in a liquid storage container for holding liquid;

[0018] A floating member movably disposed on the guiding member, and the floating member can move relative to the guiding member under the buoyancy of the liquid in the liquid storage container;

[0019] A transmission member, one end of which is connected to the pointer, and the other end is in transmission cooperation with the floating member. When the floating member moves relative to the guiding member, it can drive the transmission member to drive the pointer to rotate.

[0020] As an alternative solution for the mechanical instrument with an integrated signal output function of the present utility model, a through hole is provided on the floating member, the transmission member passes through the through hole, a first mating portion is provided on the inner wall of the through hole, and a second mating portion is provided on the outer peripheral surface of the transmission member. When the floating member moves relative to the guiding member, it can drive the transmission member to rotate under the interaction of the first mating portion and the second mating portion;

[0021] And / or, a guiding hole is provided on the floating member, and the guiding member passes through the guiding hole and is in sliding fit with the guiding hole.

[0022] As an alternative solution of the mechanical instrument with an integrated signal output function of the present invention, a shaft hole is provided on the instrument body, a rotating portion is provided at one end of the transmission member, and the rotating portion passes through the shaft hole and is in rotational fit with the shaft hole.

[0023] As an alternative solution of the mechanical instrument with an integrated signal output function of the present invention, a limiting member is provided at one end of the guiding member away from the instrument body, the limiting member can limit the moving stroke of the floating member, and one end of the transmission member away from the pointer is rotatably connected to the limiting member.

[0024] As an alternative solution of the mechanical instrument with an integrated signal output function of the present invention, the mechanical instrument with an integrated signal output function further includes a protective cover. A receiving groove is recessed on the instrument body, the circuit board and the scale disk are both located in the receiving groove, the protective cover is detachably connected to the instrument body and can cover the notch of the receiving groove, and the area of the protective cover opposite to the scale disk is a transparent structure.

[0025] As an alternative solution of the mechanical instrument with an integrated signal output function of the present invention, the mechanical instrument with an integrated signal output function further includes a fixing ring. The fixing ring is located in the receiving groove, and the protective cover can press the fixing ring against the scale disk.

[0026] The beneficial effects of the present invention are as follows:

[0027] For the mechanical instrument with an integrated signal output function provided by the present invention, by providing a first sensing component on the pointer and a second sensing component corresponding to a plurality of scales on the scale disk on the circuit board, when the pointer rotates to indicate a certain scale on the scale disk, the first sensing component on the pointer can simultaneously sense the second sensing component corresponding to this scale on the circuit board, so that the circuit board generates a sensing signal corresponding to the scale indicated by the pointer, and the sensing signal is output through the signal output component. The output sensing signal corresponds to the scale value indicated by the pointer. For example, when this mechanical instrument is applied to the fuel tank of a vehicle to measure the liquid level in the fuel tank, the signal output component can be communicatively connected to the display device on the vehicle console, and the display device is used to display the scale value currently pointed by the pointer, that is, the liquid level of the fuel tank. In this way, the user can know the liquid level of the fuel tank measured by the mechanical instrument on the console. That is to say, for this mechanical instrument with an integrated signal output function, in addition to directly viewing the scale value indicated by the pointer, the scale value can also be output in the form of a signal to a carrier such as a display device for the user to view, expanding the function of the mechanical instrument and effectively improving the practicability and use flexibility of the mechanical instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0029] Figure 1 is a schematic structural diagram of a mechanical instrument provided by the specific embodiment of the present utility model;

[0030] Figure 2 is a top view of the mechanical instrument provided by the specific embodiment of the present utility model;

[0031] Figure 3 is a schematic diagram of the circuit board of the mechanical instrument provided by the specific embodiment of the present utility model;

[0032] Figure 4 is a partial cross-sectional view of the mechanical instrument provided by the specific embodiment of the present utility model;

[0033] Figure 5 is Figure 4 a partial view of

[0034] In the figure:

[0035] 1 - instrument main body; 2 - scale dial; 3 - pointer; 4 - circuit board; 5 - signal output component; 6 - guiding component; 7 - floating component; 8 - transmission component; 9 - protective cover; 10 - fixing ring;

[0036] 11 - accommodating groove; 12 - connecting part; 13 - operating part; 14 - second sealing ring;

[0037] 21 - scale;

[0038] 31 - rotating shaft; 32 - locking pin; 33 - limiting snap ring;

[0039] 41 - second induction component; 42 - third induction component; 43 - fourth induction component;

[0040] 51 - signal line; 52 - connector;

[0041] 61 - limiting part;

[0042] 71 - through hole; 72 - guiding hole;

[0043] 81 - second mating part;

[0044] 91 - Cover body; 92 - Transparent cover; 93 - First sealing ring. Detailed implementation mode

[0045] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present utility model.

[0046] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0047] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0048] As Figures 1 to 5 shown, this embodiment provides a mechanical instrument with an integrated signal output function, which can expand the functions of the mechanical instrument and improve the practicability and flexibility of use of the mechanical instrument. The mechanical instrument includes an instrument main body 1, a pointer 3, a circuit board 4 and a signal output member 5.

[0049] Among them, referring to Figure 1 , Figure 2 and Figure 3, a scale dial 2 is provided on the instrument body 1, a pointer 3 is rotatably arranged on the instrument body 1 for indicating the scale 21 on the scale dial 2, and a first sensing component is arranged on the pointer 3. A circuit board 4 is arranged on the instrument body 1, and a second sensing component 41 corresponding to a plurality of scales 21 on the scale dial 2 is arranged on the circuit board 4. When the pointer 3 rotates relative to the instrument body 1, the first sensing component can sequentially sense with a plurality of second sensing components 41. A signal output member 5 is communicatively connected to the circuit board 4, and the signal output member 5 is configured to be able to output the signal generated by the circuit board 4 when the first sensing component senses with the second sensing component 41.

[0050] For the mechanical instrument with integrated signal output function provided in this embodiment, by arranging a first sensing component on the pointer 3 and arranging a second sensing component 41 corresponding to a plurality of scales 21 on the scale dial 2 on the circuit board 4, when the pointer 3 rotates to indicate a certain scale 21 on the scale dial 2, the first sensing component on the pointer 3 can simultaneously sense with the second sensing component 41 corresponding to this scale 21 on the circuit board 4, so that the circuit board 4 generates an induction signal corresponding to the scale 21 indicated by the pointer 3, and the induction signal is output through the signal output component, and the output induction signal corresponds to the scale value indicated by the pointer 3.

[0051] For example, when this mechanical instrument is applied to the fuel tank of a vehicle to measure the liquid level in the fuel tank, the signal output member 5 can be communicatively connected to the display device on the vehicle console, and the display device is used to display the scale value currently pointed by the pointer 3, that is, the liquid level of the fuel tank. In this way, the user can know the liquid level of the fuel tank measured by the mechanical instrument on the console.

[0052] That is to say, for this mechanical instrument with integrated signal output function, in addition to directly viewing the scale value indicated by the pointer 3, the scale value can also be output in the form of a signal to a carrier such as a display device for the user to view, expanding the function of the mechanical instrument and effectively improving the practicality and use flexibility of the mechanical instrument.

[0053] In other embodiments, this mechanical instrument with integrated signal output function can also be applied to a water tank to measure the liquid level in the water tank by using the mechanical instrument.

[0054] Optionally, the first sensing component includes a magnetic part, an induction circuit is arranged on the circuit board 4, and the second sensing component 41 includes a magnetic sensitive switch arranged in the induction circuit. The magnetic sensitive switch can conduct the induction circuit under the action of the magnetic field of the magnetic part, so that the circuit board 4 generates a corresponding signal. In this embodiment, the circuit board 4 is exemplarily a PCBA board, which is integrated with resistors, induction circuits, etc. and can complete the conversion and transmission of signals.

[0055] Exemplarily, the magnetic component is a magnet, which has stable magnetism and can enable the circuit board 4 to generate a stable induction signal. Further, an installation groove is provided on the pointer 3, and the magnet is fixedly embedded in the installation groove, with stable installation. The magnetic sensor switch is exemplarily a reed switch, which includes a glass tube and two magnetic reed switches sealed in the glass tube. There is a small gap between the two magnetic reed switches. When an external magnetic field acts on the reed switch, the magnetic reed switches will be affected by the magnetic force and bend, causing the two magnetic reed switches to contact, and then the circuit is turned on; when the external magnetic field disappears, the magnetic reed switches return to their original state and the circuit is disconnected. The reed switch has a simple structure, small volume, fast response speed and long service life.

[0056] In other embodiments, the first induction component is a magnetic component (such as a magnet or a magnet block), and the second induction component 41 can also be a Hall switch or the like.

[0057] Optionally, the scale disk 2 has a first threshold scale. Refer to Figure 3 , a third induction component 42 corresponding to the first threshold scale is provided on the circuit board 4. When the pointer 3 rotates to the point where the first induction component and the third induction component 42 are inductive, the signal output member 5 can output a first alarm signal. The first alarm signal can prompt the user that the value measured by the mechanical instrument has reached the first threshold scale, facilitating the user to take corresponding measures in a timely manner. For example, when the mechanical instrument is applied to the fuel tank of a vehicle, the first threshold scale corresponds to the low liquid level threshold of the fuel tank. The signal output member 5 is communicatively connected to the display device on the vehicle console. When the fuel level in the fuel tank reaches the low liquid level threshold, the pointer 3 points to the first threshold scale, the first induction component and the third induction component 42 are inductive, and the signal output member 5 transmits the first alarm signal to the display device. The display device prompts the user in the form of an indicator light, or the vehicle console prompts the user by emitting an alarm sound or voice, facilitating the reminder for the user to refuel in a timely manner. The indicator light can be yellow or red, etc., and the device that emits the alarm sound or voice can be a buzzer or a voice playback module, etc.

[0058] Further, the scale disk 2 has a second threshold scale, and a fourth induction component 43 corresponding to the second threshold scale is provided on the circuit board 4. When the pointer 3 rotates to the point where the first induction component and the fourth induction component 43 are inductive, the signal output member 5 can output a second alarm signal. The second alarm signal can prompt the user that the value measured by the mechanical instrument has reached the second threshold scale, facilitating the user to grasp the state of the measured device. For example, when the mechanical instrument is applied to the fuel tank of a vehicle, the second threshold scale corresponds to the high liquid level threshold of the fuel tank. When the fuel level in the fuel tank reaches the high liquid level threshold, the pointer 3 points to the second threshold scale, the first induction component and the fourth induction component 43 are inductive, and the signal output member 5 transmits the second alarm signal to the display device. The display device prompts the user in the form of an indicator light, or the vehicle console prompts the user by emitting an alarm sound or voice to remind the user that the fuel tank is full.

[0059] Exemplarily, the third induction component 42 and the fourth induction component 43 are both magnetic switches, such as reed switches.

[0060] In this embodiment, the first threshold scale is greater than the minimum scale on the dial 2, and the second threshold scale is less than the maximum scale on the dial 2, so as to avoid the situation where the oil level in the oil tank is too low or overflows. Figure 3 As shown, numbers S1 to S9 represent 9 second sensing components 41, corresponding to 9 scales 21 on the dial 2 respectively, number L1 represents the third sensing component 42, corresponding to the first threshold scale on the dial 2, and number H1 represents the fourth sensing component 43, corresponding to the second threshold scale on the dial 2.

[0061] In other embodiments, only the third sensing component 42 or the fourth sensing component 43 may be provided on the circuit board 4, and correspondingly, the signal output element 5 can output the first alarm signal or the second alarm signal.

[0062] Optionally, see Figure 1 The signal output element 5 includes a signal line 51, one end of which is connected to the circuit board 4, and the other end of the signal line 51 is provided with a connector 52, which is configured to be connected to a display device, and the display device can display the signal output by the signal line 51. The setting of the connector 52 can be conveniently connected to a display device, etc., and the signal generated by the circuit board 4 is converted into visual information, so that the user can grasp the current status of the device.

[0063] Exemplarily, the display device may be a display device (such as a display screen) on a center console of a vehicle, and the connector 52 may be a USB connector for convenient connection operation.

[0064] Optionally, see Figure 1 , Figure 4 and Figure 5, the mechanical instrument integrated with a signal output function further includes a guide member 6, a floating member 7, and a transmission member 8. One end of the guide member 6 is connected to the instrument main body 1, and the other end can extend into the liquid storage container for holding liquid. The floating member 7 is movably arranged on the guide member 6, and the floating member 7 can move relative to the guide member 6 under the buoyancy of the liquid in the liquid storage container. One end of the transmission member 8 is connected to the pointer 3, and the other end is in transmission cooperation with the floating member 7. When the floating member 7 moves relative to the guide member 6, it can drive the transmission member 8 to drive the pointer 3 to rotate. When the liquid level in the liquid storage container changes, the floating member 7 rises or falls with the liquid level, that is, the floating member 7 moves up or down relative to the guide member 6. During the movement of the floating member 7, it drives the transmission member 8 to rotate, so that the pointer 3 rotates synchronously with the transmission member 8, realizing that the pointer 3 indicates different scales 21 on the scale disk 2, and further converting the liquid level in the liquid storage container into the scale 21 on the scale disk 2. The guide member 6 plays a guiding role in the movement of the floating member 7, and can limit the floating member 7 to move only in the depth direction of the liquid in the liquid storage container, so that the pointer 3 accurately indicates the liquid level in the liquid storage container.

[0065] Exemplarily, the liquid storage container is the fuel tank of a vehicle. After the floating member 7 and the guide member 6 are placed in the fuel tank, the floating member 7 moves up or down relative to the guide member 6 under the buoyancy of the oil.

[0066] In other embodiments, the liquid storage container can also be a water tank, or other containers for holding liquid and requiring liquid level measurement.

[0067] Optionally, refer to Figure 1 , a guide hole 72 is provided on the floating member 7, and the guide member 6 passes through the guide hole 72 and is in sliding cooperation with the guide hole 72. The sliding cooperation between the guide hole 72 and the guide member 6 can make the floating member 7 move more stably along the extending direction of the guide member 6, reducing the moving resistance of the floating member 7.

[0068] Exemplarily, two guide members 6 are spaced apart on the instrument main body 1. Correspondingly, two guide holes 72 are provided on the floating member 7, and the two guide members 6 are in one-to-one sliding cooperation with the two guide holes 72, improving the moving stability of the floating member 7.

[0069] Optionally, refer to Figure 1 , a through hole 71 is provided on the floating member 7, the transmission member 8 passes through the through hole 71, a first mating portion is provided on the inner wall of the through hole 71, and a second mating portion 81 is provided on the outer peripheral surface of the transmission member 8. When the floating member 7 moves relative to the guide member 6, it can drive the transmission member 8 to rotate under the interaction between the first mating portion and the second mating portion 81. That is, through the interaction between the first mating portion and the second mating portion 81, the linear motion of the floating member 7 is converted into the rotational motion of the transmission member 8, realizing that the pointer 3 indicates the scale 21 to represent the liquid level height in the liquid storage container.

[0070] Exemplarily, the first mating portion is a first helical structure provided on the inner wall of the through hole 71, and the second mating portion 81 is a second helical structure provided on the outer peripheral surface of the transmission member 8. When the floating member 7 moves along the guide member 6 under the action of liquid buoyancy, the first helical structure is helically engaged with the second helical structure, thereby driving the transmission member 8 to rotate.

[0071] Optionally, a shaft hole is provided on the instrument body 1. Refer to Figure 4 and Figure 5 , a rotating shaft 31 is provided on the pointer 3. The rotating shaft 31 passes through the shaft hole and is rotationally engaged with the shaft hole. The transmission member 8 is fixedly connected to the rotating shaft 31. When the floating member 7 drives the transmission member 8 to rotate, it drives the rotating shaft 31 to rotate in the shaft hole, so that the pointer 3 rotates synchronously with the rotating shaft 31 to indicate different scales 21 on the scale disk 2.

[0072] Optionally, refer to Figure 5 , a plugging cavity (not shown in the figure) is provided on the rotating shaft 31. One end of the transmission member 8 is inserted into the plugging cavity and is limited and fixed in the plugging cavity by a locking pin 32 to achieve the fixed connection between the rotating shaft 31 and the transmission member 8, which is convenient for disassembly and assembly. Further, a limiting snap ring 33 is clamped on the rotating shaft 31. The limiting snap ring 33 can axially limit the rotating shaft 31 in the shaft hole to prevent the pointer 3 from axially moving and ensure the stable rotation of the pointer 3.

[0073] Optionally, refer to Figure 1 and Figure 4 , a limiting member 61 is provided at one end of the guide member 6 away from the instrument body 1. The limiting member 61 can limit the moving stroke of the floating member 7. One end of the transmission member 8 away from the pointer 3 is rotationally connected to the limiting member 61. That is, the limiting member 61 can limit the maximum downward moving stroke of the floating member 7 relative to the guide member 6 to prevent the floating member 7 from moving downward and disengaging from the guide member 6. Connecting the transmission member 8 to the limiting member 61 rotationally can prevent the limiting member 61 from interfering with the rotation of the transmission member 8. At the same time, the limiting member 61 can prevent the transmission member 8 from swinging and ensure the rotational stability of the transmission member 8.

[0074] Exemplarily, the limiting member 61 is a cylinder. A rotating groove is provided on the limiting member 61. The transmission member 8 is a rod-shaped structure. One end of it away from the pointer 3 is inserted into the rotating groove and is rotationally engaged with the rotating groove to achieve the rotational connection between the transmission member 8 and the limiting member 61.

[0075] Optionally, refer to Figure 4 and Figure 5, the mechanical instrument with integrated signal output function further includes a protective cover 9. A receiving groove 11 is recessed on the instrument body 1. The circuit board 4 and the scale dial 2 are both located in the receiving groove 11. The protective cover 9 is detachably connected to the instrument body 1 and can cover the notch of the receiving groove 11. The area of the protective cover 9 opposite to the scale dial 2 is a transparent structure. The arrangement of the receiving groove 11 and the protective cover 9 can protect the pointer 3 and the scale dial 2, prevent foreign objects from interfering with the rotation of the pointer 3, and prevent the scale dial 2 from being contaminated, ensuring the normal operation of the mechanical instrument. The transparent structure part of the protective cover 9 can clearly display the scale 21 on the scale dial 2, facilitating the user to read the value.

[0076] In this embodiment, referring to Figure 5 , the circuit board 4 is located below the scale dial 2, and the pointer 3 is located above the scale dial 2. When the pointer 3 rotates above the scale dial 2 until a first sensing component is aligned with a certain second sensing component 41 on the circuit board 4 below, the corresponding sensing circuit on the circuit board 4 is turned on, and a corresponding signal is output through the signal output component 5.

[0077] Optionally, referring to Figure 4 and Figure 5 , the protective cover 9 includes a cover body 91 and a transparent cover 92 (the above-mentioned transparent structure). The cover body 91 is a ring-shaped structure, and the transparent cover 92 is fixed on the cover body 91 (for example, it can be bonded). Through the transparent cover 92, the scale 21 indicated by the pointer 3 on the scale dial 2 can be observed. Further, the transparent cover 92 and the cover body 91 are sealed and connected through a first sealing ring 93 to prevent liquid from entering the receiving groove 11 and avoid circuit board 4 failures. Exemplarily, the first sealing ring 93 is a rubber sealing ring with reliable sealing.

[0078] Further, the ring-shaped cover body 91 is provided with internal threads, and the outer peripheral surface of the instrument body 1 is provided with external threads. The cover body 91 is screwed onto the instrument body 1, which is convenient for disassembly and assembly and has a reliable connection.

[0079] Optionally, the mechanical instrument with integrated signal output function further includes a fixing ring 10. The fixing ring 10 is located in the receiving groove 11, and the protective cover 9 can press the fixing ring 10 against the scale dial 2. That is, after the protective cover 9 is installed in place, both ends of the fixing ring 10 respectively abut against the protective cover 9 and the scale dial 2, which can prevent the scale dial 2 from shifting in the receiving groove 11 and ensure the accuracy of the scale 21 indicated by the pointer 3.

[0080] Optionally, a connecting portion 12 is provided on the side of the instrument body 1 facing away from the receiving groove 11. The liquid storage container has an installation port. The instrument body 1 is detachably connected to the installation port and can block the installation port to prevent liquid leakage.

[0081] Exemplarily, the liquid storage container is a fuel tank of a vehicle, the mounting port is in the form of a threaded hole, and the outer peripheral surface of the connecting portion 12 is provided with an external thread. The instrument body 1 can be installed to the mounting port by screwing the thread, and the connection is stable and reliable, and easy to assemble and disassemble.

[0082] Further, see Figure 1 and Figure 2 The instrument body 1 is provided with an operating part 13, and the instrument body 1 can be conveniently screwed by grasping the operating part 13, thereby improving the convenience of disassembly and assembly of the mechanical instrument on the oil tank. Exemplarily, the operating part 13 is an annular structure arranged around the outer circumference of the instrument body 1, and the cross section of the annular structure is a hexagon, which helps the operator to apply force. In other embodiments, the operating part 13 can also be a quadrilateral, a pentagon, a circular ring, etc., and anti-skid protrusions or anti-skid grooves can also be provided on the outer circumference of the operating part 13. Figure 2 The "FUEL" on the middle scale 2 means "fuel" or "fuel oil", and is used to indicate that the mechanical instrument is used to measure the liquid level of the fuel in the fuel tank. In other embodiments, if the mechanical instrument is used to measure the liquid level of the water tank, the marking on the scale 2 can be changed accordingly.

[0083] See also Figure 5 The connecting portion 12 is provided with a second sealing ring 14, and the connecting portion 12 is sealed and connected to the installation port through the second sealing ring 14, so as to ensure that the instrument body 1 can seal the installation port to prevent leakage. For example, the second sealing ring 14 is a rubber sealing ring, and the sealing is reliable.

[0084] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A mechanical instrument integrating a signal output function, characterized in that, Comprising: An instrument main body (1) with a scale dial (2) provided thereon; A pointer (3) rotatably arranged on the instrument main body (1), and a first induction component is provided on the pointer (3); A circuit board (4) arranged on the instrument main body (1), and a second induction component (41) corresponding one by one to a plurality of graduations (21) on the scale dial (2) is provided on the circuit board (4). When the pointer (3) rotates relative to the instrument main body (1), the first induction component can sequentially induce a plurality of the second induction components (41); A signal output member (5) communicatively connected to the circuit board (4), and the signal output member (5) is configured to be able to output the signal generated by the circuit board (4) when the first induction component induces the second induction component (41); 2. The mechanical instrument with an integrated signal output function according to claim 1, wherein The scale dial (2) has a first threshold graduation, and a third induction component (42) corresponding to the first threshold graduation is provided on the circuit board (4). When the pointer (3) rotates to the position where the first induction component induces the third induction component (42), the signal output member (5) can output a first alarm signal; And / or, the scale dial (2) has a second threshold graduation, and a fourth induction component (43) corresponding to the second threshold graduation is provided on the circuit board (4). When the pointer (3) rotates to the position where the first induction component induces the fourth induction component (43), the signal output member (5) can output a second alarm signal; 3. The mechanical instrument with an integrated signal output function according to claim 1, characterized in that, The first induction component includes a magnetic member, an induction circuit is provided on the circuit board (4), and the second induction component (41) includes a magnetic sensitive switch arranged on the induction circuit. The magnetic sensitive switch can conduct the induction circuit under the action of the magnetic field of the magnetic member; 4. The mechanical instrument with an integrated signal output function according to claim 1, characterized in that, The signal output member (5) includes a signal line (51), one end of the signal line (51) is communicatively connected to the circuit board (4), and the other end of the signal line (51) is provided with a connector (52). The connector (52) is configured to be connected to a display device, and the display device can display the signal output by the signal line (51); 5. The mechanical instrument with an integrated signal output function according to any one of claims 1-4, characterized in that The mechanical instrument with an integrated signal output function further includes: A guiding member (6) with one end connected to the instrument main body (1) and the other end capable of extending into a liquid storage container for holding liquid; A floating member (7) movably arranged on the guiding member (6), and the floating member (7) can move relative to the guiding member (6) under the buoyancy of the liquid in the storage container; A transmission member (8) with one end connected to the pointer (3) and the other end in transmission cooperation with the floating member (7). When the floating member (7) moves relative to the guiding member (6), it can drive the transmission member (8) to drive the pointer (3) to rotate.

6. The mechanical instrument with an integrated signal output function according to claim 5, characterized in that, A through hole (71) is provided on the floating member (7), the transmission member (8) is inserted through the through hole (71), a first mating portion is provided on the inner wall of the through hole (71), a second mating portion (81) is provided on the outer peripheral surface of the transmission member (8), and when the floating member (7) moves relative to the guiding member (6), the transmission member (8) can be driven to rotate under the interaction of the first mating portion and the second mating portion (81). And / or, a guiding hole (72) is provided on the floating member (7), the guiding member (6) is inserted through the guiding hole (72) and is in sliding fit with the guiding hole (72).

7. The mechanical instrument with an integrated signal output function according to claim 5, characterized in that, A shaft hole is provided on the instrument main body (1), a rotating shaft (31) is provided on the pointer (3), the rotating shaft (31) is inserted through the shaft hole and is in rotational fit with the shaft hole, and the transmission member (8) is fixedly connected to the rotating shaft (31).

8. The mechanical instrument with an integrated signal output function according to claim 5, characterized in that, A limiting member (61) is provided at one end of the guiding member (6) away from the instrument main body (1), the limiting member (61) can limit the moving stroke of the floating member (7), and one end of the transmission member (8) away from the pointer (3) is rotatably connected to the limiting member (61).

9. The mechanical instrument with an integrated signal output function according to any one of claims 1-4, characterized in that, The mechanical instrument with an integrated signal output function further includes a protective cover (9). A receiving groove (11) is recessed on the instrument main body (1). The circuit board (4) and the scale disk (2) are both located in the receiving groove (11). The protective cover (9) is detachably connected to the instrument main body (1) and can cover the notch of the receiving groove (11). The area of the protective cover (9) opposite to the scale disk (2) is a transparent structure.

10. The mechanical instrument with an integrated signal output function according to claim 9, characterized in that, The mechanical instrument with an integrated signal output function further includes a fixing ring (10). The fixing ring (10) is located in the receiving groove (11), and the protective cover (9) can press the fixing ring (10) against the scale disk (2).

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