Electric syringe for dental anesthetic
First Claim
1. An electric syringe for injecting a dental anesthetic by pressing a rubber plug of a cartridge filled with an anesthetic, thereby injecting the anesthetic from a needlepoint of a dental needle connected to the cartridge, the electric syringe comprising:
- a push member configured to press and move the rubber plug of the cartridge;
a drive motor configured to generate a drive force;
a transmission mechanism part configured to transmit the drive force to the push member;
an operation switch having a window hole portion and a sensor of a light reflection type which detects whether or not the window hole portion is closed; and
a control unit configured to control a moving of the push member by controlling the drive motor;
wherein the control unit starts the injection of the anesthetic when the sensor of the operation switch detects that the window hole portion is closed and controls the drive motor to move the push member to linearly increase an injection speed of the anesthetic at a constant, predetermined rate at the beginning of the injection and until reaching a selected injection speed, and then to move the push member to inject the anesthetic at the selected injection speed without further increase.
1 Assignment
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Accused Products
Abstract
An electric syringe according to the invention injects a dental anesthetic by pressing a rubber plug of a cartridge filled with an anesthetic. The electric syringe includes: a push member configured to press and move the rubber plug of the cartridge; a drive motor configured to generate a drive force; a transmission mechanism part configured to transmit the drive force to the push member; and a control unit configured to control a moving of the push member by controlling the drive motor, wherein the control unit controls the drive motor to move the push member to gradually increase an injection speed of the anesthetic in the beginning of the injection and to move the push member to inject the anesthetic in a constant injection speed after a predetermined time has elapsed.
28 Citations
20 Claims
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1. An electric syringe for injecting a dental anesthetic by pressing a rubber plug of a cartridge filled with an anesthetic, thereby injecting the anesthetic from a needlepoint of a dental needle connected to the cartridge, the electric syringe comprising:
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a push member configured to press and move the rubber plug of the cartridge; a drive motor configured to generate a drive force; a transmission mechanism part configured to transmit the drive force to the push member; an operation switch having a window hole portion and a sensor of a light reflection type which detects whether or not the window hole portion is closed; and a control unit configured to control a moving of the push member by controlling the drive motor; wherein the control unit starts the injection of the anesthetic when the sensor of the operation switch detects that the window hole portion is closed and controls the drive motor to move the push member to linearly increase an injection speed of the anesthetic at a constant, predetermined rate at the beginning of the injection and until reaching a selected injection speed, and then to move the push member to inject the anesthetic at the selected injection speed without further increase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An electric syringe for injecting a dental anesthetic by pressing a rubber plug of a cartridge filled with an anesthetic, thereby injecting the anesthetic from a needlepoint of a dental needle connected to the cartridge, the electric syringe comprising:
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a push member configured to press and move the rubber plug of the cartridge; a drive motor configured to generate a drive force; a transmission mechanism part configured to transmit the drive force to the push member; an operation switch having a window hole portion and a sensor of a light reflection type which detects whether or not the window hole portion is closed; a control unit configured to control a moving of the push member by controlling the drive motor, wherein the control unit starts the injection of the anesthetic when the sensor of the operation switch detects that the window hole portion is closed and controls the drive motor to move the push member to linearly increase an injection speed of the anesthetic at a constant, predetermined rate at the beginning of the injection and until reaching a selected injection speed, and then to move the push member to inject the anesthetic at the selected injection speed without further increase; and a sound output unit configured to output a buzzing or melodic sound, wherein the control unit controls the sound output unit to output the sound during the injection of the anesthetic.
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19. An electric syringe for injecting a dental anesthetic by pressing a rubber plug of a cartridge filled with an anesthetic, thereby injecting the anesthetic from a needlepoint of a dental needle connected to the cartridge, the electric syringe comprising:
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a push member configured to press and move the rubber plug of the cartridge; a drive motor configured to generate a drive force; a transmission mechanism part configured to transmit the drive force to the push member; a control unit configured to control a moving of the push member by controlling the drive motor, wherein the control unit controls the drive motor to move the push member to gradually increase an injection speed of the anesthetic in the beginning of the injection and to move the push member to inject the anesthetic in a constant injection speed after a predetermined time has elapsed; and an operation switch having a window hole portion and a sensor of a light reflection type in which detects whether or not the window hole portion is closed, wherein the control unit starts the injection of the anesthetic when the sensor of the operation switch detects that the window hole portion is closed.
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20. An electric syringe for injecting a dental anesthetic by pressing a rubber plug of a cartridge filled with an anesthetic, thereby injecting the anesthetic from a needlepoint of a dental needle connected to the cartridge, the electric syringe comprising:
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a push member configured to press and move the rubber plug of the cartridge; a drive motor configured to generate a drive force; a transmission mechanism part configured to transmit the drive force to the push member, comprising; a lock removing button arranged on a cover case of the electric syringe; and a clutch mechanism portion configured to release the transmission of the drive force when the lock removing button is operated; and a control unit configured to control a moving of the push member by controlling the drive motor, wherein the control unit controls the drive motor to move the push member to gradually increase an injection speed of the anesthetic in the beginning of the injection and to move the push member to inject the anesthetic in a constant injection speed after a predetermined time has elapsed.
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Specification