CN210271058U - Automatic weighing apparatus's of vending machine pendulum rod - Google Patents

Abstract

The utility model provides an automatic vending machine is with metering device's pendulum rod designs unmanned technical field that sells goods, including first sector plate, connecting plate and the second sector plate that from top to bottom sets gradually, first sector plate is the same with second sector plate structure and sets up relatively, the connecting plate is oval and the center is provided with a through-hole that runs through the connecting plate, be provided with a pair of ring channel outside the through-hole relatively on the connecting plate. The utility model provides an automatic vending machine is with metering device's pendulum rod can contact with the goods better to measure the goods, also can restrict the business turn over of goods simultaneously, make things convenient for the staff to supervise the goods of automatic vending machine.

Description

Automatic weighing apparatus's of vending machine pendulum rod

Technical Field

The utility model relates to an unmanned technical field that sells goods, concretely relates to automatic vending machine metering device's pendulum rod.

Background

The vending machine is a common commercial automation device, is not limited by time and place, can save manpower and facilitate transaction, and is also called a micro supermarket with 24-hour business. Vending machines were developed in the 70's of the 20 th century from japan and europe and the united states. In japan, 70% of canned beverages are sold by vending machines. There are 50 million beverage dispensers distributed worldwide by the well known beverage merchant coca-cola company.

When the vending machine measures the goods, the number of the placed goods is generally calculated manually and registered in the system, the user deducts the number of the corresponding goods according to the payment record after purchasing the corresponding goods, and the replenishment worker determines the selling amount of the corresponding goods according to the goods residual data of the system and determines whether the goods need to be replenished or not.

However, in the in-service use process, the problem of card goods appears easily in the automatic vending machine of locking, and the user is after the payment is accomplished, and the goods does not come out, and the system has subtracted corresponding goods quantity, and the maintenance personal department can not in time be fed back to in the machine problem, also can make the customer disappointed, finally leads to customer's loss. And to unmanned supermarket, the goods are not all locked, and the customer can take out the goods by oneself and carry out the payment, because unmanned on duty, the consumption relies on the consciousness entirely, probably has partial user directly to tear the label, avoids the payment, and this actual quantity that not only can lead to the goods is less than the quantity that the system shows, can't in time remind the replenishment person to replenish the goods, still can cause huge goods loss.

Consequently, there is certain problem in current automatic vending trade, the goods quantity is difficult to accurate statistics, lead to goods loss or the replenishment of replenishment person untimely, machine shipment trouble also can't in time feed back simultaneously, cause very big inconvenience to user's use, consequently, need to design a device that can carry out accurate statistics to the automatic vending machine goods urgent need, so that remind the replenishment person in time to replenish the goods, and can assist the control system of automatic vending machine to carry out timely emergency treatment and feed back to the staff to the card goods phenomenon.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic vending machine is with metering device's pendulum rod, its metering device that is arranged in automatic vending machine, the quality is light and handy, can reduce the holistic weight of device to can return fast after receiving the goods striking, can restrict the goods business turn over by auxiliary device simultaneously.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that:

the utility model provides an automatic metering device's for vending machine pendulum rod, includes first sector plate, connecting plate and the second sector plate that from top to bottom sets gradually, first sector plate is the same and relative setting with second sector plate structure, the connecting plate is oval and the center is provided with a through-hole that runs through the connecting plate, be provided with a pair of ring channel outside the through-hole relatively on the connecting plate.

Furthermore, the annular grooves are symmetrically arranged on the same side of the connecting plate, and the angle between the two ends of each annular groove and the connecting line of the circle centers of the through holes is 90-180 degrees.

Furthermore, the annular grooves are arranged on two sides of the connecting plate, the two annular grooves face oppositely, the angle between the two ends of each annular groove and the connecting line of the circle centers of the through holes is larger than 90 degrees and smaller than 360 degrees, the upper ends of the two annular grooves are located on the same horizontal line, and the lower ends of the two annular grooves are also located on the same horizontal line.

Furthermore, a first arc-shaped plate and a second arc-shaped plate are symmetrically arranged on the first sector-shaped plate, the first arc-shaped plate is located on the front face of the first sector-shaped plate, the second arc-shaped plate is located on the back face of the first sector-shaped plate, and the first arc-shaped plate and the second arc-shaped plate extend from one side of the first sector-shaped plate to the other side.

Furthermore, the lower end of the second fan-shaped plate is provided with a first balance rod positioned at the same side as the first arc-shaped plate and a second balance rod positioned at the same side as the second arc-shaped plate, the first balance rod and the second balance rod are respectively positioned at two sides of the second fan-shaped plate, at least one pair of balance holes penetrating through the first fan-shaped plate are symmetrically arranged above the first arc-shaped plate, a pair of balance grooves perpendicular to the length direction of the through hole is arranged at the connecting end of the first fan-shaped plate and the connecting plate, and the sum of the volumes of the first balance rod, the second balance rod, the groove and the balance groove is equal to the sum of the volumes of the first arc-shaped plate and the second arc-shaped plate.

Furthermore, two sides of the top of the first sector plate are respectively provided with an elongated plate, and the elongated plates are perpendicular to the first arc-shaped plate.

Furthermore, a groove is formed in the center of the top of the first fan-shaped plate, and a neodymium iron boron strong magnet is arranged in the groove.

Furthermore, a square mounting frame is sleeved outside the swing rod, the length direction of the swing rod is parallel to the opening direction of the mounting frame, the swing rod is located in the center of the mounting frame, a mandrel penetrates through the through hole and is rotatably connected with the mandrel, two ends of the mandrel are fixedly connected with the mounting frame, torsion springs sleeved outside the mandrel are arranged on the front side and the rear side of the connecting plate respectively, each torsion spring comprises a first torsion arm and a second torsion arm, the first torsion arms are fixedly connected with the mounting frame, the second torsion arms are wound into a hook shape and are arranged outside the connecting plate in an encircling manner, the opening directions of the two second torsion arms are arranged oppositely, a micro switch is arranged on the mounting frame, and the swing rod can rotate around the mandrel and press the micro switch under the impact of goods; the installation frame is provided with two electromagnet locks which are respectively positioned at two sides of the mandrel, the electromagnet locks are push-pull electromagnets or self-holding electromagnets, each electromagnet lock comprises a shell and two slide bars, and the positions of the two slide bars are opposite to the positions of the two annular grooves and can be inserted into the two annular grooves.

The beneficial effects of the utility model are concentrated and are embodied in:

the utility model provides a first sector plate and a second sector plate are respectively arranged at two ends of a swing rod of a metering device for an automatic vending machine, and one end of the second sector plate is wide and is used for contacting goods, so that the goods can more easily push the second sector plate to move, and the swing rod swings; meanwhile, the annular groove is formed in the oscillating rod, and a limiting rod piece can be assisted to limit the rotating direction of the oscillating rod, so that the oscillating rod can only rotate or cannot rotate towards a single direction, the goods can be limited to enter and exit, the size of the oscillating rod is small, the weight of the metering device is reduced, and the burden borne by a goods shelf is reduced.

Drawings

Fig. 1 is a schematic structural view of the upright state of the swing rod of the present invention;

FIG. 2 is a schematic view of a structure in which a swing link rotates to the horizontal direction;

FIG. 3 is a perspective view of the metering device;

FIG. 4 is a schematic cross-sectional view of a metering device;

FIG. 5 is a schematic view of a structure of an elongated plate;

reference numerals: 1-mounting frame, 201-first sector plate, 202-connecting plate, 203-second sector plate, 204-first arc plate, 205-second arc plate, 206-first balance rod, 207-second balance rod, 208-balance hole, 209-balance groove, 210-annular groove, 211-lengthening plate, 3-microswitch, 4-through hole, 6-mandrel, 7-torsion spring, 701-second torsion arm, 8-electromagnet lock, 9-sliding rod, 11-groove, 10-strong magnet and 12-detection circuit board.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-4, the swing link of the metering device for the vending machine is installed in the metering device, and is used for rotating and extruding the micro switch 3 in the metering device under the pushing of the goods, and counting the quantity of the goods passing in and out through the connection or disconnection of the micro switch 3, and includes a first sector plate 201, a connecting plate 202 and a second sector plate 203 which are sequentially arranged from top to bottom, the first sector plate 201 and the second sector plate 203 are identical in structure and are oppositely arranged, the connecting plate 202 is oval, a through hole 4 penetrating through the connecting plate 202 is arranged at the center, a pair of annular grooves 210 which are annularly arranged outside the through hole 4 are oppositely arranged on the connecting plate 202, the upper ends of the two annular grooves 210 are located on the same horizontal line, the lower ends of the two annular grooves are also located on the same horizontal line, and the. When the annular grooves 210 are symmetrically arranged on the same surface of the connecting plate 202, the angle between the connecting line from the two ends of the annular groove 210 to the circle center of the through hole 4 is between 90 and 180 degrees. When the two annular grooves 210 are respectively located on two symmetrical surfaces of the annular groove 210, the two annular grooves 210 face to each other, one annular groove is located on the left side and the other annular groove is located on the right side, and the angle between the two ends of the annular groove 210 and the connecting line of the circle centers of the through holes 4 is larger than 90 degrees and smaller than 360 degrees.

Wherein the utility model discloses a used metering device of pendulum rod can carry out following setting: the swing rod is sleeved with a square mounting frame 1 which is used as a basic mounting frame 1 of the metering device, the length direction of the swing rod is parallel to the opening direction of the mounting frame 1, the swing rod is positioned in the center of the mounting frame 1, a mandrel 6 penetrates through a through hole 4, the swing rod can rotate around the mandrel 6, two ends of the mandrel 6 are fixedly connected with the mounting frame 1, the front side and the rear side of a connecting plate 202 are respectively provided with a torsion spring 7 which is sleeved outside the mandrel 6, the torsion springs 7 comprise a first torsion arm and a second torsion arm 701, the first torsion arm is positioned at one side close to the mounting frame 1, the first torsion arm is fixedly connected with the mounting frame 1, the second torsion arm 701 is positioned at one side close to the swing rod, the second torsion arm 701 is wound into a hook shape and is arranged outside the connecting plate 202, the opening directions of the two second torsion arms 701 are oppositely arranged, namely, the connecting plate 202 is positioned at the centers of the two second torsion, the swing rod can rotate around the mandrel 6 under the impact of goods and press the microswitch 3; wherein, micro-gap switch 3 is current commodity, can directly purchase from the market, during the installation, directly set up the slotted hole on installing frame 1, through the screw with micro-gap switch 3 install in the slotted hole can, micro-gap switch 3 generally sets up the switch main part in the casing to be provided with an action reed and fixed contact in the casing outside, make the terminal movable contact of action reed and fixed contact through pressing the action reed and accomplish the action, and external force unloads the back, the action reed produces the direction effect, returns the normal position in the twinkling of an eye and makes movable contact and fixed contact separation the utility model discloses well micro-gap switch 3 when installing, make the orientation of action reed and the pressing direction looks adaptation of pendulum rod can. Still be provided with two solenoid locks 8 that are located 6 both sides of dabber respectively on the installing frame 1, the position of solenoid lock 8 is relative with the position of ring channel 210, promptly when ring channel 210 sets up at the homonymy, two solenoid locks 8 also are located the homonymy of installing frame 1, and when two ring channels 210 are not located the homonymy, two solenoid locks 8 also are correspondingly located two different lateral walls of installing frame 1, solenoid lock 8 is plug-type electro-magnet or self-sustaining electro-magnet, solenoid lock 8 includes casing and slide bar 9, the position of two slide bars 9 is relative with the position of two ring channels 210 and can insert in two ring channels 210. The push-pull electromagnet and the self-holding electromagnet are all existing devices, and can be purchased directly from the market, and the principle of the push-pull electromagnet and the self-holding electromagnet is explained by taking the example as an example, the push-pull electromagnet generally comprises a casing, a coil is arranged in the casing, a channel is arranged in the coil, a fixed iron core is arranged at one end of the channel and can be fixedly connected with the casing, a sliding rod 9 is a movable iron core which can slide in the channel, one end of the sliding rod 9 extends out of the casing, a reset spring can be arranged between the fixed iron core and the sliding rod 9, a check ring can also be arranged at one side of the sliding rod 9 extending out of the casing, a reset spring is arranged between the check ring and the casing, when the coil is not electrified, the sliding rod 9 extends out under the action of the reset spring, namely, in the utility model, the sliding rod 9 is inserted into the annular groove 210, and when, causing the slide rod 9 to retract away from the annular groove 210. The general unidirectional self-holding electromagnet comprises a shell, wherein 1 coil is arranged in the shell, a channel is also arranged in the coil, a strong magnet is arranged in the channel, a sliding rod 9 is a movable iron core and can slide in the channel, a check ring is arranged at one side of the sliding rod 9 extending out of the shell, a return spring is arranged between the check ring and the shell, for the arrangement of the coil, if a red wire of the coil is connected with a positive pole and a black wire of the coil is connected with a negative pole, when the coil is electrified, the sliding rod 9 is sucked, namely the sliding rod leaves the annular groove 210, after power failure, the sliding rod 9 still keeps a sucked state due to the existence of the strong magnet, and if the sliding rod 9 needs to be extended out, a reverse voltage or current is applied to the coil, and the magnetic force of the strong magnet is cancelled or weakened, so that the sliding rod 9 smoothly extends into the annular groove 210 with the help of the return spring, and the locking effect of the sliding rod 9 is realized. In the embodiment, the self-holding electromagnet is selected, continuous power supply is not needed, when the sliding rod 9 needs to extend or retract, the coil only needs to be electrified briefly, the self-holding electromagnet is more electricity-saving when used in the vending machine, and the self-holding electromagnet is more durable compared with a push-pull electromagnet.

In the use, install metering device in the goods way top of automatic vending machine, during stereoplasm goods way such as bottle or books, can receive blockking of second sector plate 203, can promote the fan-shaped rotation of second along with the removal of goods, thereby make first sector plate 201 remove to micro-gap switch 3 department and press micro-gap switch 3's action reed, make micro-gap switch 3 count, if shipment, then the goods reduces one, if replenishment, then the goods increase one, wherein automatic vending machine all has one set of control system, micro-gap switch 3 links into control system, directly feed back control system with the quantity that micro-gap switch 3 detected, convey the high in the clouds by control system, make the replenishment person can carry out real time monitoring to the quantity of goods. And if only need to go out when goods quantity detects, then select the installation direction when installing metering device, when the goods that come out strikes the pendulum rod, the pendulum rod presses micro-gap switch 3, in order to prevent in the goods from getting into the goods way this moment, can control solenoid 8 between dabber 6 and micro-gap switch 3 and stretch out slide bar 9, insert in the corresponding ring channel 210, and when setting up ring channel 210 and slide bar 9, need make when the pendulum rod is in vertical position, slide bar 9 just is in the lower extreme of ring channel 210, the goods that want to get into the goods way can't promote the pendulum rod and rotate, it receives the restriction of pendulum rod promptly, can't pass through. When the goods can not enter the goods channel or leave the goods channel, the sliding rods 9 of the two electromagnetic locks 8 are controlled to simultaneously extend into the annular groove 210, so that the swinging rods cannot rotate.

And because metering device installs the back on the goods shelves, it is comparatively troublesome to survey the running state of electromagnet lock, consequently can set up a detection circuitry board 12 for push-and-pull electro-magnet or self-sustaining electro-magnet, this detection circuitry board 12 is connected with control system for it is in to detect and pushes away the slide bar and stretch out or retract the state, and feed back control system with the result, makes things convenient for the staff to control it, and detection circuitry board is current device, can directly purchase on the market, no longer gives unnecessary details here. The specific mounting of the detection circuit board 12 is as follows: offer the mounting groove used for installing the electromagnetic lock on the mounting frame 1, the mounting groove is kept away from the one end opening setting of pendulum rod, and the other end seals and sets up and offers the mounting hole that supplies the slide bar 9 to pass on it, and detection circuitry board 12 is installed in the electromagnetic lock top as the apron, and detection circuitry board 12 passes through bolted connection with the top of the lateral wall of mounting groove.

When the goods strikes the pendulum rod, because second sector plate 203 bottom is the arc, and the broad, it can contact with the goods comparatively easily, promoted by the goods, still can not cause the scratch to the goods simultaneously, can play certain guard action to the goods, and in order to adapt to the use of the goods of height difference, can set up the extension plate in first sector plate 201 top both sides, this extension plate top is the arc and can dock completely with first sector plate 201 top, when second sector plate 203 drives the pendulum rod swing promptly, first sector plate 201 tip more easily contacts with micro-gap switch 3.

In some environments, goods are fed and discharged from the same side of the shelf, and at the moment, the metering device is required to calculate the quantity of the goods discharged and the quantity of the goods fed. At this moment, two micro switches 3 need to be arranged, and the two micro switches 3 are arranged on different sides of the mounting frame 1, so that when the entering goods strike the swing rod, the swing rod rotates towards one direction, the micro switch 3 in the direction is correspondingly pressed, the coming goods drive the swing rod to rotate towards the opposite direction, the swing rod presses the other micro switch 3, and the quantity of the passing goods is respectively counted. In order to better press the micro switch 3 by the swing rod and clearly distinguish the quantity of the goods entering and exiting, a first arc-shaped plate 204 and a second arc-shaped plate 205 can be arranged on the first sector-shaped plate 201, the first arc-shaped plate 204 and the second arc-shaped plate 205 are symmetrically arranged and have the same structure, the first arc-shaped plate 204 is positioned on the front surface of the first sector-shaped plate 201, the second arc-shaped plate 205 is positioned on the back surface of the first sector-shaped plate 201, the first arc-shaped plate 204 and the second arc-shaped plate 205 extend from one side to the other side of the first sector-shaped plate 201, two micro switches 3, one is opposite to the first arc-shaped plate 204, the other is opposite to the second arc-shaped plate 205, when goods enter and are taken out, the moving directions of the goods are different, therefore, the swinging directions of the swing rods are different, the number of the goods which are put in and taken out can be respectively determined through the two micro switches 3, and meanwhile, the electromagnetic iron lock 8 can be used for controlling the goods to get in and out. In addition, a groove 11 can be further formed in the center of the top of the first sector plate 201, a neodymium iron boron strong magnet 10 is arranged in the groove 11, the strong magnet 10 can be adhered in the groove 11 through glue, the top of the strong magnet is flush with the top of the groove 11, when the weighing device is used, an iron shell is installed on the metering device or is close to an iron shelf above a goods channel, and the strong magnet 10 and the torsion spring act simultaneously to accelerate the swing rod to return to the middle to be separated from the microswitch 3.

In order to balance the weight of the upper end and the lower end of the swing rod and make the swing rod easier to return, the lower end of the second fan-shaped plate 203 is provided with a first balance rod 206 which is positioned on the same side as the first arc-shaped plate 204 and a second balance rod 207 which is positioned on the same side as the second arc-shaped plate 205, the first balance rod 206 and the second balance rod 207 are respectively positioned on two sides of the second fan-shaped plate 203, at least one pair of balance holes 208 which penetrate through the first fan-shaped plate 201 are symmetrically arranged above the first arc-shaped plate 204, the connecting end of the first fan-shaped plate 201 and the connecting plate 202 is provided with a pair of balance grooves 209 which are vertical to the length direction of the through hole 4, and the sum of the volumes of the first balance rod 206, the second balance rod 207, the groove 11 and the balance grooves 209 is equal to the. When using, if the goods strikes the pendulum rod and makes first arc 204 press the micro-gap switch 3 of corresponding side, and the goods height is higher, make the pendulum rod rotate more positions, second balance bar 207 contacts with another micro-gap switch 3 lower extreme, extrude this micro-gap switch 3, it is first arc 204 at this moment to contact micro-gap switch 3 earlier, then along with the rotation of pendulum rod second balance bar 207 contacts another micro-gap switch 3 again, there is the time difference of pressing between the two, and the time difference is not long, alright come the discernment according to the precedence order that the switch was triggered and put into the goods or take out the goods, thereby the accurate volume of putting into or taking out that detects the goods, can balance the weight of pendulum rod, can not cause the influence according to metering device's normal use again.

Meanwhile, in order to prevent a plurality of goods from leaving from the lower part of the swing link simultaneously when the swing link rotates, an extension plate 211 may be respectively disposed at both sides of the top of the first sector plate 201, the extension board 211 is perpendicular to the first arc board 204, for example, a beverage bottle, when the second sector board 203 is impacted by the goods to drive the first sector board 201 to rotate, the extension board can extend into the goods passage to block the beverage bottle in the goods passage, that is, only beverage bottles hitting the second sector plate 203 are allowed to pass through, and beverage bottles located at the rear part are all blocked, so that not only can the goods be counted more accurately, but also the goods can be prevented from being stolen by someone, that is, if there is no lengthening plate, someone may pull the swing rod to make the swing rod continuously press the first micro switch or the second micro switch, only count once, but it can continue to remove the goods from the channel, and therefore the elongated plate 211 can also function to reduce the risk of loss of the goods. In order not to affect the swing link centering, the sizes of the first balance bar 206, the second balance bar 207, the groove 11 and the balance groove 209 may be changed, so that the sum of the volumes of the first balance bar 206, the second balance bar 207, the groove 11 and the balance groove 209 is equal to the sum of the volumes of the first arc-shaped plate 204, the second arc-shaped plate 205 and the lengthened plate 211.

The above embodiments are used to explain the present invention, but not to limit the present invention, and any modifications and changes made by the present invention fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides an automatic weighing machine is with metering device's pendulum rod, its characterized in that, includes first sector plate (201), connecting plate (202) and second sector plate (203) that from top to bottom set gradually, first sector plate (201) is the same with second sector plate (203) structure and sets up relatively, connecting plate (202) are oval and the center is provided with one and runs through-hole (4) of connecting plate (202), be provided with a pair of ring channel (210) around outside through-hole (4) on connecting plate (202) relatively.

2. The oscillating bar of a metering device for vending machines according to claim 1, characterized in that said annular groove (210) is symmetrically arranged on the same side of the connecting plate (202), and the angle between the line connecting the two ends of said annular groove (210) to the centre of the through hole (4) is between 90 and 180 °.

3. The swing link of the metering device for the vending machine according to claim 1, wherein the annular grooves (210) are arranged on two sides of the connecting plate (202), the two annular grooves (210) face to each other, the angle between the two ends of the annular grooves (210) and the connecting line of the circle centers of the through holes (4) is greater than 90 degrees and smaller than 360 degrees, the upper ends of the two annular grooves (210) are located on the same horizontal line, and the lower ends of the two annular grooves are also located on the same horizontal line.

4. The swing link of the metering device for the vending machine according to claim 1, wherein the first sector plate (201) is symmetrically provided with a first arc plate (204) and a second arc plate (205), the first arc plate (204) is positioned on the front surface of the first sector plate (201), the second arc plate (205) is positioned on the back surface of the first sector plate (201), and the first arc plate (204) and the second arc plate (205) extend from one side of the first sector plate (201) to the other side.

5. The swing link of the metering device for the vending machine according to claim 4, wherein the lower end of the second fan-shaped plate (203) is provided with a first balance bar (206) located at the same side as the first arc-shaped plate (204) and a second balance bar (207) located at the same side as the second arc-shaped plate (205), the first balance bar (206) and the second balance bar (207) are respectively located at two sides of the second fan-shaped plate (203), at least one pair of balance holes (208) penetrating through the first fan-shaped plate (201) are symmetrically arranged above the first arc-shaped plate (204), the connecting end of the first fan-shaped plate (201) and the connecting plate (202) is provided with a pair of balance grooves (209) perpendicular to the length direction of the through hole (4), and the sum of the volumes of the first balance bar (206), the second balance bar (207), the groove (11) and the balance grooves (209) is equal to the first arc-shaped plate (204), The sum of the volumes of the second arcuate plates (205) is equal.

6. The swing link of a weighing apparatus for a vending machine according to claim 4, wherein an elongated plate (211) is provided on each of both sides of the top of the first sector plate (201), and the elongated plate (211) is perpendicular to the first arc plate (204).

7. The oscillating bar of a metering device for vending machines according to any one of claims 1-6, characterized in that a recess (11) is centrally provided on the top of said first sector plate (201), and a neodymium iron boron strong magnet (10) is provided in said recess (11).

8. The oscillating bar of the metering device for the vending machine according to claim 6, wherein the oscillating bar is sleeved with a square mounting frame (1), the length direction of the oscillating bar is parallel to the opening direction of the mounting frame (1), the oscillating bar is located at the center of the mounting frame (1), a mandrel (6) is arranged in the through hole (4) in a penetrating manner and is rotatably connected with the mandrel (6), the two ends of the mandrel (6) are fixedly connected with the mounting frame (1), torsion springs (7) sleeved outside the mandrel (6) are arranged on the front side and the rear side of the connecting plate (202), each torsion spring (7) comprises a first torsion arm and a second torsion arm (701), the first torsion arm is fixedly connected with the mounting frame (1), the second torsion arms (701) are wound into a hook shape and are annularly arranged outside the connecting plate (202), the opening directions of the two second torsion arms (701) are oppositely arranged, a microswitch (3) is arranged on the mounting frame (1), and the oscillating bar can rotate around the mandrel (6) under the impact of goods and press the microswitch (3); the mounting frame (1) is provided with two electromagnet locks (8) which are respectively positioned on two sides of the mandrel (6), the electromagnet locks (8) are push-pull type electromagnets or self-holding electromagnets, each electromagnet lock (8) comprises a machine shell and a sliding rod (9), and the positions of the sliding rods (9) are opposite to the positions of the two annular grooves (210) and can be inserted into the two annular grooves (210).

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