A blowing and suction fan

Abstract

The present invention discloses a blower and suction fan, which belongs to the technical field of blower and suction fan, and solves the problems of low safety and inconvenient operation of existing blower and suction fan. The blower and suction fan includes a shell, accessories, a fan and an interlocking mechanism. By setting a micro switch in series with a start switch, when a grille or a suction pipe is not installed, the micro switch cannot be started, thereby improving the safety performance of the blower and suction fan, and two micro switches are set in parallel to prevent the whole from being unable to operate when a micro switch is damaged. At the same time, one end of the grille is rotatably connected to the shell. When the grille is disassembled, it can be rotated 180 degrees, and the loss of the grille can be prevented. At the same time, an interlocking mechanism is set to lock the grille or the suction pipe, and a release button is set on the upper side of the shell. The release button can be driven to move the movable cam from the locked position to the unlocked position by translation, which is more in line with the operator's operating habit of the release button.

Description

Technical Field

[0001] The present invention relates to the technical field of blowing and suction fans, in particular to a blowing and suction fan. Background Art

[0002] Chinese patent 201310054256.6 discloses a blower vacuum device that protects an electrical switch from interference by providing a baffle on a movable cam, allowing it to move between a blocking position and an unblocking position, and prevents objects from activating the switch when no accessories are installed on the blower vacuum housing. In addition, the baffle not only provides a physical barrier to prevent accidental activation of the switch, but also prevents the user from being able to view the switch or the mechanism used to activate the switch. This prevents the user from knowing the switch and avoids intentional activation of the switch. In this way, the blower vacuum fan cannot be operated when a user or other objects are nearby. At the same time, an accessory release button is also integrated into the movable cam, through which the grille or vacuum tube is released.

[0003] This means that the operator must release the accessory by rotating the release button, and the release button needs to be set on the side of the movable cam, which is inconvenient to operate and does not conform to existing operating habits. When releasing, both hands are required to operate at the same time to release it better. When installing the accessory, the movable cam must be squeezed out of the blocking position using the engageable lug before the starting protrusion can be inserted into the receiving slot. It is also difficult to insert the starting protrusion into the receiving slot appropriately. If it is too early, it will be blocked by the baffle and cannot be inserted. If it is too late, the surface of the movable cam will not be squeezed by the engageable lug and will return to its position, and it cannot be inserted. After the grille is disassembled, it is easy to lose due to its small size. Summary of the Invention

[0004] The present invention is made in consideration of the above-mentioned problems, and the purpose of the invention is to provide a blowing and suction fan that is easy to operate, has a grille that is not easily lost, and conforms to operating habits.

[0005] To achieve the above object, the present invention provides a blowing and suction fan, comprising:

[0006] a housing, wherein a motor and a first switch are disposed in the housing, and the first switch controls the start of the motor;

[0007] a fan, the fan being disposed in the housing and driven by the motor;

[0008] an accessory, the accessory being releasably attached to the housing, the accessory covering the fan, the accessory being provided with an activation protrusion for activating the first switch;

[0009] an interlocking mechanism for connecting the accessory to the housing, the interlocking mechanism comprising a movable cam, the movable cam moving between a locking position and an unlocking position to lock or unlock the accessory;

[0010] A release button is provided on the housing, and the release button drives the movable cam to rotate by translation, thereby controlling the movable cam to move from a locked position to an unlocked position.

[0011] According to the above-mentioned blower-suction fan, the accessory is a grille or a suction pipe, and the suction pipe is further provided with engageable lugs.

[0012] According to the above-mentioned blower-suction fan, the housing is provided with a receiving slot for accommodating the starting protrusion and the engageable lug.

[0013] According to the above-mentioned blower-suction fan, one end of the grille can be rotatably connected to the housing, and the other end can be clamped in the receiving slot through the starting protrusion.

[0014] The above-mentioned blower-suction fan further includes a start switch, which is arranged on the outside of the shell and is connected in series with the first switch.

[0015] According to the above-mentioned blower-suction fan, a first limiting spring is provided on the movable cam, and the movable cam is biased toward the locking position by the first limiting spring.

[0016] According to the above-mentioned blower-suction fan, the movable cam is provided with an inclined cam surface, and when the movable cam is located at the locking position, the inclined cam surface is arranged above the receiving slot.

[0017] According to the above-mentioned blower-suction fan, an extrusion strip is provided under the release button, an arc-shaped protrusion is provided on one side of the movable cam, one end of the extrusion strip is connected to the bottom of the release button, and the other end abuts against the inclined edge of the arc-shaped protrusion.

[0018] According to the above-mentioned blowing and suction blower, it is characterized in that the first switch is configured as a micro switch, two micro switches are configured, and the two micro switches are configured in parallel.

[0019] According to the above-mentioned blower-suction fan, it further includes a pivoting starting element. When the starting protrusion is connected to the pivoting starting element, two ends of the pivoting starting element are adjacent to the two micro switches.

[0020] The present invention has the following beneficial effects:

[0021] 1. The starting protrusion can be directly pressed against the inclined cam surface to be inserted into the receiving slot, thereby activating the micro switch, which is easy to operate.

[0022] 2. The release button can push the movable cam from the locked position to the unlocked position by moving it horizontally, which is more in line with the public's operating habits and more convenient to operate.

[0023] 3. One end of the grille can be rotatably connected to the outer shell. When you need to install the suction pipe at the air inlet, just rotate the grille 180° to prevent the grille from being lost.

[0024] 4. There are two micro switches, and the two micro switches are set in parallel. When one of them is damaged, the other can still play the role of a series starting switch, which can avoid the situation where one micro switch cannot work due to damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the grid structure of the first embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the exploded structure of the interlocking mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the release button operation of the present invention;

[0029] Figure 5 This is a schematic diagram of the operation of the micro switch of the present invention;

[0030] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the air suction pipe according to the second embodiment of the present invention;

[0032] In the figure: 100, housing; 110, micro switch; 120, air inlet; 130, air outlet; 140, receiving slot; 150, circular rib; 160, blowpipe; 170, collection bag; 180, handle; 200, fan; 300, grille; 310, starting protrusion; 320, air inlet; 330, rotating shaft; 331, return spring; 400, interlocking mechanism; 410, movable cam; 4 11. Arc-shaped protrusion; 412. Cam surface; 413. Second narrow slot; 414. First limit spring; 420. Cover; 421. First through hole; 422. Second through hole; 423. Annular groove; 500. Release button; 510. Squeeze bar; 600. Start switch; 700. Pivoting start element; 710. Start spring; 800. Suction tube; 810. Start protrusion; 820. Engageable lug. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0034] Example 1

[0035] At this time, the blowing and suction fan is in the blowing state.

[0036] like Figure 1-5 As shown, a blowing and suction fan comprises:

[0037] The outer shell 100 is provided with a handle 180 for carrying, and a motor is provided in the outer shell 100. A first switch is provided in the outer shell 100 to control the start of the motor. The first switch needs to be started before the motor can be started. The outer shell 100 is also provided with an air inlet 120 and an air outlet 130. The air inlet 120 is provided with a grille 300, and the air outlet 130 is provided with a blow pipe 160. Air enters from the grille 300 and is then ejected through the blow pipe 160.

[0038] The fan 200 is disposed in the housing 100 . The fan 200 is driven by a motor. The fan 200 is exposed to the outside through the air inlet 120 .

[0039] Accessory, the accessory is set as a grille 300, that is, the grille 300 is releasably attached to the housing 100, the grille 300 covers the fan 200, and the grille 300 can prevent the human body from directly contacting the fan 200 and causing dangerous accidents. A starting protrusion 310 for starting the first switch is provided on the grille 300. The first switch is started by the protruding starting part to control the start of the motor, ensuring that the motor cannot be started when the grille 300 is not installed, and the fan 200 cannot move, thereby ensuring safety.

[0040] Likewise, a plurality of air inlet holes 320 are provided on the grille 300 for air intake, but a person cannot extend a part of the body into the air inlet 120 through the air inlet holes 320 .

[0041] The interlocking mechanism 400 is used to connect the accessory to the housing 100. The interlocking mechanism 400 includes a movable cam 410. The movable cam 410 moves between a locking position and an unlocking position to lock or unlock the grille 300. When the movable cam 410 moves to the locking position, the grille 300 is locked and cannot be released. When the movable cam 410 moves to the unlocking position, the grille 300 can be freely released.

[0042] Preferably, a release button 500 is also provided, and the release button 500 is provided on the housing 100. An extrusion bar 510 is provided under the release button 500. The release button 500 controls the movable cam 410 to move from a locked position to an unlocked position through the extrusion bar 510. The grille 300 can be changed from a locked state with the housing 100 to a freely released state through the release button 500.

[0043] Furthermore, an arc-shaped protrusion 411 is provided on one side of the movable cam 410, and one end of the squeezing strip 510 is connected to the bottom of the release button 500, and the other end is in contact with the inclined edge of the arc-shaped protrusion 411. When the grille 300 needs to be released, it is only necessary to slide the release button 500 on the shell 100 parallel to the ground. The release button 500 will drive the squeezing strip 510 to squeeze the arc-shaped protrusion 411 of the movable cam 410. Since the inclined edge of the arc-shaped protrusion 411 is squeezed, the movable cam 410 will move from the locked position to the unlocked position, thereby completing the unlocking of the grille 300. The translation operation method is more in line with the operating habits, and the release button 500 can be operated very intuitively.

[0044] Preferably, the housing 100 is provided with a receiving slot 140 for accommodating the starting protrusion 310, and a circular ring rib 150 is provided at the air outlet of the housing 100. The interlocking mechanism 400 also includes a cover 420, both ends of which are fixed to the housing 100 by bolts. An annular cavity is provided between the cover 420 and the circular ring rib 150, and the movable cam 410 is arranged in the annular cavity, and the receiving slot 140 is symmetrically provided on the circular ring rib 150.

[0045] Preferably, an inclined cam surface 412 is provided on the movable cam 410, and a plurality of second slots 413 are provided on the movable cam 410. The width of the second slots 413 is greater than the width of the receiving slot 140. The inclined cam surface 412 is formed by extending inward from the upper end of the second slot 413. When the movable cam 410 is in the locked position, the inclined cam surface 412 is provided above the receiving slot 140. At this time, the lower part of the second slot 413 is connected with the lower part of the receiving slot 140, which can be used to place the starting protrusion 310 of the grille 300. When the movable cam 410 is in the unlocked position, the inclined cam surface 412 is moved away from above the receiving slot 140. At this time, the receiving slot 140 is completely connected with the second slot 413, and the starting protrusion 310 can be released from the receiving slot 140.

[0046] Moreover, the annular rib 150 is only symmetrically provided with the receiving slot 140 , and the movable cam 410 is also only symmetrically provided with the second slot 413 and the inclined cam surface 412 , which is easy to produce.

[0047] In this embodiment, in order to facilitate production, inclined cam surfaces 412 are provided on the four second slots 413. For example, in order to save materials, it is only necessary to provide an inclined cam surface on the second slot connected to the starting protrusion. Since one end of the grille 300 is rotatably connected to the outer shell, it is only necessary to clamp the opposite end.

[0048] Preferably, a first through groove is provided on the cover 420, and the first through groove is connected with the second narrow groove 413 and the upper end of the receiving narrow groove 140, so that the starting protrusion 310 can extend into the receiving narrow groove 140 from the upper ends of the first through groove and the second through groove, and can limit the movement of the movable cam 410 in the extension direction along the circular retaining edge 150.

[0049] Similarly, a first through hole 421 is provided on the cover 420, and the upper portion of the release button 500 extends out of the outside of the cover 420 through the first through hole 421. Since the cover 420 is attached to the outer surface of the shell 100, the upper portion of the release button 500 is provided on the outside of the shell 100, and the lower portion of the release button 500 is provided inside the shell 100 to control the rotation of the movable cam 410, thereby preventing external objects from affecting its movement.

[0050] Preferably, a second through hole 422 is also provided on the cover 420, which is connected to the air inlet 120 and is used to install the grille 300. The edge of the second through hole is bent inward to form a bent edge, and an annular groove 423 is provided between the bent edge and the bottom of the cover. The upper edge of the circular retaining edge 150 can be inserted into the annular groove 423, and the annular groove 423 can also be used to limit the position of the cover 420.

[0051] Further preferably, one end of the grille 300 is rotatably connected to the housing 100, and the other end is engaged in the receiving slot 140 via an activation protrusion 310. In this embodiment, a rotational shaft 330 is provided at the rotational connection between the grille 300 and the housing 100, and a return spring 331 is provided on the rotational shaft 330. When the grille 300 is to be installed, it is only necessary to engage the other end in the receiving slot 140, without the need for other connecting components. At the same time, once the activation protrusion 310 on the grille 300 is released, the return spring 331 on the rotational shaft 330 can quickly return to its original position, rotating to a side away from the air inlet 120, so that the grille 300 can be unlocked with just one hand. In other embodiments, other rotatable connection methods can also be used, and are not limited to the rotational shaft 330 designed in this embodiment.

[0052] Regarding the rotating shaft 330 provided in this embodiment, the rotating shaft 330 passes through the two through holes of the end of the grille 300 that connects to the shell 100. The rotating shaft 330 can be fixed relative to the shell 100, but the grille 300 and the rotating shaft 330 can rotate relative to each other, or the rotating shaft 330 can rotate relative to the shell 100, and the rotating shaft 330 and the grille 300 are fixedly connected, that is, the rotating shaft 330 is fixed in the through hole of the grille 100. It also includes providing two rotating shafts, one end of the two rotating shafts is respectively connected to the two through holes in the grille, and the other end is respectively connected to the two sides of the shell, which can save some materials. The specific arrangement of the rotating shaft is not limited to the method listed in this embodiment. In actual production or operation, it can be selected according to actual needs.

[0053] Preferably, a starting switch 600 is also included. The starting switch 600 is arranged on the outside of the shell 100. The starting switch 600 is connected in series with the first switch. Only when the first switch and the starting switch 600 are started at the same time, the motor can be started and drive the fan 200 to move. Therefore, after the grille 300 is installed to start the first switch, the starting switch 600 needs to work in order for the entire unit to operate. When the grille 300 is not installed, even if the starting switch 600 works, the entire unit cannot operate.

[0054] A first limiting spring 414 is provided on the movable cam 410, and the movable cam 410 is biased toward the locked position by the first limiting spring 414. When the release button 500 squeezes the movable cam 410, the first limiting spring 414 is squeezed at the same time, so that the movable cam 410 is biased toward the unlocked position. When the external force is removed, the movable cam 410 can be moved to the locked position by the restoring force of the first limiting spring 414.

[0055] The first switch is set as a micro switch 110, and there are two micro switches 110. The two micro switches 110 are set in parallel. When one of the micro switches 110 is damaged, the other can also play the role of a series starting switch 600, and the whole machine will not fail to work due to the damage of a single micro switch 110.

[0056] It also includes a pivoting starting element 700. When the starting protrusion 310 is connected to the pivoting starting element 700, both ends of the pivoting starting element 700 are adjacent to the two micro switches 110. The pivoting starting element 700 is V-shaped as a whole. When the starting protrusion 310 is inserted into the receiving slot 140, the starting protrusion 310 will drive the pivoting starting element 700 to rotate. The pivoting starting element 700 is fixed to the housing 100 through a movable shaft and can rotate around the movable shaft. A starting spring 710 is provided on the pivoting starting element 700. The starting spring 710 can ensure that both ends of the initial position of the pivoting starting element 700 are not adjacent to the micro switches 110. After the starting protrusion 310 is separated from the pivoting starting element 700, the restoring force of the starting spring 710 drives the pivoting starting element 700 back to the initial position to ensure its safety.

[0057] Example 2

[0058] At this time, the blowing and suction fan is in the suction state.

[0059] like Figure 2-7 As shown, a blowing and suction fan comprises:

[0060] The outer shell 100 is provided with a handle 180 for carrying, and a motor is provided in the outer shell 100. A first switch is provided in the outer shell 100 to control the start of the motor. The first switch needs to be started before the motor can be started. The outer shell 100 is also provided with an air inlet 120 and an air outlet 130. The air inlet 120 is provided with a suction pipe 800, and the air outlet 130 is provided with a collection bag 170. Debris and air are sucked into the collection bag 170 through the suction pipe 800, and the air is discharged through the fine holes on the collection bag 170, thereby sucking some debris and garbage into the collection bag 170.

[0061] The fan 200 is disposed in the housing 100 . The fan 200 is driven by a motor. The fan 200 is exposed to the outside through the air inlet 120 .

[0062] Accessory, the accessory is set as a suction pipe 800, that is, the suction pipe 800 is releasably attached to the housing 100, the suction pipe 800 covers the fan 200, and the suction pipe 800 can prevent the human body from directly contacting the fan 200 and causing dangerous accidents. A starting protrusion 810 for starting the first switch is provided on the suction pipe 800. The first switch is started by the protruding starting part to control the start of the motor, ensuring that the motor cannot be started when the suction pipe 800 is not installed, and the fan 200 cannot move, thereby ensuring safety.

[0063] Interlocking mechanism 400, the interlocking mechanism 400 is used to connect the accessory with the housing 100, the interlocking mechanism 400 includes a movable cam 410, the movable cam 410 moves between a locking position and an unlocking position to lock or unlock the suction pipe 800, when the movable cam 410 moves to the locking position, the suction pipe 800 is locked and cannot be released, when the movable cam 410 moves to the unlocking position, the suction pipe 800 can be freely released.

[0064] Preferably, a release button 500 is also provided, and the release button 500 is arranged on the outer shell 100. An extrusion bar 510 is provided under the release button 500. The release button 500 controls the movable cam 410 to move from a locked position to an unlocked position through the extrusion bar 510. The suction tube 800 can be changed from a locked state with the outer shell 100 to a freely released state through the release button 500.

[0065] Furthermore, an arc-shaped protrusion 411 is provided on one side of the movable cam 410, and one end of the squeezing strip 510 is connected to the bottom of the release button 500, and the other end is in contact with the inclined edge of the arc-shaped protrusion. When the suction pipe 800 needs to be released, it is only necessary to slide the release button 500 on the shell 100 parallel to the ground. The release button 500 will drive the squeezing strip 510 to squeeze the arc-shaped protrusion of the movable cam 410. Since the inclined edge of the arc-shaped protrusion is squeezed, the movable cam 410 will move from the locked position to the unlocked position, completing the unlocking of the suction pipe 800. The linear operation method is more in line with operating habits, and the release button 500 can be operated very intuitively.

[0066] Preferably, the housing 100 is provided with a receiving slot 140 for accommodating the starting protrusion 810, and a circular ring rib 150 is provided at the air outlet of the housing 100. The interlocking mechanism 400 also includes a cover 420, both ends of which are fixed to the housing 100 by bolts. An annular cavity is provided between the cover 420 and the circular ring rib 150, and the movable cam 410 is arranged in the annular cavity, and the receiving slot 140 is symmetrically provided on the circular ring rib 150.

[0067] Preferably, an inclined cam surface 412 is provided on the movable cam 410, and a plurality of second slots 413 are provided on the movable cam 410. The width of the second slot 413 is greater than the width of the receiving slot 140. The inclined cam surface 412 is formed by extending inward from the upper end of the second slot 413. When the movable cam 410 is in the locked position, the inclined cam surface 412 is provided above the receiving slot 140. At this time, the lower part of the second slot 413 is connected with the lower part of the receiving slot 140, which can be used to place the starting protrusion 810 of the suction pipe 800. When the movable cam 410 is in the unlocked position, the inclined cam surface 412 is moved away from above the receiving slot 140. At this time, the receiving slot 140 is completely connected with the second slot 413, and the starting protrusion 810 can be released from the receiving slot 140.

[0068] Moreover, the annular rib 150 is only symmetrically provided with the receiving slot 140 , and the movable cam 410 is also only symmetrically provided with the second slot 413 and the inclined cam surface 412 , which is easy to produce.

[0069] Preferably, a first through groove is provided on the cover 420, and the first through groove is connected with the second narrow groove 413 and the upper end of the receiving narrow groove 140, so that the starting protrusion 810 can extend into the receiving narrow groove 140 from the upper ends of the first through groove and the second through groove, and can limit the movement of the movable cam 410 in the extension direction along the circular retaining edge 150.

[0070] Similarly, a first through hole 421 is provided on the cover 420, and the upper portion of the release button 500 extends out of the outside of the cover 420 through the first through hole 421. Since the cover 420 is attached to the outer surface of the shell 100, the upper portion of the release button 500 is provided on the outside of the shell 100, and the lower portion of the release button 500 is provided inside the shell 100 to control the rotation of the movable cam 410, thereby preventing external objects from affecting its movement.

[0071] Preferably, a second through hole 422 is also provided on the cover 420, which is connected to the air inlet 120 and is used to install the suction pipe 800. The edge of the second through hole 422 is bent inward to form a bent edge, and an annular groove 423 is provided between the bent edge and the bottom of the cover 420. The upper edge of the circular retaining edge 150 can be inserted into the annular groove 423, and the annular groove 423 can also be used to limit the position of the cover 420.

[0072] Further preferably, an engageable lug 820 is also provided on the suction pipe 800. The suction pipe 800 cannot be completely fixed on the housing 100 by the starting protrusion 810 set on one side alone. The additional engageable lug 820 can cooperate with other receiving slots 140. Similarly, when the engageable lug 820 squeezes the inclined cam surface 412, it squeezes the cam surface 412 on the other receiving slots 140, and cooperates to play a fixing role.

[0073] Preferably, a starting switch 600 is also included. The starting switch 600 is arranged on the outside of the shell 100. The starting switch 600 is connected in series with the first switch. Only when the first switch and the starting switch 600 are started at the same time, the motor can be started and drive the fan 200 to move. Therefore, after the suction pipe 800 is installed to start the first switch, the starting switch 600 needs to work in order for the whole to operate. When the suction pipe 800 is not installed, even if the starting switch 600 works, the whole cannot operate.

[0074] A first limiting spring 414 is provided on the movable cam 410, and the movable cam 410 is biased toward the locked position by the first limiting spring 414. When the release button 500 squeezes the movable cam 410, the first limiting spring 414 is squeezed at the same time, so that the movable cam 410 is biased toward the unlocked position. When the external force is removed, the movable cam 410 can be moved to the locked position by the restoring force of the first limiting spring 414.

[0075] The first switch is set as a micro switch 110, and there are two micro switches 110. The two micro switches 110 are set in parallel. When one of the micro switches 110 is damaged, the other can also play the role of a series starting switch 600, and the whole machine will not fail to work due to the damage of a single micro switch 110.

[0076] It also includes a pivoting starting element 700. When the starting protrusion 810 is connected to the pivoting starting element 700, both ends of the pivoting starting element 700 are adjacent to the two micro switches 110. The pivoting starting element 700 is V-shaped as a whole. When the starting protrusion 810 is inserted into the receiving slot 140, the starting protrusion 810 will drive the pivoting starting element 700 to rotate. The pivoting starting element 700 is fixed to the housing 100 through a movable shaft and can rotate around the movable shaft. A starting spring 710 is provided on the pivoting starting element 700. The starting spring 710 can ensure that both ends of the initial position of the pivoting starting element 700 are not adjacent to the micro switches 110. After the starting protrusion 810 is separated from the pivoting starting element 700, the restoring force of the starting spring 710 drives the pivoting starting element 700 back to the initial position to ensure its safety.

[0077] The present invention provides a blowing and suction fan. Generally, when switching between the blowing state and the suction state of the blowing and suction fan, the grille and the suction pipe need to be removed and rotated. At this time, the fan is exposed. Once the start switch is accidentally touched, the fan will rotate, which may easily cause a dangerous accident. In this application, a microswitch is set in series with the start switch. When the grille or the suction pipe is not installed, the microswitch cannot be started, thereby improving the safety performance of the blowing and suction fan. The two microswitches are set in parallel to prevent the entire fan from being unable to operate when a certain microswitch is damaged. At the same time, one end of the grille is rotatably connected to the outer shell. When the grille is removed, it can be rotated 180°, and the loss of the grille can be prevented. At the same time, an interlocking mechanism is set to lock the grille or the suction pipe, and a release button is provided on the upper side of the outer shell. The movable cam can be driven to move from the locked position to the unlocked position through the translation of the release button, which is more in line with the operator's operating habit of the release button.

[0078] The technical solutions of the present invention have been described in detail above with reference to the accompanying drawings, and the embodiments described are intended to facilitate understanding of the concepts of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A blowing and suction fan, characterized in that: include: a housing, wherein a motor and a first switch are disposed in the housing, and the first switch controls the start of the motor; a fan, the fan being disposed in the housing and driven by the motor; an accessory, the accessory being releasably attached to the housing, the accessory covering the fan, the accessory being provided with an activation protrusion for activating the first switch; an interlocking mechanism for connecting the accessory to the housing, the interlocking mechanism comprising a movable cam, the movable cam moving between a locking position and an unlocking position to lock or unlock the accessory; a release button, the release button being disposed on the housing, the release button driving the movable cam to rotate by translation, thereby controlling the movable cam to move from a locked position to an unlocked position, the lower portion of the release button being located within the housing; The accessory is a grille or an air suction pipe, and the air suction pipe is also provided with an engageable lug; The housing is provided with a receiving slot for accommodating the activation protrusion and the engageable lug; The movable cam is provided with an inclined cam surface, and when the movable cam is in the locked position, the inclined cam surface is disposed above the receiving slot; The movable cam is provided with a plurality of second slots, and the inclined cam surface is formed by extending inwardly from the upper end of the second slots; The activation projection may abut the inclined cam surface.

2. A blowing and suction fan according to claim 1, characterized in that: One end of the grille can be rotatably connected to the housing, and the other end can be clamped in the receiving slot through the starting protrusion.

3. The blowing and suction fan according to claim 1, characterized in that: It also includes a start switch, which is arranged outside the shell and is connected in series with the first switch.

4. The blowing and suction fan according to claim 1, characterized in that: The movable cam is provided with a first limiting spring, and the movable cam is biased toward the locking position by the first limiting spring.

5. The blowing and suction fan according to claim 1, characterized in that: An extrusion strip is provided under the release button, an arc-shaped protrusion is provided on one side of the movable cam, one end of the extrusion strip is connected to the bottom of the release button, and the other end is in contact with the inclined edge of the arc-shaped protrusion.

6. A blowing and suction fan according to claim 1 or 3, characterized in that: The first switch is configured as a micro switch, two micro switches are configured, and the two micro switches are configured in parallel.

7. The blowing and suction fan according to claim 6, characterized in that: The invention also includes a pivoting starting element. When the starting protrusion is in contact with the pivoting starting element, two ends of the pivoting starting element are adjacent to the two micro switches.

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