KR20190061584A - Digital oil meter injection gun and oil injection system - Google Patents

Abstract

The present invention relates to a digital oil meter injection gun, which can simply display an injection amount during injection of oil for a vehicle such as engine oil and transmission oil, additionally save, manage and control an accumulated injection amount, and also notice a consumer instantly regarding the injection amount to enhance reliability with respect to quantitative injection and to be switchable for urea injection through a simple manipulation. The present invention comprises: a gripper opening and closing unit provided with a trigger for opening and closing a flow path at a lower part of a body; an injection amount metering unit provided with an internal chamber for distributing the oil, sensing a flux of the oil flowing via the internal chamber and calculating and displaying the flux as the injection amount of the oil; and a nozzle unit, if an oil pressure is generated at a set value or more, getting opened to discharge the oil and to close the flow path and if the oil pressure arrives at less than a set value, cutting off discharge of the oil, wherein the injection amount metering unit is provided with a gear, rotating according to the flow of the oil, in the internal chamber, whereas two oval shaped gears having a long shaft and a short shaft are engaged to rotate in a reverse direction, and is provided with an rpm detection sensor sensing the rpm of one of the gears, and with a controller calculating the injection amount of the oil based on the rpm of the gear sensed by the rpm detection sensor to display the injection amount of the oil on a display.

Description

Technical Field [0001] The present invention relates to a digital oil meter injection gun,

The present invention relates to an oil injection gun, and more particularly, to an oil injection gun which not only displays an injection amount when injecting an automobile oil such as an engine oil and a mission oil, but also manages and supervises the accumulated injection amount, The present invention relates to a digital oil meter injection gun capable of switching to the injection of urea water through a simple operation and an oil lubrication system including the same.

In general, lubricants are injected into automobiles to reduce friction and wear of various devices and to help them operate smoothly. Among them, engine oil and transmission oil are representative.

Engine oil circulates through oil tanks, oil strainer, oil pump, oil filter, oil cooler, metal friction surface, oil tank, and reduces friction and abrasion of the equipment due to the engine operation.

In the case of transmission oil, it prevents damages to the transmission formed by combining the fluid torque converter and the planetary gear unit, and helps smooth operation.

Such automotive engine and transmission fluids are recommended to be replaced at regular intervals, as the effects of lubrication, rust prevention, cooling, and cleaning are reduced over time.

As described above, most of the work of exchanging the engine oil and the transmission oil of the automobile is performed by hand, and although some injection devices are used, simple nozzles for oil injection have been used to manage and supervise the injection amount.

Particularly, there has been a problem in that it is difficult to reliably determine whether or not a metered amount is injected since there is no method to confirm from the viewpoint of the consumer whether the existing oil is discharged after replacement of the engine oil and the transmission oil. Usually, it takes a lot of time to discharge the engine oil and the transmission oil. If you are uncertain about it, you may need to replenish the new oil with only a part of the existing oil. It was easy to take a wrong gain. On the other hand, consumers are confronted with a complex problem of damaging the car because of the financial loss and the replacement of some oil, but there is no way to check and check it.

Korean Patent Registration No. 0655998 (December 4, 2006)

It is therefore an object of the present invention to provide an apparatus and a method for controlling an injection amount of an automotive engine oil such as an engine oil and a mission oil, And digital oil meter injecting gun which enables to switch to injection of urea water through simple operation by increasing the reliability of dosing by making it possible to notify the customer directly to the injection amount. To provide an oil lubrication system.

In order to accomplish the above object, according to the technical idea of the present invention, there is provided a digital oil meter injection gun having a flow path through which oil flows along a longitudinal direction of the opening / closing part body and a rear end part connected to an oil storage tank by a hose A handle opening / closing part provided under the opening / closing part body and having a trigger for opening and closing the passage; An injection amount measuring unit for detecting an amount of oil flowing through the inner chamber and calculating and indicating the amount of oil to be injected by the inner chamber, the inner chamber communicating with the distal end of the handle opening / closing unit and circulating the oil in a filled state; A nozzle pipe communicating with a distal end portion of the injection amount measuring unit; and an oil pipe disposed at a distal end of the nozzle pipe, the oil pipe being opened when the oil path is opened in the handle opening / Wherein the injection amount measuring unit includes a gear which rotates in accordance with the flow of the oil in the inner chamber and two gears of elliptical shape having a long shaft and a short shaft are connected to each other A rotation speed detecting sensor for detecting a rotation speed of one of the gears, and a control unit for calculating an injection amount of the oil based on the rotation speed of the gear detected by the rotation speed detecting sensor, And a controller for controlling the operation of the motor.

Here, the injection amount measuring unit includes a measurement unit casing having an inner chamber for accommodating gears, a substrate on which the controller is integrated, and a mounting space in which the display is located. In the measurement unit casing, And the inner chamber is bolted to cover the lower cover in a state in which the lower portion of the inner chamber is opened, and the rotation axis of the gear is installed in a state where the upper end is fixed to the ceiling of the inner chamber So that it can be easily replaced by releasing the bolt fastening from the measuring unit casing, separating the lower cover, and then separating the gear from the rotary shaft downward.

In addition, the gear is provided with two gears for exclusive use of oil-only gears made of carbon steel and a gear element-specific gear made of stainless steel so as to be selectively mounted in the inner chamber of the measuring unit casing, And the like.

In addition, magnets are additionally mounted on both ends of the long axis of one of the two gears, a seating groove is formed on the upper surface of the lower cover detachable from the measuring casing, and a black box is mounted on the seating groove, Wherein the black box includes a flat plate-like flat plate casing fitted and seated in the seating groove to form a bottom surface of the inner chamber, a rotatable plate having a length corresponding to the long axis of the gear in the flat plate casing, A rotor mounted in the flat casing and provided with a magnet corresponding to a magnet mounted on the gear to rotate together by a magnetic force when the gear rotates; The amount of oil injected is calculated based on the number of rotations of the rotor, and the calculated amount of oil injected In that it comprises a magnetic sensor, a process unit, a memory chip is a composite module to perform a function that continuously stores the data, respectively, it can be characterized.

In addition, the flat casing of the black box is made of stainless steel and is sealed so as not to be opened without breakage, and has a rubber band for breaking which is cut in the circumferential direction at the center of the flat casing, So that the flat casing can be opened and broken on both sides.

The inner surface of the rubbing rubber band may be formed in a zigzag shape with a half-sliced wave line along the longitudinal direction.

Further, the controller may display the present oil injection amount and the accumulated oil injection amount, which are made by the new operation of the trigger together, on the display.

Further, the injection amount measuring unit may further include a communication interface to transmit data of the present oil injection amount calculated by the controller to an external device so that the external device may include a card terminal, To be printed on the recording medium.

On the other hand, the oil injection system of the present invention is characterized by including the above-described digital oil meter injection gun and an oil tank for supplying oil to the digital oil meter injection gun.

The digital oil meter injection gun and the oil injection system having the digital oil meter injection gun according to the present invention not only displays the injection amount when injecting automobile oil such as engine oil and mission oil but also can manage and supervise the injection amount, So that the reliability of the dosing can be increased.

Further, since the gear of the carbon steel material can be replaced with the gear of the stainless steel material through the simple operation of separating the lower cover, the present invention can be easily changed into the injection of urea water for oil injection.

In addition, the present invention has a black box which is difficult to operate when it is broken once and can not be repaired, and operates in conjunction with gears, but calculates and stores the oil injection amount in a totally independent path without going through the controller. Can be utilized.

1 and 2 are a top plan view and a bottom plan view of a digital oil meter injection gun according to an embodiment of the present invention.
3 is a side sectional view showing the overall configuration of a digital oil meter injection gun according to an embodiment of the present invention.
4 and 5 are views for explaining a specific configuration of the handle opening / closing part in the digital oil meter injection gun according to the embodiment of the present invention, before and after the operation of the enlarged portion " A "
6 is an exploded perspective view for explaining the configuration of the injection amount measuring unit in the digital oil meter injection gun according to the embodiment of the present invention.
7 is a partial cut-away view for explaining the black box configuration of the injection amount measuring unit in the digital oil meter injection gun according to the embodiment of the present invention.
8 is a bottom view of the injection amount measuring unit that is opened downward in the digital oil meter injection gun according to the embodiment of the present invention.
9 is a plan view of the injection amount measuring unit in the digital oil meter injection gun according to the embodiment of the present invention.
10 is a diagram for calculating and displaying the injection amount of the injection amount measuring part in the digital oil meter injection gun according to the embodiment of the present invention
Figs. 11 and 12 are views for explaining the specific configuration of the handle nozzle unit in the digital oil meter injection gun according to the embodiment of the present invention, before and after the operation of the enlarged portion " B "

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital oil meter injection gun and an oil lubrication system including the same according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention, and are actually shown in a smaller scale than the actual dimensions in order to understand the schematic structure.

Also, the terms first and second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIGS. 1 and 2 are a top perspective view and a bottom perspective view of a digital oil meter injection gun according to an embodiment of the present invention, and FIG. 3 is a side sectional view showing the overall configuration of a digital oil meter injection gun according to an embodiment of the present invention.

As shown in the figure, the digital oil meter injection gun according to the embodiment of the present invention includes a handle H which is connected to an oil storage tank by a hose to receive oil, and includes a handle H and a trigger 112 for opening / An injection amount measuring unit 120 for calculating and displaying the amount of oil injected; and a control unit 110 for allowing the oil to be discharged only when the oil passage is opened by the handle opening and closing unit 110, As shown in FIG.

The digital oil meter injection gun according to an embodiment of the present invention having such major components not only displays the injection amount when injecting automobile oil such as engine oil and mission oil but also can manage and supervise the accumulated injection amount As a matter of course, it is possible to promptly inform the customer of the injection amount, thereby increasing the reliability of the dosing and switching to the injection of urea water by a simple operation.

Hereinafter, a digital oil meter injection gun according to an embodiment of the present invention will be described in more detail with reference to the above-described components.

4 and 5 are a state before and after the operation of the enlarged portion " A " in Fig. 3 for explaining a specific configuration of the handle opening and closing part in the digital oil meter injection gun according to the embodiment of the present invention.

The handle opening and closing part 110 includes a connection part C1 connected to the oil storage tank hose at the rear end of the opening and closing part body 111 to receive oil from the oil storage tank, And a trigger 112 is provided below the distal end of the handle H to open and close the internal flow paths 111a and 111b through which the oil flows.

The handle opening and closing part 110 is internally provided with oil passages 111a and 111b through which the oil flows along the longitudinal direction of the opening and closing body 111 starting from the connecting part C1 provided at the rear end of the opening and closing part body 111 4, the flow paths 111a and 111b are blocked in the lowered state as shown in FIG. 4, and when they rise as shown in FIG. 5, the flow path is opened to permit the flow of oil And a valve piston 114 which is connected to the valve body. The upper portion 114a of the valve piston 114 is formed to have a larger diameter than the lower portion 114b and the upper portion 114a of the valve piston 114 is inserted into the inlet hole 113a formed in the piston body 113, The upper portion 114a of the valve piston 114 formed with a large diameter is positioned on the upper side of the inflow hole 113a formed in the piston body 113 while the flow passages 111a and 111b are blocked, 113a to allow the flow of oil in the oil passages 111a, 111b. And is elastically supported to descend by the compression spring 115 in the case of the valve piston 114. The piston body 113 serves to guide the lifting and lowering of the valve piston 114 in the middle of the oil passages 111a and 111b formed in the opening and closing body 111. The oil passage 111a To the outflow-side flow path 111b while allowing the valve piston 114 to completely perform the oil flow blocking and permitting function.

A U-packing seal 116 is provided between the upper end of the piston body 113 and the valve piston 114 to block oil leakage. The trigger 112 is coupled to the lower portion of the opening and closing body 110 of the knob opening and closing part 110 so as to be rotatable about a pin 112a of the trigger 112 and is coupled with a lower end of the valve piston 114, 114 can be raised and lowered.

The following will describe the injection amount measurement unit 120, which is a component that plays a key role in the present invention.

Fig. 4 and Fig. 5 show the state before and after the operation of the enlarged portion " A " in Fig. 3 for explaining the specific configuration of the handle opening and closing part in the digital oil meter injection gun according to the embodiment of the present invention, FIG. 7 is an exploded perspective view of a digital oil meter injecting gun according to an embodiment of the present invention. FIG. 7 is a cross- 9 is a plan view of the injection amount measuring part in the digital oil meter injecting gun according to the embodiment of the present invention. FIG. 8 is a bottom view of the injection amount measuring part opened downward in the digital oil meter injection gun according to the embodiment of the present invention, And FIG. 10 is a diagram for calculating and displaying the injection amount of the injection amount measuring part in the digital oil meter injection gun according to the embodiment of the present invention.

The injection amount measuring part 120 has an inner chamber CA communicating with the distal end of the handle opening and closing part 110 to circulate the oil and detects the flow rate of the oil flowing through the inner chamber CA, And displays it. In this case, not only the amount of oil injected is displayed simply, but the cumulative injected amount is preserved to manage and supervise, and the amount of injected oil can be notified to the consumer immediately, thereby enhancing the reliability of dosing. And is configured to be switchable for injection.

The injection amount measuring unit 120 includes a measurement unit casing 121, a pair of gears 123, a substrate 124 on which a controller 124a and a communication interface 124b are integrated, a display 125, a battery 127, and a black box 128.

The measurement unit casing 121 includes a casing main body 121a, a lower cover 122 and an upper cover 126. The casing main body 121a accommodates a gear 123 and includes an oil inlet 121a and an outlet And a mounting space 121e in which the display 124 and the display 124 are mounted are formed on the inner chamber CA communicating with the controller 124a and the communication interface 124b. In this case, the inner chamber CA and the mounting space 121e of the casing main body 121a are formed at the lower part and the upper part of the casing main body 121a with the horizontal partition plate interposed therebetween. And the upper end of the rotation shaft 123b of the gear 123 is fixed to the ceiling of the inner chamber CA so that the cover 122 can be simply fastened with the bolt 122b.

It is possible to easily replace the gear 122 by separating the lower cover 122 by releasing the bolt 122b from the measuring unit casing 121 and separating the gear 123 from the rotating shaft 123b downward. The replacement of the gear 123 may be performed due to the damage of the gear 123 in use or for the purpose of replacing the exclusive gear 123 made of different materials with the gear 123 dedicated to the rivet.

A battery housing 121c for accommodating two batteries 127 is integrally formed on the side surface of the casing main body 121. In the case of the battery housing 121c, And a housing cap 121d is provided. A seating groove 122a is formed on the upper surface of the lower cover 122 to stably install the black box 128. In the case of the upper cover 126, And has an opening or a transparent window to be displayed so that the calibration and controller control button 125c can be positioned.

The gear 123 is fitted in a rotary shaft 123b fixed to the ceiling of the inner chamber CA to rotate in accordance with the flow of the oil flowing in the inner chamber CA. The gear 123 is not a general circular shape but two elliptical gears 123 having a long axis and a short axis are paired to form a pair. When the flow of oil starts even in a stationary state, Even with a small amount of oil flow, the initial rotation is clearly achieved. Further, magnets 123b are mounted on both ends of the long axis of the gear 123, respectively. The structure in which the magnets 123b are mounted on both ends of the long axis serves to maximize the spacing between the magnets 123b and to rotate the rotors 128c of the black box 128 to be described later.

 The controller 124a, the communication interface 124b and the rotation speed sensor 124c are installed on the substrate 124 in a nearby upper mounting space 121e in which the gear 123 is installed. 10, the controller 124a is connected to the rotational axis 123b of the gear 123 to receive the rotational speed data of the gear 123 from the rotational speed sensor 124c that senses the rotational speed, To calculate the amount of oil injected. Then, as shown in FIG. 9, the current oil injection amount 125a and the accumulated oil injection amount 125b are divided and displayed on the display 125 together.

Further, it is possible to transmit the data of the current oil injection amount calculated by the controller 124a to the external device and notify it by the configuration including the communication interface 124b. Such an external device includes the card terminal, To be printed on this card slip. This makes it possible for the operator and the customer to immediately check the correct amount of oil injected, thereby eliminating distrust of oil dosing and establishing a high degree of reliability on both sides.

The display 125 is mounted on the substrate 124 on which the controller 124a, the communication interface 124b and the rotation speed sensor 124c are integrated as shown in the figure, 121e and is securely covered and protected by the upper cover 126 so as not to be separated. 9, the current oil injection amount 125a and the accumulated oil injection amount 125b are displayed numerically. As shown in FIG. 9, although not shown in detail, depending on the operation of the calibration and controller control buttons 125c The amount of battery, the progress of calibration, and the unit of injection amount are additionally displayed.

The battery 127 is installed in the battery housing 121c and supplies power to all elements requiring power to operate in the injection amount measuring unit 120. [ The controller 124a, the communication interface 124b, the rotation speed sensor 124c, the display 125, and the module chip 128e of the black box 128 are required to supply power.

The black box 128 includes a flat plate-like casing 128a which is fitted in a seating groove 122a formed on the upper surface of the lower cover 122 to form a bottom surface of the inner chamber CA, A magnet 128d corresponding to a magnet 123b mounted on the gear 123 is mounted at both ends of the casing 128a so as to be rotatable with a length corresponding to the longitudinal axis of the gear 123, A rotor 128c that rotates together with the center shaft 128ca by the magnetic force when the rotor 123 rotates and a gear 123 disposed in the vicinity of the rotor 128c inside the flat casing 128a, And a module chip 128e for calculating the amount of oil injected by the method of measuring the number of rotations of the rotor 128c instead of the number of rotations of the rotor 128c and for continuously storing the calculated data of the oil injection amount. The module chip 128e includes a magnetic sensor that senses the magnetic force of the magnet 128d mounted on the rotor 128c, a rotation number of the rotor 128c based on the data sensed by the magnetic sensor, A process unit for calculating the oil injection amount by substituting the rotational speed of the gear 123 with the rotational speed of the gear 123, and a memory for continuously storing the oil injection amount calculated by the process unit.

It should be noted that the configuration of such a black box 128 is made such that even when an external operation is intervened on the controller 124a side, it is possible to reliably calculate and store the oil injection amount through a path completely independent of the controller 124a.

The flat casing 128a of the black box 128 is made of stainless steel as shown in FIG. 7 and is sealed so that the inside thereof is not opened without breakage. The center of the flat casing 128a is horizontally And the flat plate casing 128a is ruptured on both sides of the rupture rubber band 128b so as to be opened. If the flat casing 128a is broken around the rubber band 128b for breaking, it is impossible to restore the flat casing 128a to its proper shape, and it is not possible for someone to manipulate the black box 128 in the middle.

A half-sliced wave line 128ba is formed on the inner surface of the breaking rubber band 128b in a zigzag shape along the longitudinal direction. It is possible to more easily break the flat plate casing 128a through the broken line 128ba. When the flat casing 128a is fractured on both sides, the module chip 128e, which is formed by combining the magnetic sensor, the process unit, and the memory, is exposed to the outside, so that the module chip 128e is exposed to the flat plate casing 128a. So that data analysis can be performed.

Figs. 11 and 12 show the state before and after operation of the enlarged portion " B " in Fig. 3 for explaining the specific configuration of the handle nozzle portion in the digital oil meter injection gun according to the embodiment of the present invention.

The nozzle unit 130 includes a nozzle pipe P1 communicating with the distal end of the injection amount measuring unit 120 and a nozzle pipe P1 provided at the distal end of the nozzle pipe P1 and operated by a trigger 112 from the handle opening / When the oil pressure is greater than a predetermined level, the oil is discharged and the oil passage is closed at the handle opening and closing part 110, so that only the hydraulic pressure less than the predetermined pressure is closed.

The nozzle unit 130 includes a nozzle body 131 having an inlet port 131a and an outlet port 131b and defining an internal flow path 131c and a nozzle body 131 extending and retracting from the internal flow path 131c of the nozzle body 131, A spring 133 for elastically supporting the nozzle piston 131 so as to have a tendency to advance the nozzle piston 131 to close the outlet 131b of the nozzle body 131, And a U-packing seal 134 installed around the outer periphery of the piston 132 to seal the gap between the nozzle piston 132 and the nozzle body 131.

The nozzle piston 131 is provided with an inner hole 132a formed from the rear end to the intermediate point and has an oil hole communicating with the inner hole 132a on the wall surface that is forwardly offset from the point where the U- An outflow hole 132b is formed. According to the configuration of the nozzle piston 131, when the oil does not flow, the nozzle piston 131 is advanced by the spring 133 and the outlet 131b of the nozzle body 131 is closed However, when oil flows due to the operation of the trigger 112 of the knob opening and closing part 110, the oil introduced through the inlet port 131b of the nozzle body 131 flows through the inner hole 132a of the nozzle piston 131 And is discharged through the oil outlet hole 132b. At this time, the oil discharged from the oil outlet hole 132b acts on the U-packing seal 134 to push the nozzle piston 131 backward, and the outlet 131b of the nozzle body 131 blocked by the tip of the nozzle piston 131 The oil is finally discharged and the oil is injected. The nozzle unit 130 prevents the oil from flowing out unnecessarily even if part of the oil is injected into the entire flow path regardless of whether the flow of the oil is permitted or blocked in the digital oil meter injection gun according to the embodiment of the present invention. The injection amount measuring unit 120 plays an important role in precisely measuring the oil injection amount by continuously maintaining the oil filled state.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

110: handle opening / closing part 120: injection amount measuring part
121: measuring body 122: bottom cover
124: substrate 124a:
124b: Communication interface 124c:
125: display 126: upper cover
123: gear 128: black box
128b: rubbing rubber band 130: nozzle part

Claims (9)

A handle opening / closing part provided with a flow path through which oil flows along the longitudinal direction of the opening / closing part body, a rear end part connected to the oil storage tank by a hose to receive oil, and a trigger for opening /
An injection amount measuring unit for detecting an amount of oil flowing through the inner chamber and calculating and indicating the amount of oil to be injected by the inner chamber, the inner chamber communicating with the distal end of the handle opening / closing unit and circulating the oil in a filled state;
A nozzle pipe communicating with a distal end portion of the injection amount measuring unit; and an oil pipe disposed at a distal end of the nozzle pipe, the oil pipe being opened when the oil path is opened in the handle opening / And a nozzle portion that is closed when the oil pressure of the oil passage is closed,
The injection amount measuring unit is provided with a gear rotating in accordance with the flow of oil in the inner chamber so that two elliptical gears having long and short axes are engaged with each other and rotated in the reverse direction, And a controller for calculating an injection amount of oil based on the number of revolutions of the gear detected by the revolution number detection sensor and displaying the amount of oil injection on the display. The method according to claim 1,
Wherein the injection amount measuring unit includes an inner chamber for accommodating the gear and a measurement casing formed with a substrate on which the controller is integrated and a mounting space in which the display is located,
The inner chamber and the mounting space of the metering unit casing are respectively formed at the lower part and the upper part of the space between the horizontal partition plates. The inner chamber allows the lower cover to be bolted and covered with the lower part opened, And the upper cover is fixed to the ceiling of the inner chamber so that the lower cover can be easily removed by releasing the bolt fastening from the measuring casing and separating the gear from the rotary shaft downward. Digital Oil Meter Injection Gun. 3. The method of claim 2,
The gear is provided with two gears, one made of carbon steel and the other made of stainless steel, so that it can be selectively installed in the inner chamber of the measuring unit casing, Wherein the oil is injected into the injection port. 3. The method of claim 2,
In either one of the two gears, magnets are additionally mounted on both ends of the major axis,
A bottom cover detachable from the measuring unit casing is provided with a seating groove on an upper surface thereof and a black box is mounted on the seating groove,
Wherein the black box includes a flat plate-like flat plate casing fitted and seated in the seating groove to form a bottom surface of the inner chamber, a rotatable plate having a length corresponding to the long axis of the gear in the flat plate casing, A rotor mounted in the flat casing and provided with a magnet corresponding to a magnet mounted on the gear to rotate together by a magnetic force when the gear rotates; A process unit, and a memory chip, each of which has a function of calculating the amount of oil injected based on the number of revolutions of the rotor and continuously storing the calculated data of the oil injection amount Wherein said digital oil meter injecting gun comprises: 5. The method of claim 4,
The flat casing of the black box is made of stainless steel and is hermetically sealed so as not to open the inside without breakage, and has a rubber band for breaking which crosses the center of the flat casing in the circumferential direction, Wherein the flat casing can be opened and broken by both sides of the flat casing. 6. The method of claim 5,
Wherein the inner surface of the rupture rubber band is formed in a zigzag shape with a half-sliced wave line along the longitudinal direction. The method according to claim 1,
Wherein the controller displays the current oil injection amount and the accumulated oil injection amount, both made by the new actuation of the trigger, together on the display. 8. The method of claim 7,
The injection amount measuring unit may further include a communication interface to transmit data of the current oil injection amount calculated by the controller to an external device so as to be notified that the external device includes a card terminal, Wherein the oil is injected into the first chamber. 9. An oil injection system comprising a digital oil meter injection gun according to any one of claims 1 to 8 and an oil tank for supplying oil to the digital oil meter injection gun.

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