TWI250720B - Strike force control circuit used in dual-coil electric striking device - Google Patents

Abstract

This invention relates to a strike force control circuit used in a dual-coil electric striking device, wherein the electric striking device applies the following action elements: a punch pole inside the coil is attracted by a magnetic field generated while the coil is energized and displaces accordingly, and a resilient member connected to one end of the punch pole is then forced to deform so that there stores an elastic potential energy; and then, while the current supplied to the coil is cut off, the magnetic field of the coil disappears and accordingly the magnetic force acting on the punch pole disappears, meanwhile, the resilient member connected to the punch pole has no more external force and the resilient member is capable of forcing the punch pole by the elastic potential energy to accelerate the punch pole to strike. This invention has a dual-coil configured on the electric striking device and a single-chip control circuit to control the conducting time of the dual-coil so that the punch pole, which is attracted by the coil magnetic force, has various degrees of displacement to generate impact forces of various strengths.

Description

1250720 Case No. 93107386 Issue 5 (Invention) (1) Technical Field The present invention aims to disclose a striking force control circuit for a double coil electric striking device, and more particularly to control a first and a second coil by using a single wafer. Turn on and off to adjust the impact of the punch. [Prior Art] According to the traditional manpower striking method, the electric striking device has the advantages of strong striking force and high striking strength. It has been well received by users from all walks of life and has become an essential tool for many large and small projects. A common electric striking device often only has a single coil, and uses the magnetic force generated by the coil to attract the ram, and the electric current of the single-coil electric striking device must be limited to be turned on during the half cycle of the AC power source. When the on-time exceeds half a cycle, the polarity of the AC power source is reversed, and the magnetic field direction of the coil is reversed, and the magnetic force applied to the ram is cancelled. Thus, the impact force of the ram is greatly reduced, so that the single coil is The electric striking device not only has a weak striking force, but its striking strength is also difficult to control. Therefore, some manufacturers have introduced an electric striking device with a double coil. The attachment is attached to the Taiwan Patent Notice No. 4 6 5 1 7 0. No. 2 coil electric striking machine hitting force control method), which mainly uses a electric striking device to be equipped with a double coil, and controls the first coil on-time by an RC phase shift circuit with a variable resistor. In this way, by adjusting the resistance value of the variable resistor, the first coil on-time can be controlled, and the ram can generate different strike forces. However, such conventional double-coil electric striking devices cannot avoid the following disadvantages: 1. The conventional electric striking device is modified by adjusting the variable resistor.

1250720 _ Case No. 93107386_年月曰 _ _ _, invention description (2) the striking force of the rod, but because the resistance value of the variable resistor and the striking force of the ram is not a linear relationship, and the resistance is too large or too small It will cause the impact force to drop, so it is difficult to take the required resistance value. Therefore, using the variable resistor to adjust the strength of the impact force of the ram is theoretically feasible, but it is quite troublesome in practical application. Thus, not only will manufacturing be caused. The difficulty of the above increases the cost; it also causes the user to use it and is not practical.

2, the conventional electric striking device does not have a safety switch, so if the user accidentally triggers the switch, it is easy to accidentally injure people or objects around, and the electric striking device is very powerful because of the impact force, if it hurts the human body The consequences of the site are unimaginable. 3. The appropriate control device is not provided on the control circuit of the conventional use. Therefore, if the current is too large, the internal components will be damaged and there may be accidents such as fire. Therefore, on the whole, it can be said that it is quite unpractical and needs to be improved. 【content】

The invention relates to a striking force control circuit for an electric striking device with double coils, wherein the operating principle of the electric striking device of the present invention utilizes a coil (ie, an inductor) to generate a magnetic field after being energized, and the punch located in the coil is It will be displaced by magnetic attraction and force the elastic member connected at one end of the punch to deform. Thus, the elastic potential energy can be stored by the deformation of the elastic member. Finally, when the current on the coil is cut off, the magnetic field of the coil does not exist. The magnetic force acting on the ram disappears; at this time, the elastic member connected to the ram is no longer subjected to an external force, so the elastic position of the elastic member can apply force to the ram

Page 6 1250720 _ Case No. 93107386_ Year Month _ Amendment _ V. Invention Description (3), the ram is accelerated and fired; and the present invention is to provide a double coil on the electric striking device, and cooperate with a single chip control circuit By controlling the on-time of the double coils by the control circuit, the rams attracted by the magnetic force of the coil have different degrees of displacement to generate the striking force of different strengths. The following is a summary of the striking force control circuit of the electric striking device with double coils of the present invention, so that the reviewing committee can obtain a further understanding of the present invention:

1. The present invention mainly uses a single chip in a control circuit, and writes a program to control the on-time of the double coil. Therefore, when a different degree of striking force is obtained, it can be directly controlled by a single-chip program, so that the adjustment can be simplified. The step of striking the power can also get a more accurate blow. 2. The invention has a safety switch on the control circuit. When the safety switch and the firing switch are sequentially turned on, the rushing bar will generate a firing, thereby avoiding unnecessary damage caused by the user accidentally touching the firing switch. 3. The present invention is provided with a fuse on the control circuit. When the current is too large, the fuse will open an open circuit, and the excessive current cannot flow into the control circuit to achieve the function of protecting the components in the control circuit. [Embodiment]

The invention relates to a circuit for controlling the striking force of an electric striking device with double coils. The main operating principle is that an elastic member (not shown) is connected to one end of the punch (not shown) when the punch is displaced. The elastic member will be deformed, thereby deforming and storing the elastic potential energy, and finally releasing the elastic potential energy to accelerate the punch and generate a strong striking force; wherein the displacement path of the punch is arranged side by side a first coil and a second coil, the coil generates a magnetic field after being energized, and provides a thrust displacement thrust by a magnetic force (this is a

1250720 _ Case No. 93107386_年月曰 修正 Amendment _ V. Description of the invention (4) The principle of the operation of the conventional electric striking device is not the patent to be applied for in the present invention, and will not be described here. Referring to the first figure, the electronic circuit diagram shown in the first figure is a control circuit diagram of the striking force control circuit of the electric striking device with double coils, wherein the AC voltage source is input by AC 1 and AC 2, and A fuse (1 1 ) is provided at the input end of the AC power source, so that the internal component is damaged when the current is too large; the circuit with rectification and filtering effect is formed by using components such as a resistor, a capacitor and a diode, and the three-terminal stability is matched. The voltage regulator (12) provides the DC voltage required for a single wafer (13), Vcc.

The invention is provided with a safety switch (14) and a firing switch (15). When the safety switch (14) is in an open state, Vcc is electrically connected to the third pin of the single chip (13); and the firing switch (1 5) When turned on, V cc is turned on with the fourth pin of the single chip (1 3 ); when the safety switch (1 4 ) and the firing switch (1 5 ) are sequentially turned on, the single chip (1 3 The trigger signal is outputted by the seventh and sixth pins, and the diode (16) and the diode (17) are sequentially triggered; wherein: when the diode (16) is triggered, the first coil (18) It can be turned on with AC power; when the diode (1 7) is triggered, the second coil (1 9 ) will be turned on with AC power;

The first coil (18) will be turned on first to generate a magnetic field and attract the ram to be displaced in the direction of the second coil (19); and when the second coil (19) is turned on, it will continue to attract the rush The displacement of the rod makes the elastic member of the one end of the punch larger and stores more elastic potential energy. Finally, when the first and second coils (1 8 and 19) are cut off, the magnetic field also disappears. The ram is no longer affected by the magnetic force, and the elastic part connected to one end of the ram will

Page 8 1250720 __________ cable number 93107386__ one - five, invention description (5) release elastic potential energy, the elastic position can be fired in the direction of acceleration; when the front of the front, the safety switch must be restored (1 4 state to Turn off the state, and then press the switch (1 5 ). In this way, the single 16, 1 7 ) sends a trigger signal to prevent the user from being hurt. The size of the impact force of the punch is the size of the shape variable (the larger the shape variable is, the longer the time of the first and second coils is, the longer the time will be, the more the single chip will be determined, and the program will be programmed to control the turn-on time). The desire to 'make the ram to a different degree' can easily achieve the desired easy-to-adjust and accurate electric drive for the user. Will be converted to kinetic energy to accelerate the ram, after the eight shots, 'to make a second shot ^) and the firing switch (1 5) will open the safety switch (1 4 ) and hit the wafer (1 3 ) The diode (the number 'to complete the second shot; after the first shot, the elastic member is more elastic due to the displacement of the punch due to the displacement of the punch), and the punch is displaced. Therefore, the first and second coils are guided to a displacement degree; and the present invention mainly prepares the first and second coils (1, 8 and 1 change the first and second coils when the strike force is turned on, and only the control force is required by the program. 'Therefore, it is advantageous for the manufacturer to make the device to stimulate the consumer's consumption, and the above is only a preferred embodiment for explaining the present invention, and is not intended to limit the invention in any way. Any modification or modification of the present invention made in the spirit of the present invention is still included in the scope of the present invention. In summary, the present invention has a dual, method circuit design, It is an electric blow that fully meets the coils required for industrial development. Controls the striking force is set by the practicality and cost-effectiveness, do 'and disclosed invention also has the structure

Page 9 1250720 _ Case No. 93107386_年月日日__ V. Invention Description (6) There is an unprecedented innovative structure, so its "novelty" should be undoubted, and the invention can be more effective than the conventional structure. The promotion is therefore also "progressive". It fully complies with the requirements of the application requirements for invention patents in China's Patent Law. It is a patent application filed in accordance with the law and is subject to the early review and affirmation.

Page 10 1250720 _ Case No. 93107386 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Understanding 1· 1 1 — — — Fuse 1 2 — — — Two-terminal regulator 1 3 — — — Single chip 1 4 — — — Safety switch 1 5 — — — Fire switch 1 6 — — — Diode 1 7 — — — Diode 1 8 — — First coil 1 9 — — — Second coil diagram Simple description: The first figure is a preferred implementation of the striking force control circuit of the electric striking device with double coils of the present invention. Example control circuit diagram.

Claims (1)

1250720 _ Case No. 93107386_Yearly revision _ Six, application patent scope 1, a double-coil electric striking device striking force control circuit, which is mainly a control circuit with a single chip, and power can generate magnetic force The first coil and the second coil, the control circuit can control the current of the first and second coils to be turned on or off, and cooperate with the control program of the single chip, so that the control circuit can control the conduction time of the first and second coils The length of the first and second coil conduction times is adjusted by the above control circuit to achieve the purpose of adjusting the punch striking force. 2. The electric striking device striking force control circuit with double coils according to claim 1 of the patent application, wherein the control circuit is provided with a safety switch having a function of preventing the user from accidentally touching the firing. Page 12