CN107591268B - Brake structure applied to electric tool switch - Google Patents
Brake structure applied to electric tool switch Download PDFInfo
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- CN107591268B CN107591268B CN201710896048.9A CN201710896048A CN107591268B CN 107591268 B CN107591268 B CN 107591268B CN 201710896048 A CN201710896048 A CN 201710896048A CN 107591268 B CN107591268 B CN 107591268B
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Abstract
The invention discloses a brake structure applied to an electric tool switch, which comprises a shell, wherein a push rod is arranged on the shell, one end of the push rod is the inner end of the push rod, the other end of the push rod is the outer end of the push rod, a main spring is arranged between the inner end of the push rod and the inner wall of the rear side, a connecting lug is arranged on the outer side wall of one end of the push rod positioned in the shell, one end of the connecting lug is fixedly connected with a secondary rod, a ring body is arranged around the outside of the secondary rod, a pressure spring is sleeved on the secondary rod and is abutted against the inner wall of the ring body, a B + terminal and a D terminal are arranged between the ring, when the push rod is not subjected to external force, the conductive connecting body is simultaneously abutted against the B + terminal and the D terminal under the driving of the pressure spring to connect the B + terminal and the D terminal, the B + terminal is electrically connected with the positive connecting terminal of the motor, and the D terminal is electrically connected with the negative connecting terminal of the motor. The inertia of the motor is released rapidly by discharging, so that the motor is stopped rapidly.
Description
Technical Field
The invention relates to an electric switch, in particular to a brake structure applied to an electric tool switch.
Background
An electric tool, especially an electric tool driven by a motor, is usually controlled by a press switch during operation, the motor is usually started by pressing the switch, a release switch closes the motor, the motor rotates with inertia, so that after an operator releases the switch, the motor can continuously operate for a period of time, and the electric tool is still in the operation process within the period of time, so that the risk of safety accidents exists, and damage to processed products can be caused, taking an electric hammer as an example, after the operator releases the switch, the motor continuously operates for a period of time, and within the period of time, the electric hammer still has large vibration, and a hammer head at the front end still has large impact force, at the moment, if the operator touches the electric hammer to other objects, the other objects can be damaged due to the impact force of the hammer head, and if the operator touches a person, the human body can be injured, therefore, there is a need for a brake structure that can quickly stop a motor of an electric power tool.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the brake structure can enable the motor of the electric tool to be rapidly stopped by high-speed operation, greatly reduce the continuous operation time of the motor after the power failure, avoid the electric tool from damaging other objects or people after the switch is released, and improve the use safety of the electric tool.
In order to solve the technical problems, the invention adopts the technical scheme that: a brake structure applied to an electric tool switch comprises a hollow shell, a push rod mounting hole communicated with the inside is formed in a front side plate of the shell, a push rod is mounted in the push rod mounting hole, one end of the push rod is inserted into the shell, the other end of the push rod extends out of the shell, one end, located in the shell, of the push rod is the inner end of the push rod, the other end of the push rod is the outer end of the push rod, the inner end of the push rod is opposite to the inner end of the push rod and is a rear inner wall of the shell, a main spring is arranged between the inner end of the push rod and the rear inner wall, the main spring applies axial force to the outside of the shell to the push rod, a connecting lug is arranged on the outer side wall of one end, located in the shell, of the push rod, one end, far away from the push rod, of the connecting lug is fixedly connected with an auxiliary rod, the utility model discloses a motor, including the compression spring, the compression spring is provided with a B + terminal and a D terminal, the compression spring is provided with a conductive connector towards the one end of push rod outer end with the ring body inner wall counterbalance, the compression spring is fixed between the inner wall of curb plate before ring body and the casing, the ring body is provided with a conductive connector towards the one end of curb plate before the casing, under the condition that the push rod does not receive external force, conductive connector contradicts with B + terminal and D terminal simultaneously under driving about of compression spring, makes B + terminal and D terminal switch-on, B + terminal and electric tool's positive binding post of motor or negative binding post electric connection, D terminal and electric tool's motor negative binding post or positive binding post electric connection.
As a preferable scheme, the outer side wall of one end of the push rod, which is positioned in the shell, is also provided with a pressing block which protrudes outwards, the shell is internally provided with a movable contact spring mounting seat which is opposite to the pressing block, the movable contact spring mounting seat is provided with a movable contact spring, two ends of the movable contact spring are respectively positioned at two sides of the movable contact spring mounting seat and can be used for tilting by the mounting seat as a supporting point, one end of the movable contact spring is opposite to the pressing block, the other end of the movable contact spring is provided with a movable contact, the shell is also internally provided with a fixed contact mounting seat, the fixed contact mounting seat and the pressing block are respectively arranged at two sides of the movable contact spring, the fixed contact mounting seat is opposite to the movable contact, the fixed contact is fixedly arranged on the fixed contact mounting seat, the movable contact is opposite to the fixed contact, one side of the movable contact is provided with a, the spring-driven movable contact is abutted against the fixed contact, a pressed terminal extending towards the direction of the pressing block is arranged at one end, opposite to the pressing block, of the movable contact, when the push rod is not acted by external force, the pressed terminal is abutted against the pressing block, the movable contact is located at one end of the movable contact and is tilted to be separated from the fixed contact, when the push rod is stressed to move towards the inside of the shell, the conductive connector is detached from the B + terminal and the D terminal inevitably before the pressed terminal is detached from the pressing block, the movable contact is electrically connected with the B + terminal, the fixed contact and the D terminal are respectively electrically connected with the positive pole and the negative pole of a power supply, or the movable contact is electrically connected with the D terminal, and the fixed contact and the B + terminal are respectively electrically connected with the positive pole.
As a preferred scheme, a main spring mounting blind hole is axially formed in the inner end of the push rod, one end of the main spring is inserted into the main spring mounting blind hole, a rubber nail opposite to the main spring mounting blind hole is arranged on the inner wall of the rear side of the shell, and the main spring is sleeved on the rubber nail.
As a preferred scheme, the ring body is formed by bending a metal lath, the conductive connecting body is the ring body, the ring body comprises a guide part facing the inner end of the push rod and a contact part facing the front side plate, the width of the guide part is 0.5-1.5 mm larger than the outer diameter of the pressure spring, the length of the guide part is not less than two thirds of the length of the auxiliary rod, the auxiliary rod is arranged in the guide part, the arc-shaped transition at the bending part of the end part of the contact part forms an arc-shaped contact surface, the B + terminal and the D terminal are respectively provided with an inclined surface, the two inclined surfaces are arranged in a splayed shape, and the two inclined surfaces correspond to the two arc-.
As a preferable scheme, the spring positioning column and the fixed contact mounting seat are located on the same side of the movable contact piece and close to one end of the movable contact, and the spring applies a pulling force to the movable contact piece to drive the movable contact to tightly abut against the fixed contact.
As a preferable scheme, the movable contact mounting seat is a plate perpendicular to the push rod, a groove for mounting the movable contact is formed in one end, facing the pressing block, of the mounting seat, the middle of the movable contact is embedded in the groove, and the width of the movable contact positioned on the two sides of the mounting seat is larger than that of the groove.
The invention has the beneficial effects that: through set up the sublance on the push rod, and set up the ring body on the sublance, set up the electrically conductive connector on the ring body, it is relative with the one end of ring body to set up in the casing, and B + terminal and D terminal of alternate segregation, make the push rod under the state that does not receive external force, the electrically conductive connector can put through B + terminal and D terminal, make the positive binding post and the negative binding post of motor meet mutually, after the motor short circuit, the current that produces when the inertial potential energy of motor is through its rotation obtains quick release, thereby reduce the motor rotational speed fast, make the motor stall rapidly.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic structural view of the push rod of FIG. 1;
FIG. 3 is a schematic structural view of the ring body of FIG. 1;
FIG. 4 is a reverse cross-sectional view of FIG. 1;
fig. 5 is a schematic view of the mounting structure of the movable contact in fig. 3.
In fig. 1 to 5: 1. the device comprises a shell, 1-1 parts, a front side plate, 1-2 parts, a rear side inner wall, 2 parts, a push rod mounting hole, 3 parts of a push rod, 3-1 parts, a push rod inner end, 3-2 parts, a push rod outer end, 4 parts, a main spring, 5 parts, a connecting lug, 6 parts, an auxiliary rod, 7 parts, a ring body, 7-1 parts, a guide part, 7-2 parts, a contact part, 7-3 parts, an arc contact surface, 8 parts, a pressure spring, 9 parts, a B + terminal, 10 parts, a D terminal, 11 parts, a conductive connector, 12 parts, a pressing block, 13 parts, a movable contact mounting seat, 14 parts, a movable contact, 15 parts, a movable contact, 16 parts, a fixed contact mounting seat, 17 parts, a fixed contact, 18 parts, a spring positioning column, 19 parts, a spring, 20 parts, a pressure terminal.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings of FIG. 1.
As shown in fig. 1 to 3, a brake structure applied to an electric tool switch comprises a hollow casing 1, a push rod mounting hole 2 communicated with the inside is formed on a front side plate 1-1 of the casing 1, a push rod 3 is mounted in the push rod mounting hole 2, one end of the push rod 3 is inserted into the casing 1, the other end of the push rod extends out of the casing 1, one end of the push rod 3 located in the casing 1 is a push rod inner end 3-1, the other end is a push rod outer end 3-2, a rear side inner wall 1-2 of the casing 1 is opposite to the push rod inner end 3-1, a main spring 4 is arranged between the push rod inner end 3-1 and the rear side inner wall 1-2, the main spring 4 applies an axial force to the push rod 3 towards the outside of the casing 1, a connecting bump 5 is arranged on an outer side wall of one end of the push rod 3 located in the casing 1, one end of the connecting bump 5 far away from the push rod, the auxiliary rod 6 extends towards the outer end 3-2 of the push rod, a long strip-shaped ring body 7 is arranged around the outer portion of the auxiliary rod 6, the auxiliary rod 6 is located inside the ring body 7, the length direction of the ring body 7 is consistent with the extending direction of the auxiliary rod 6, a pressure spring 8 is sleeved at one end, facing the outer end 3-2 of the push rod, of the auxiliary rod 6, one end, facing the outer end 3-2 of the push rod, of the pressure spring 8 abuts against the inner wall of the ring body 7, a B + terminal 9 and a D terminal 10 are fixedly arranged between the ring body 7 and the inner wall of the front side plate 1-1 of the shell 1, a conductive connecting body 11 is arranged at one end, facing the front side plate 1-1 of the shell 1, of the ring body 7, under the condition that the push rod 3 is not subjected to external force, the conductive connecting body 11 abuts against the B + terminal 9 and the D terminal 10 under the driving of the pressure spring 8, so that the B + terminal 9, the D terminal 10 is electrically connected to a negative terminal or a positive terminal of a motor of the electric tool.
Through set up the auxiliary rod 6 on push rod 3, and set up ring body 7 on auxiliary rod 6, set up electrically conductive connector 11 on ring body 7, it is relative with the one end of ring body 7, and B + terminal 9 and D terminal 10 of alternate segregation to set up in casing 1, make the push rod under the state that does not receive external force, electrically conductive connector 11 can put through B + terminal 9 and D terminal 10, make the anodal binding post and the negative pole binding post of motor meet mutually, after the motor short circuit, the current that produces when the inertia potential energy of motor is through its rotation obtains quick release, thereby reduce the motor rotational speed fast, make the motor stall fast.
As shown in fig. 4 and 5, the outer side wall of one end of the push rod 3 located in the housing 1 is further provided with a pressing block 12 protruding outwards, the housing 1 is internally provided with a moving contact mounting base 13 opposite to the pressing block 12, the moving contact mounting base 13 is provided with a moving contact 14, two ends of the moving contact 14 are respectively located at two sides of the moving contact mounting base 13 and can tilt with the mounting base 13 as a supporting point, one end of the moving contact 14 is opposite to the pressing block 12, the other end of the moving contact 14 is provided with a moving contact 15, the housing 1 is further internally provided with a fixed contact mounting base 16, the fixed contact mounting base 16 and the pressing block 12 are respectively located at two sides of the moving contact 14, the fixed contact mounting base 16 is opposite to the moving contact 15, the fixed contact 17 is fixedly arranged on the fixed contact mounting base 16, the moving contact 15 is opposite to the fixed contact 17, one side of the moving contact 14 is provided with a spring positioning column 18, the moving contact 14, the other end of the spring 19 is fixedly connected to a spring positioning column 18, the spring 19 drives the movable contact 15 to abut against a fixed contact 17, one end of the movable contact 14 opposite to the pressing block 12 is provided with a pressed terminal 20 extending towards the pressing block 12, when the push rod 3 is not acted by external force, the pressed terminal 20 abuts against the pressing block 12, the movable contact 14 is positioned at one end of the movable contact 15 and is tilted to be separated from the fixed contact 17, when the push rod 3 is forced to move towards the inside of the shell 1, the conductive connector 11 before the pressed terminal 20 is separated from the pressing block 12 is necessarily separated from the B + terminal 9 and the D terminal 10, the movable contact 15 is electrically connected with the B + terminal 9, the fixed contact 17 is electrically connected with the positive pole and the negative pole of the power supply respectively with the D terminal 10, or the movable contact 15 is electrically connected with the D terminal 10, the fixed contact 17 is electrically connected with the positive pole of the power supply respectively with the B +, And a negative electrode.
When the electric tool runs normally, the movable contact piece 14 is driven by the spring 19 to tightly abut against the fixed contact 17, so that the vibration of the electric tool during working can be resisted, electric arc and carbon deposition generated by the phenomenon of flash-off of the movable contact piece 14 and the fixed contact 17 are prevented, and the normal connection of the movable contact piece 14 and the fixed contact 17 is influenced, and therefore, the service life of the switch can be effectively prolonged.
When the push rod 3 is not acted by external force or the push rod 3 moves towards the outside of the shell 1 in the process of releasing the external force, the pressing block 12 assembly presses down the pressed terminal 20 of the movable contact piece 14, one end of the movable contact 15 of the movable contact piece 14 tilts, the movable contact 15 is separated from the fixed contact 17, the motor of the electric tool is powered off, and therefore the positive pole and the negative pole of the power supply cannot be short-circuited due to the next short circuit of the motor.
The inner end 3-1 of the push rod is axially provided with a main spring installation blind hole 21, one end of the main spring 4 is inserted into the main spring installation blind hole 21 and is radially limited by the main spring installation blind hole 21 to prevent the main spring 4 from bending under a compressed state, a rubber nail 22 opposite to the main spring installation blind hole 21 is arranged on the inner wall 1-2 of the rear side of the shell 1, the main spring 4 is sleeved on the rubber nail 22 and can be used for guiding the compression of the main spring 4, the rubber nail 22 can be inserted into the main spring installation blind hole 21, and a guiding effect is also achieved on the axial movement of the push rod 3, so that the push rod 3 is pressed more stably.
As shown in fig. 3, the ring body 7 is formed by bending a metal plate strip, which is convenient to process and reduces the production cost, and when the motor is short-circuited, a relatively large amount of heat is generated, the metal ring body 7 has a large surface area and can rapidly release the heat, and damage to the switch due to a local high temperature is avoided, so that the conductive connecting body 11, i.e., the ring body 7 itself, the ring body 7 includes a guide portion 7-1 facing the inner end 3-1 of the push rod and a contact portion 7-2 facing the front side plate 1-1, the width of the guide portion 7-1 is 0.5-1.5 mm greater than the outer diameter of the compression spring 8, so that the ring body 7 can have a certain offset, when there is an error between the end of the ring body 7 and the B + terminal and the D terminal, if the ring body 7 does not have an offset, the end of the ring body 7 only contacts one of the, and after the ring body 7 has an offset, the ring body 7 can be driven by the pressure spring 8, when one end of the ring body contacts one of the B + terminal and the D terminal, the ring body 7 can be offset due to unbalanced force, and the end part of the ring body 7 can contact the other of the B + terminal and the D terminal, so that the ring body 7 can be ensured to contact the B + terminal and the D terminal at the same time, and the function of rapidly stopping the motor can be realized.
The length of the guide part 7-1 is not less than two thirds of the length of the auxiliary rod 6, the auxiliary rod 6 is arranged in the guide part 7-1 to meet the guide effect of the auxiliary rod 6 on the ring body 7, the arc-shaped transition at the bending part of the end part of the contact part 7-2 forms an arc-shaped contact surface 7-3, the B + terminal and the D terminal are respectively provided with an inclined surface, the two inclined surfaces are arranged in a splayed shape and correspond to the two arc-shaped contact surfaces 7-3 one by one, the arc-shaped transition at the bending part of the other end part of the ring body 7 forms an arc-shaped contact surface 7-3, and when the ring body 7 deflects, the two arc-shaped contact surfaces 7-3 can still be ensured to be effectively and tightly abutted against the corresponding B + terminal or D terminal.
The spring positioning column 18 and the fixed contact mounting base 16 are located on the same side of the movable contact piece 14 and close to one end of the movable contact 15, and the spring 19 applies a pulling force to the movable contact piece 14 to drive the movable contact 15 to be tightly abutted against the fixed contact 17.
The spring positioning post 18 can also be positioned at the other side of the movable contact 14 relative to the fixed contact mounting seat 16, the spring 19 is a pre-compressed spring, the movable contact 15 is tightly pressed on the fixed contact 17 by the spring 19, when the pressing block 12 presses the pressed terminal 20, the pre-compressed spring 19 is further compressed, and the movable contact 15 is separated from the fixed contact 17.
In the invention, the scheme that the spring positioning column 18 and the fixed contact mounting seat 16 are positioned on the same side of the movable contact 14 is adopted, so that the reasonable layout of the spring 19 in the shell 1 is facilitated, in addition, the spring 19 can be bent due to the compression of the spring 19, but the spring 19 does not bend when the spring 19 is pulled up, and the control of the spring 19 on the movable contact 14 is more stable and reliable.
The movable contact mounting seat 13 is a plate perpendicular to the push rod 3, a groove 23 used for mounting the movable contact 14 is formed in one end, facing the pressing block 12, of the mounting seat 13, the middle of the movable contact 14 is embedded in the groove 23, the width of the movable contact 14 located on two sides of the mounting seat 13 is larger than that of the groove 23, the movable contact 14 is simple in assembly structure, convenient to assemble, stable in limiting effect and flexible in tilting of the movable contact 14, and the movable contact mounting seat is a guarantee for controlling the movable contact 15 and the static contact 17 to be accurately opened and closed.
The working principle of the invention is as follows: as shown in fig. 1 to 4, when the push rod 3 is not acted by an external force, the conductive connecting body 11 is always connected with the B + terminal and the D terminal, so that the motor is always in a short-circuit state, meanwhile, the pressing block 12 presses the pressed terminal 20, so that one end of the movable contact piece 14, which is positioned at the movable contact 15, is tilted, the movable contact 15 is separated from the fixed contact 17, the motor is disconnected from a power supply, and the motor is in a stop state.
When the electric tool needs to be used, the push rod 3 is pressed (namely the push rod 3 is pressed in the shell), the push rod 3 moves to drive the auxiliary rod 6 to move, the auxiliary rod 6 moves to push the ring body 7 to move, the ring body 7 moves to directly cause the conductive connecting body 11 to be separated from the B + terminal and the D terminal, the motor is in an open circuit state, then the push rod 3 is continuously pressed, the pressing block 12 and the pressed terminal 20 slide relatively until the pressing block 12 is separated from the pressed terminal 20, the pressed terminal 20 is separated from the pressing block 12 and is not pressed, the movable contact 14 enables the movable contact 15 to move towards the fixed contact 17 under the action of the pulling force of the spring 19 until the movable contact 15 is tightly abutted against the fixed contact 17, the motor is connected with a power supply, and.
When the motor needs to be stopped, the force for pressing the push rod 3 is cancelled, so that the push rod 3 moves towards the outside of the shell 1 under the elastic potential energy of the main spring 4, in the moving process, the pressing block 12 is firstly contacted with the pressed terminal 20, then the pressed terminal 20 is pressed down in the continuous movement of the pressing block 12, one end of the movable contact 15 tilts and is separated from the fixed contact 17, after the motor loses power, the motor continuously decelerates and rotates due to inertia, but the deceleration and rotation needs a certain time due to larger inertia, and in the process, the motor is in a power generation state, the inertia potential energy of the motor cannot be quickly eliminated due to the fact that the electric energy cannot be released, the push rod 3 continuously moves until the contact part 7-2 of the ring body 7 is contacted with the B + terminal and the D terminal, so that the B + terminal is communicated with the D terminal, namely the motor is short-circuited, and the electric energy generated by the rotation of, the electric energy is converted into heat energy which is released through the metal ring body 7, so that the rotation inertia of the motor is rapidly eliminated, and the motor is rapidly stopped.
The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (10)
1. A brake structure applied to an electric tool switch is characterized by comprising a hollow shell (1), a push rod mounting hole (2) communicated with the inside is formed in a front side plate (1-1) of the shell (1), a push rod (3) is mounted in the push rod mounting hole (2), one end of the push rod (3) is inserted into the shell (1), the other end of the push rod extends out of the shell (1), one end, located in the shell (1), of the push rod (3) is a push rod inner end (3-1), the other end of the push rod is a push rod outer end (3-2), a rear side inner wall (1-2) of the shell (1) is opposite to the push rod inner end (3-1), a main spring (4) is arranged between the push rod inner end (3-1) and the rear side inner wall (1-2), and the main spring (4) applies axial force to the outside the shell (1) to the push rod (3, a connecting lug (5) is arranged on the outer side wall of one end of the push rod (3) positioned in the shell (1), one end, far away from the push rod (3), of the connecting lug (5) is fixedly connected with an auxiliary rod (6) which is arranged in parallel with the push rod (3), the auxiliary rod (6) extends towards the outer end (3-2) of the push rod, a long strip-shaped ring body (7) is arranged around the outside of the auxiliary rod (6), the auxiliary rod (6) is positioned in the ring body (7), the length direction of the ring body (7) is consistent with the extending direction of the auxiliary rod (6), one end, facing the outer end (3-2) of the push rod, of the auxiliary rod (6) is sleeved with a pressure spring (8), one end, facing the outer end (3-2) of the push rod, of the pressure spring (8) is abutted against the inner wall of the ring body (7), a B + terminal (9) and a D terminal (10) are fixedly arranged between the ring body (7, the one end of ring body (7) orientation casing (1) preceding curb plate (1-1) is provided with electrically conductive connector (11), does not receive under the circumstances of external force when push rod (3), electrically conductive connector (11) are contradicted with B + terminal (9) and D terminal (10) simultaneously under the driving of pressure spring (8), make B + terminal (9) and D terminal (10) switch-on, B + terminal (9) and electric tool's positive binding post electric connection of motor, D terminal (10) and electric tool's motor negative binding post electric connection.
2. A brake structure applied to an electric tool switch is characterized by comprising a hollow shell (1), a push rod mounting hole (2) communicated with the inside is formed in a front side plate (1-1) of the shell (1), a push rod (3) is mounted in the push rod mounting hole (2), one end of the push rod (3) is inserted into the shell (1), the other end of the push rod extends out of the shell (1), one end, located in the shell (1), of the push rod (3) is a push rod inner end (3-1), the other end of the push rod is a push rod outer end (3-2), a rear side inner wall (1-2) of the shell (1) is opposite to the push rod inner end (3-1), a main spring (4) is arranged between the push rod inner end (3-1) and the rear side inner wall (1-2), and the main spring (4) applies axial force to the outside the shell (1) to the push rod (3, a connecting lug (5) is arranged on the outer side wall of one end of the push rod (3) positioned in the shell (1), one end, far away from the push rod (3), of the connecting lug (5) is fixedly connected with an auxiliary rod (6) which is arranged in parallel with the push rod (3), the auxiliary rod (6) extends towards the outer end (3-2) of the push rod, a long strip-shaped ring body (7) is arranged around the outside of the auxiliary rod (6), the auxiliary rod (6) is positioned in the ring body (7), the length direction of the ring body (7) is consistent with the extending direction of the auxiliary rod (6), one end, facing the outer end (3-2) of the push rod, of the auxiliary rod (6) is sleeved with a pressure spring (8), one end, facing the outer end (3-2) of the push rod, of the pressure spring (8) is abutted against the inner wall of the ring body (7), a B + terminal (9) and a D terminal (10) are fixedly arranged between the ring body (7, the one end of ring body (7) orientation casing (1) preceding curb plate (1-1) is provided with electrically conductive connector (11), does not receive under the circumstances of external force when push rod (3), electrically conductive connector (11) are contradicted with B + terminal (9) and D terminal (10) simultaneously under the driving of pressure spring (8), make B + terminal (9) and D terminal (10) switch-on, B + terminal (9) and electric tool's motor negative pole binding post electric connection, D terminal (10) and electric tool's motor positive pole binding post electric connection.
3. The brake structure applied to the electric tool switch according to claim 1, wherein the outer side wall of one end of the push rod (3) positioned in the shell (1) is further provided with a pressing block (12) protruding outwards, the shell (1) is internally provided with a movable contact mounting seat (13) opposite to the pressing block (12), the movable contact mounting seat (13) is provided with a movable contact (14), two ends of the movable contact (14) are respectively positioned at two sides of the movable contact mounting seat (13) and can tilt by taking the mounting seat (13) as a fulcrum, one end of the movable contact (14) is opposite to the pressing block (12), the other end of the movable contact (15) is arranged, the shell (1) is further internally provided with a fixed contact mounting seat (16), the fixed contact mounting seat (16) and the pressing block (12) are respectively arranged at two sides of the movable contact (14), and the fixed contact mounting seat (16) is opposite to the movable contact (15), the fixed contact (17) is fixedly arranged on the fixed contact mounting seat (16), the movable contact (15) is opposite to the fixed contact (17), one side of the movable contact (14) is provided with a spring positioning column (18), the movable contact (14) is connected with a spring (19), the other end of the spring (19) is fixedly connected onto the spring positioning column (18), the spring (19) drives the movable contact (15) to be abutted against the fixed contact (17), one end of the movable contact (14) opposite to the pressing block (12) is provided with a pressed terminal (20) extending towards the direction of the pressing block (12), when the push rod (3) is not acted by external force, the pressed terminal (20) is abutted against the pressing block (12), one end of the movable contact (14) located at the movable contact (15) is tilted and separated from the fixed contact (17), when the push rod (3) is stressed to move towards the inside of the shell (1), the conductive connecting body (11) is necessarily separated from the B + terminal (9) and the D terminal (10) before the pressed terminal (20) is separated from the pressing block (12); the movable contact (15) is electrically connected with the B + terminal (9), the fixed contact (17) is electrically connected with the anode of a power supply, and the D terminal (10) is electrically connected with the cathode of the power supply.
4. The brake structure applied to the electric tool switch according to claim 1, wherein the outer side wall of one end of the push rod (3) positioned in the shell (1) is further provided with a pressing block (12) protruding outwards, the shell (1) is internally provided with a movable contact mounting seat (13) opposite to the pressing block (12), the movable contact mounting seat (13) is provided with a movable contact (14), two ends of the movable contact (14) are respectively positioned at two sides of the movable contact mounting seat (13) and can tilt by taking the mounting seat (13) as a fulcrum, one end of the movable contact (14) is opposite to the pressing block (12), the other end of the movable contact (15) is arranged, the shell (1) is further internally provided with a fixed contact mounting seat (16), the fixed contact mounting seat (16) and the pressing block (12) are respectively arranged at two sides of the movable contact (14), and the fixed contact mounting seat (16) is opposite to the movable contact (15), the fixed contact (17) is fixedly arranged on the fixed contact mounting seat (16), the movable contact (15) is opposite to the fixed contact (17), one side of the movable contact (14) is provided with a spring positioning column (18), the movable contact (14) is connected with a spring (19), the other end of the spring (19) is fixedly connected onto the spring positioning column (18), the spring (19) drives the movable contact (15) to be abutted against the fixed contact (17), one end of the movable contact (14) opposite to the pressing block (12) is provided with a pressed terminal (20) extending towards the direction of the pressing block (12), when the push rod (3) is not acted by external force, the pressed terminal (20) is abutted against the pressing block (12), one end of the movable contact (14) located at the movable contact (15) is tilted and separated from the fixed contact (17), when the push rod (3) is stressed to move towards the inside of the shell (1), the conductive connecting body (11) is necessarily separated from the B + terminal (9) and the D terminal (10) before the pressed terminal (20) is separated from the pressing block (12); the movable contact (15) is electrically connected with the D terminal (10), the fixed contact (17) is electrically connected with the negative pole of the power supply, and the B + terminal (9) is electrically connected with the positive pole of the power supply.
5. The brake structure applied to the electric tool switch according to claim 2, wherein the outer side wall of one end of the push rod (3) positioned in the shell (1) is further provided with a pressing block (12) protruding outwards, the shell (1) is internally provided with a movable contact mounting seat (13) opposite to the pressing block (12), the movable contact mounting seat (13) is provided with a movable contact (14), two ends of the movable contact (14) are respectively positioned at two sides of the movable contact mounting seat (13) and can tilt by taking the mounting seat (13) as a fulcrum, one end of the movable contact (14) is opposite to the pressing block (12), the other end of the movable contact (15) is arranged, the shell (1) is further internally provided with a fixed contact mounting seat (16), the fixed contact mounting seat (16) and the pressing block (12) are respectively arranged at two sides of the movable contact (14), and the fixed contact mounting seat (16) is opposite to the movable contact (15), the fixed contact (17) is fixedly arranged on the fixed contact mounting seat (16), the movable contact (15) is opposite to the fixed contact (17), one side of the movable contact (14) is provided with a spring positioning column (18), the movable contact (14) is connected with a spring (19), the other end of the spring (19) is fixedly connected onto the spring positioning column (18), the spring (19) drives the movable contact (15) to be abutted against the fixed contact (17), one end of the movable contact (14) opposite to the pressing block (12) is provided with a pressed terminal (20) extending towards the direction of the pressing block (12), when the push rod (3) is not acted by external force, the pressed terminal (20) is abutted against the pressing block (12), one end of the movable contact (14) located at the movable contact (15) is tilted and separated from the fixed contact (17), when the push rod (3) is stressed to move towards the inside of the shell (1), the conductive connecting body (11) is necessarily separated from the B + terminal (9) and the D terminal (10) before the pressed terminal (20) is separated from the pressing block (12); the movable contact (15) is electrically connected with the D terminal (10), the fixed contact (17) is electrically connected with the anode of a power supply, and the B + terminal (9) is electrically connected with the cathode of the power supply.
6. The brake structure applied to the electric tool switch according to claim 2, wherein the outer side wall of one end of the push rod (3) positioned in the shell (1) is further provided with a pressing block (12) protruding outwards, the shell (1) is internally provided with a movable contact mounting seat (13) opposite to the pressing block (12), the movable contact mounting seat (13) is provided with a movable contact (14), two ends of the movable contact (14) are respectively positioned at two sides of the movable contact mounting seat (13) and can tilt by taking the mounting seat (13) as a fulcrum, one end of the movable contact (14) is opposite to the pressing block (12), the other end of the movable contact (15) is arranged, the shell (1) is further internally provided with a fixed contact mounting seat (16), the fixed contact mounting seat (16) and the pressing block (12) are respectively arranged at two sides of the movable contact (14), and the fixed contact mounting seat (16) is opposite to the movable contact (15), the fixed contact (17) is fixedly arranged on the fixed contact mounting seat (16), the movable contact (15) is opposite to the fixed contact (17), one side of the movable contact (14) is provided with a spring positioning column (18), the movable contact (14) is connected with a spring (19), the other end of the spring (19) is fixedly connected onto the spring positioning column (18), the spring (19) drives the movable contact (15) to be abutted against the fixed contact (17), one end of the movable contact (14) opposite to the pressing block (12) is provided with a pressed terminal (20) extending towards the direction of the pressing block (12), when the push rod (3) is not acted by external force, the pressed terminal (20) is abutted against the pressing block (12), one end of the movable contact (14) located at the movable contact (15) is tilted and separated from the fixed contact (17), when the push rod (3) is stressed to move towards the inside of the shell (1), the conductive connecting body (11) is necessarily separated from the B + terminal (9) and the D terminal (10) before the pressed terminal (20) is separated from the pressing block (12); the movable contact (15) is electrically connected with the B + terminal (9), the fixed contact (17) is electrically connected with the negative pole of the power supply, and the D terminal (10) is electrically connected with the positive pole of the power supply.
7. The brake structure applied to the electric tool switch as claimed in claim 1 or 2, wherein the inner end (3-1) of the push rod is axially provided with a main spring mounting blind hole (21), one end of the main spring (4) is inserted into the main spring mounting blind hole (21), the rear inner wall (1-2) of the housing (1) is provided with a rubber nail (22) opposite to the main spring mounting blind hole (21), and the main spring (4) is sleeved on the rubber nail (22).
8. The brake structure applied to the electric tool switch, according to claim 1 or 2, wherein the ring body (7) is formed by bending a metal plate strip, the conductive connecting body (11) is the ring body (7), the ring body (7) comprises a guide part (7-1) facing the inner end (3-1) of the push rod and a contact part (7-2) facing the front side plate (1-1), the width of the guide part (7-1) is 0.5-1.5 mm larger than the outer diameter of the compression spring (8), the length of the guide part is not less than two thirds of the length of the secondary rod (6), the secondary rod (6) is arranged in the guide part (7-1), the arc-shaped transition at the bending part of the end part of the contact part (7-2) forms an arc-shaped contact surface (7-3), the B + terminal and the D terminal are respectively provided with an inclined surface, the two inclined planes are arranged in a splayed shape and correspond to the two arc-shaped contact surfaces (7-3) one by one.
9. The brake structure applied to the electric tool switch as claimed in any one of claims 3 to 6, wherein the spring positioning post (18) and the fixed contact mounting seat (16) are located on the same side of the movable contact (14) and close to one end of the movable contact (15), and the spring (19) exerts a pulling force on the movable contact (14) to drive the movable contact (15) to tightly abut against the fixed contact (17).
10. The brake structure applied to the electric tool switch as claimed in any one of claims 3 to 6, wherein the movable contact mounting seat (13) is a plate arranged perpendicular to the push rod (3), a groove (23) for mounting the movable contact (14) is arranged at one end of the mounting seat (13) facing the pressing block (12), the middle part of the movable contact (14) is embedded in the groove (23), and the width of the movable contact (14) at two sides of the mounting seat (13) is greater than that of the groove (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896048.9A CN107591268B (en) | 2017-09-28 | 2017-09-28 | Brake structure applied to electric tool switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896048.9A CN107591268B (en) | 2017-09-28 | 2017-09-28 | Brake structure applied to electric tool switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107591268A CN107591268A (en) | 2018-01-16 |
| CN107591268B true CN107591268B (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710896048.9A Active CN107591268B (en) | 2017-09-28 | 2017-09-28 | Brake structure applied to electric tool switch |
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| Country | Link |
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| CN (1) | CN107591268B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06223674A (en) * | 1993-01-27 | 1994-08-12 | Omron Corp | Trigger switch |
| CN201936791U (en) * | 2011-03-11 | 2011-08-17 | 乐清市杰拉华电器有限公司 | DC speed regulation switch |
| CN102568896A (en) * | 2011-12-05 | 2012-07-11 | 张家港华捷电子有限公司 | Speed control switch |
| CN103198937A (en) * | 2013-03-08 | 2013-07-10 | 上海拜骋电器有限公司 | Linkage combined brake structure of switch, switch and electric tool |
| CN104282456A (en) * | 2014-09-16 | 2015-01-14 | 张家港华捷电子有限公司 | Switch in electric tool |
| CN207338196U (en) * | 2017-09-28 | 2018-05-08 | 苏州华之杰电讯股份有限公司 | A kind of brake structure being applied in electric tool switch |
-
2017
- 2017-09-28 CN CN201710896048.9A patent/CN107591268B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06223674A (en) * | 1993-01-27 | 1994-08-12 | Omron Corp | Trigger switch |
| CN201936791U (en) * | 2011-03-11 | 2011-08-17 | 乐清市杰拉华电器有限公司 | DC speed regulation switch |
| CN102568896A (en) * | 2011-12-05 | 2012-07-11 | 张家港华捷电子有限公司 | Speed control switch |
| CN103198937A (en) * | 2013-03-08 | 2013-07-10 | 上海拜骋电器有限公司 | Linkage combined brake structure of switch, switch and electric tool |
| CN104282456A (en) * | 2014-09-16 | 2015-01-14 | 张家港华捷电子有限公司 | Switch in electric tool |
| CN207338196U (en) * | 2017-09-28 | 2018-05-08 | 苏州华之杰电讯股份有限公司 | A kind of brake structure being applied in electric tool switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107591268A (en) | 2018-01-16 |
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