A DC speed regulating switch

Abstract

The present invention provides a DC speed regulating switch, comprising: a button, having a plurality of blocking parts, wherein the two ends in the length direction are respectively a first blocking part and a second blocking part; a locking assembly, movably mounted on a housing, and corresponding to the blocking part, a plurality of blocking blocks corresponding to the blocking part are provided. When the gear is locked, since both ends of the button are blocked by the blocking blocks, no matter where the user presses the button, the button will not drive the push rod downward, thereby avoiding misoperation and having higher safety.

Description

Technical Field

[0001] The invention relates to the technical field of speed regulating switches, and in particular to a direct current speed regulating switch. Background Art

[0002] DC speed control switches are widely used in the field of handheld power tools, such as electric drills, electric grinders, electric wrenches and electric screwdrivers. DC speed control switches mainly include a contact mechanism, a button push rod mechanism for controlling the on and off of the contact mechanism, and a reversing mechanism for controlling the reversing of the motor.

[0003] Chinese patent document CN208315428U discloses a speed regulating switch, such as Fig. 9 As shown, the reversing mechanism includes a rotating shaft 05, a reversing rod 01 and a fixing member 02 respectively arranged on both sides of the rotating shaft, the fixing member 02 can rotate with the reversing rod 01, the reversing rod 01 and the fixing member 02 are respectively provided with a first blocking block and a second blocking block, the button 03 has a first blocking bar and a second blocking bar, and the reversing mechanism has three gears: forward, reverse and locked. When in the locked gear, the first blocking block and the second blocking block are respectively located directly below the first blocking bar and the second blocking bar, thereby preventing the button 03 from moving downward, and the motor will not be started, thereby avoiding misoperation. However, since the first blocking block and the second blocking block are both located on the same side of the push rod 04, only the left side and the middle part of the button 03 are blocked. In actual use, if the user presses the right side of the button hard, the right side of the button will still tilt downward, and then the push rod 04 drives the contact mechanism to be connected, causing misoperation and making it unsafe to use. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the button of the DC speed regulating switch will still be driven when the gear is locked, causing misoperation, thereby providing a DC speed regulating switch with high safety performance in which the button will not be driven when the gear is locked.

[0005] To this end, the present invention provides a DC speed regulating switch, including a button and a locking assembly, the button having multiple blocking parts, wherein the two ends in the length direction are respectively a first blocking part and a second blocking part; the locking assembly is movably mounted on the shell, and the corresponding blocking parts are provided with multiple blocks corresponding to them.

[0006] The locking assembly comprises a reversing structure and a rotating member which are arranged in linkage. The reversing structure and the rotating member are respectively provided with a first stopper and a second stopper which can cooperate with the first stopper and the second stopper to block.

[0007] The second stopper and the reversing structure are arranged on two sides of the push rod, and the second stopper is located at the lower side of the second blocking portion.

[0008] The rotating member includes a rotating part, a second stopper and a first matching block. The rotating part is sleeved on the push rod and can rotate around the push rod. The second stopper and the first matching block are arranged on the rotating part. The first matching block is connected to the reversing structure to drive the rotating part to rotate.

[0009] It also includes a positioning structure suitable for limiting the axial position of the rotating part on the push rod, the positioning structure includes an arc-shaped matching block and a positioning block, the arc-shaped matching block is arranged on the top of the shell, the cross-section of the arc-shaped matching block is an inverted L-shape, and the inverted L-shaped arc-shaped matching block and the top panel of the shell are combined to form a positioning groove; the positioning block is arranged at the bottom of the second stopper and is adaptively connected to the positioning groove.

[0010] The reversing structure includes a reversing member and a transmission member, wherein the reversing member has a first rotating shaft, and a reversing rod and a driving rod respectively arranged at two ends of the first rotating shaft, and the first stopper is arranged on the reversing rod; the transmission member connects the driving rod and the first matching block to transmit the rotation of the reversing member to the rotating member.

[0011] The top of the transmission member is rotatably mounted on the mounting column at the top of the shell through a second rotating shaft, and a first open groove is provided at the bottom for the first matching block to be inserted, and the first driving arms on both sides of the first opening groove are abutted against the first matching block to drive the first matching block to rotate, and the transmission member is connected to the driving rod through a matching structure.

[0012] The mating structure includes a second mating block and a second opening groove, the second mating block is arranged on the side of the transmission member facing the driving rod; the second opening groove is arranged on the driving rod and is suitable for the second mating block to be inserted, and the second driving arms on both sides of the second opening groove are against the second mating block to drive the transmission member to rotate around the second rotating shaft.

[0013] The second rotating shaft is arranged perpendicularly to the mounting column, and a limit block is provided at its end away from the mounting column to cooperate with the transmission member to block the second rotating shaft. The transmission member is formed with a first through hole and a second through hole that are interconnected. The diameter of the second through hole is larger than the maximum diameter of the limit block, and the second rotating shaft is adapted to be clamped with the inner wall of the first through hole.

[0014] The button is slidably connected to the housing via a guide rail structure, wherein the guide rail structure comprises a guide rail disposed on one of the button and the mounting column, and a slider disposed on the other of the button and the mounting column and slidably connected to the guide rail.

[0015] The technical solution of the present invention has the following advantages:

[0016] 1. The DC speed regulating switch provided by the present invention has a first blocking portion and a second blocking portion at both ends of the button in the length direction, the locking assembly is movably mounted on the housing, and a plurality of blocking blocks corresponding to the blocking portion are provided. When the gear is locked, since both ends of the button are blocked by the blocking blocks, no matter where the user presses the button, the button will not drive the push rod downward, thereby avoiding misoperation and providing higher safety.

[0017] 2. The DC speed regulating switch provided by the present invention has a locking assembly including a reversing structure and a rotating member which are arranged in linkage, and the reversing structure and the rotating member are respectively provided with a first stopper and a second stopper which can cooperate with the first blocking part and the second blocking part to block. Since the rotating member moves with the reversing structure, it is only necessary to drive the reversing structure, which is easier for the user to operate.

[0018] 3. The DC speed regulating switch provided by the present invention comprises a rotating part, which is sleeved on the push rod and can rotate around the push rod; a second stopper and a first matching block, which are arranged on the rotating part, and the first matching block is connected to the reversing structure to drive the rotating part to rotate. The inventor cleverly transmits the action of the reversing structure on one side of the push rod to the second stopper on the other side of the push rod through the rotating part sleeved on the push rod, thereby realizing the linkage between the reversing structure and the second stopper, and the rotating part has the advantage of simple structure.

[0019] 4. The DC speed regulating switch provided by the present invention has a positioning structure comprising: an arc-shaped matching block, which is arranged at the top of the housing, and the cross section of the arc-shaped matching block is an inverted L-shaped, and the inverted L-shaped arc-shaped matching block and the top panel of the housing are enclosed to form a positioning groove; a positioning block, which is arranged at the bottom of the second stopper and is adapted to be connected with the positioning groove. The positioning block and the positioning groove that cooperate with each other have the advantage of a simple structure.

[0020] 5. The DC speed regulating switch provided by the present invention has a reversing structure including a reversing member and a transmission member. The reversing member has a first rotating shaft, and a reversing rod and a driving rod respectively arranged at both ends of the first rotating shaft. The transmission member connects the driving rod and the first matching block to transmit the rotation of the reversing member to the rotating member. When the reversing rod is manually driven to rotate to the locking position, the driving rod rotates with the reversing rod, and the second driving arm of the driving rod abuts against the second matching block of the transmission member, thereby driving the transmission member to rotate around the second rotating shaft at the top thereof. At this time, the first driving arm at the bottom of the transmission member abuts against the first matching block of the rotating member, driving the rotating member to rotate around the push rod, thereby realizing the linkage between the reversing member and the rotating member. The reversing member and the transmission member have the advantage of simple structure.

[0021] 6. In the DC speed regulating switch provided by the present invention, the second rotating shaft is vertically arranged with the mounting column, and the end thereof away from the mounting column is provided with a stop block cooperating with the transmission member to block, and the transmission member is formed with a first through hole and a second through hole which are interconnected, and the diameter of the second through hole is larger than the maximum diameter of the stop block, and the second rotating shaft is adapted to be engaged with the inner wall of the first through hole. During installation, the installer first aligns the second through hole of the transmission member with the second rotating shaft and then presses the transmission member downward along the side of the mounting column, and the second rotating shaft will be engaged with the first through hole, so that the installation is quick and convenient, and the assembly efficiency is improved.

[0022] 7. In the DC speed regulating switch provided by the present invention, the button is slidably connected to the housing through a guide rail structure, and the guide rail structure includes a guide rail provided on one of the button and the mounting column, and a slider provided on the other of the button and the mounting column and slidably connected to the guide rail. By providing the guide rail structure, it is ensured that the push rod can reciprocate along a straight line, avoiding wear between the push rod and the inner wall of the housing, and extending the service life of the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of a DC speed regulating switch of the present invention;

[0025] Figure 2 A three-dimensional image of a button;

[0026] Figure 3 for Figure 1 The three-dimensional image after removing the button;

[0027] Figure 4 for Figure 3 Schematic diagram of the decomposition structure;

[0028] Figure 5 for Figure 3 A three-dimensional diagram after removing part of the shell;

[0029] Figure 6 is a three-dimensional diagram of a commutating member;

[0030] Figure 7 is a three-dimensional diagram of a transmission member;

[0031] Figure 8 for Figure 3 The three-dimensional image after removing the commutation structure.

[0032] Fig. 9 It is a three-dimensional diagram of a DC speed regulating switch in the prior art.

[0033] Description of reference numerals: 01, reversing rod; 02, fixing member; 03, button; 04, push rod; 05, rotating shaft;

[0034] 1. Button; 11. First blocking portion; 12. Second blocking portion; 13. Slider; 2. Rotating member; 20. Rotating portion; 21. First matching block; 22. Second blocking block; 23. Positioning block; 3. Housing; 4. Push rod; 5. Arc-shaped matching block; 51. Positioning groove; 6. Reversing member; 61. First rotating shaft; 62. Reversing rod; 63. Driving rod; 64. First blocking block; 65. Second opening groove; 66. Second driving arm; 7. Transmission member; 71. First opening groove; 72. First driving arm; 73. Second matching block; 74. First through hole; 75. Second through hole; 8. Mounting column; 81. Second rotating shaft; 82. Limiting block; 83. Guide rail. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Example

[0040] This embodiment provides a DC speed regulating switch, such as Figure 1 and 2 As shown, it includes a housing 3, a button 1 and a locking assembly.

[0041] The top surface of the housing 3 is provided with a mounting column 8, such as Figure 8 As shown, the mounting post 8 is slidably connected to the button 1 via a guide rail structure, and the guide rail structure includes a guide rail 83 provided on the mounting post 8 and a slider 13 provided on the button 1 and slidably connected to the guide rail 83 .

[0042] like Figure 2 As shown, a first blocking portion 11 and a second blocking portion 12 are respectively disposed at two ends of the button 1 in the length direction.

[0043] The locking assembly includes a reversing structure and a rotating member 2 which are arranged in linkage. The reversing structure and the rotating member 2 are respectively provided with a first stopper 64 and a second stopper 22 which can cooperate with the first blocking portion 11 and the second blocking portion 12 to block.

[0044] The rotating member 2 includes a rotating portion 20, a second stopper 22 and a second matching block 73. Figure 3 and 4 As shown, the rotating part 20 is sleeved on the push rod 4 and can rotate around the push rod 4; the second stopper 22 and the first matching block 21 are arranged on the rotating part 20, the first matching block 21 is connected to the reversing structure to drive the rotating part 20 to rotate, the second stopper 22 and the reversing structure are arranged on both sides of the push rod 4, and the second stopper 22 is located at the lower side of the second blocking part 12. When the gear is locked, the second stopper 22 is arranged opposite to the second blocking part 12. The housing 3 is provided with a positioning structure suitable for limiting the axial position of the rotating member 2 on the push rod 4, and the positioning structure includes: an arc-shaped matching block 5, which is arranged on the top of the housing 3, and the cross section of the arc-shaped matching block 5 is an inverted L-shaped, and the inverted L-shaped arc-shaped matching block 5 and the top panel of the housing 3 are enclosed to form a positioning groove 51; a positioning block 23 is arranged at the bottom of the second stopper 22, and is adaptively connected to the positioning groove 51.

[0045] The reversing structure includes a reversing member 6 and a transmission member 7 .

[0046] like Figure 6 As shown, the reversing member 6 has a first rotating shaft 61 , and a reversing rod 62 and a driving rod 63 respectively disposed at two ends of the first rotating shaft 61 . The first stopper 64 is disposed on the reversing rod 62 and can cooperate with the first blocking portion 11 to block.

[0047] The transmission member 7 connects the driving rod 63 and the first matching block 21 to transmit the rotation of the reversing member 6 to the rotating member 2. Figure 3-7 As shown, the top of the transmission member 7 is rotatably mounted on the mounting column 8 at the top of the housing 3 through the second rotating shaft 81, and the bottom is provided with a first opening slot 71 for the first matching block 21 to be inserted, and the first driving arms 72 on both sides of the first opening slot 71 abut against the first matching block 21 to drive the first matching block 21 to rotate, and the transmission member 7 is connected to the driving rod 63 through a matching structure. The matching structure includes: a second matching block 73, which is arranged on the side of the transmission member 7 facing the driving rod 63; a second opening slot 65, which is arranged on the driving rod 63 and is suitable for the second matching block 73 to be inserted, and the second driving arms 66 on both sides of the second opening slot 65 abut against the second matching block 73 to drive the transmission member 7 to rotate around the second rotating shaft 81. The second rotating shaft 81 is integrally formed on the side of the mounting column 8 and is arranged perpendicular to the side thereof. The end of the second rotating shaft 81 away from the mounting column 8 is provided with a limit block 82 that cooperates with the transmission member 7 to block. The transmission member 7 is formed with a first through hole 74 and a second through hole 75 that are interconnected. The diameter of the second through hole 75 is larger than the maximum diameter of the limit block 82. The second rotating shaft 81 is adapted to be snap-fitted to the inner wall of the first through hole 74.

[0048] As a convertible implementation, the number of the blocking parts and the blocking blocks may be 3, 4, 5 or more, and those skilled in the art may flexibly select according to actual needs.

[0049] As a convertible implementation, the guide rail structure includes a guide rail arranged on the button 1, and a slider arranged on the mounting column 8 and slidably connected to the guide rail.

[0050] In the DC speed regulating switch of the present invention, the button 1 has a plurality of blocking parts, wherein the two ends in the length direction are respectively a first blocking part 11 and a second blocking part 12; the locking assembly is movably mounted on the housing 3, and a plurality of blocks corresponding to the blocking parts are provided. When the gear is locked, since both ends of the button 1 are blocked, no matter where the user presses the button, the button will not drive the push rod downward, thereby avoiding misoperation and providing higher safety.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A DC speed regulating switch, characterized in that: include: The button (1) has a plurality of blocking parts, wherein the two ends in the length direction are respectively a first blocking part (11) and a second blocking part (12); A locking assembly is movably mounted on the housing (3), and is provided with a plurality of stoppers corresponding to the blocking portion; The locking assembly comprises a reversing structure and a rotating member (2) which are arranged in linkage, wherein the reversing structure and the rotating member (2) are respectively provided with a first stopper (64) and a second stopper (22) which can cooperate with the first blocking portion (11) and the second blocking portion (12) to block; The rotating member (2) comprises: a rotating portion (20) which is sleeved on the push rod (4) and can rotate around the push rod (4); the second stopper (22) and the first matching block (21) which are arranged on the rotating portion (20); the first matching block (21) is connected to the reversing structure to drive the rotating portion (20) to rotate; It also includes a positioning structure suitable for limiting the axial position of the rotating member (2) on the push rod (4); The reversing structure comprises: a reversing member (6) having a first rotating shaft (61), and a reversing rod (62) and a driving rod (63) respectively arranged at two ends of the first rotating shaft (61), wherein the first stopper (64) is arranged on the reversing rod (62); a transmission member (7) connecting the driving rod (63) and the first matching block (21) so as to transmit the rotation of the reversing member (6) to the rotating member (2); The top of the transmission member (7) is rotatably mounted on the mounting column (8) at the top of the housing (3) via a second rotating shaft (81), and the bottom is provided with a first opening groove (71) for the first matching block (21) to be inserted, and first driving arms (72) on both sides of the first opening groove (71) abut against the first matching block (21) to drive the first matching block (21) to rotate, and the transmission member (7) is connected to the driving rod (63) via a matching structure.

2. The DC speed regulating switch according to claim 1, characterized in that: The second stopper (22) and the reversing structure are arranged on both sides of the push rod (4), and the second stopper (22) is located at the lower side of the second blocking portion (12).

3. The DC speed regulating switch according to claim 1, characterized in that: The positioning structure comprises: An arc-shaped matching block (5) is arranged on the top of the shell (3); the cross section of the arc-shaped matching block (5) is an inverted L-shape; the inverted L-shaped arc-shaped matching block (5) and the top panel of the shell (3) are combined to form a positioning groove (51); A positioning block (23) is arranged at the bottom of the second stopper (22) and is adaptively connected to the positioning groove (51).

4. The DC speed regulating switch according to claim 1, characterized in that: The matching structure comprises: A second matching block (73) is arranged on a side of the transmission member (7) facing the driving rod (63); The second opening groove (65) is provided on the driving rod (63) and is suitable for the second matching block (73) to be inserted. The second driving arms (66) on both sides of the second opening groove (65) abut against the second matching block (73) to drive the transmission member (7) to rotate around the second rotating shaft (81).

5. The DC speed regulating switch according to claim 1 or 4, characterized in that: The second rotating shaft (81) is arranged perpendicularly to the mounting column (8), and a stop block (82) is provided at the end thereof away from the mounting column (8) for cooperating with the transmission member (7) to block the second rotating shaft (81). The transmission member (7) is formed with a first through hole (74) and a second through hole (75) which are interconnected, and the diameter of the second through hole (75) is larger than the maximum diameter of the stop block (82). The second rotating shaft (81) is adapted to be snap-fitted to the inner wall of the first through hole (74).

6. The DC speed regulating switch according to claim 5, characterized in that: The button (1) is slidably connected to the housing (3) via a guide rail structure, wherein the guide rail structure comprises a guide rail (83) provided on one of the button (1) and the mounting column (8), and a slider (13) provided on the other of the button (1) and the mounting column (8) and slidably connected to the guide rail (83).

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