A commodity protection device and its usage method

Abstract

The present invention relates to a commodity protection device and its usage method which not only has high usage safety, but also has a reasonable layout, a compact structure, high production efficiency, low production cost, and low failure rate during use. A load-bearing ring is provided at the lower end of the lock core column in the lock core member, and multiple load-bearing plates are provided on the outer circumferential surface of the load-bearing ring. A plurality of convex blocks are provided in the annular cavity between the outer circumferential wall surface of the load-bearing ring and the inner circumferential wall surface of the housing. A gap is provided between two adjacent convex blocks, and the gap is located below the corresponding load-bearing plate. A partition plate is provided between the convex block and the load-bearing plate located on the slope bottom side of the convex block, and a steel ball is provided at the slope bottom of the convex block. Under the action of an external force, the steel ball can roll from the slope bottom along the slope to the corresponding load-bearing plate. Advantages: First, the device uses fewer components in assembly and the component structure complexity is lower, which not only improves the assembly efficiency but also reduces the production cost; second, the device has a more compact structure and a more reasonable layout, thus greatly reducing its volume.

Description

Technical Field

[0001] The present invention relates to a commodity protection device which not only has high usage safety, reasonable layout, compact structure, high production efficiency, low production cost, but also has low failure rate during use, and a method for using the same, belonging to the field of commodity anti-theft. Background Art

[0002] The prior patent CN 110043139 A owned by the wholly-owned subsidiary of the Company, entitled "A kind of commodity protection device", comprises a housing, a lock core component, a frequency element and an anti-theft nail, wherein a lock core installation cavity is provided in the housing and a lock core component is provided in the lock core installation cavity, wherein the rotating component in the lock core component can push the lock core column downward when it rotates under the drive of the magnetic unlocking device and the downwardly moving lock core column compresses the reset spring, wherein an arc-shaped ramp groove is respectively provided on both sides of the bottom surface of the lock core installation cavity and a positioning groove is respectively provided at the top of the ramp of the two arc-shaped ramp grooves; wherein two steel ball limiting grooves are provided on the lower end surface of the rotating component, wherein a steel ball is respectively provided in the two steel ball limiting grooves and the two steel balls stop at the lowest point of the corresponding arc-shaped ramp grooves, wherein the depth of the positioning groove is less than or equal to the radius of the steel ball, or the depth of the positioning groove is greater than the radius of the steel ball. An annular cavity is provided in the housing and the annular cavity is located outside the lock core installation cavity, wherein a frequency element is provided. The housing comprises an upper cover and a lower housing; when the upper cover and the lower housing are buckled together to form the housing, the upper lock core installation cavity in the upper cover and the lower lock core installation cavity in the lower housing are closed to form a lock core installation cavity, and the upper annular cavity in the upper cover and the lower annular cavity in the lower housing are closed to form an annular cavity. The bottom surface of the lock core installation cavity is provided with two card slots, and the two card slots are located on the inner side of the bottom of the corresponding arc ramp groove, the card slots and the corresponding arc ramp groove are mutually connected, and the depth of the card slots is greater than the maximum depth of the arc ramp groove, the lower end surface of the rotating member is provided with two steel ball card slots, and the two steel ball card slots are connected with the corresponding steel ball limiting grooves, and when the two steel ball limiting grooves are located directly above the bottom of the corresponding arc ramp groove, the two steel ball card slots are located directly above the corresponding card slots. A convex column is provided in the middle of the bottom surface of the lock core installation cavity, and a groove matching the bottom surface contour of the lock core column is provided on the upper end surface of the convex column. The lock core column is installed in the lock core installation cavity after the lower end of the lock core column is plugged into the groove, and a return spring is provided between the lock core column and the bottom surface of the groove. A circular groove is provided in the middle of the lower end surface of the rotating member, and the rotating member is installed in the lock core installation cavity after the circular groove and the convex column are concave-convexly matched. A plurality of convex blocks are evenly provided at the lower part of the outer cylindrical surface of the lock core column, and a plurality of convex block slots are provided on the inner wall surface of the groove, and the size of the convex block slots matches the size of the convex blocks. Three indented grooves are provided at equal intervals on the outer wall surface of the convex column, and the length of the convex column is greater than the depth of the circular groove. The positioning groove is a spherical groove.A method for using a protection device for a commodity, comprising a housing, a lock core member, a frequency element and an anti-theft nail. The depth of the positioning groove in the housing is less than or equal to the radius of the steel ball. Step 1: First, place the protection device for the commodity on a magnetic unlocking device. The magnetic steels located on both sides in the magnetic unlocking device suck out two steel balls from the card slots and stop the steel balls at the bottom of the corresponding arc ramp grooves, realizing the simultaneous unlocking of the two steel balls. Step 2: Rotate the magnetic unlocking device. The rotating magnetic steels on both sides drive the two steel balls to rotate together. The rotating two steel balls push the rotating member to rotate, and the rotating rotating member drives the lock core column to move downward under the transmission of the mutually fitting or meshing rotating member rising surface and the lock core column rising surface. At the same time as the lock core column moves downward, the steel balls located at the upper end of the lock core column also move downward until the steel balls fall into the positioning groove. At this time, there is a gap between the steel balls, the steel ball bowls and the nail rod of the anti-theft nail, realizing the positioning and unlocking of the lock core member. Step 3: Pull out the anti-theft nail to unlock the protection device for the commodity. Step 4: Move the magnetic unlocking device away. Since the steel balls in the positioning groove lose the support of the attraction of the bottom magnetic steel in the magnetic unlocking device, the restoring force of the return spring will push the lock core column upward. The upward moving lock core column drives the rotating member to rotate in the reverse direction under the transmission of the rotating member rising surface and the lock core column rising surface. The rotating member rotating in the reverse direction takes the steel balls away from the positioning groove, and the steel balls return to the corresponding card slots along the arc ramp grooves, realizing the return of the steel balls. A method for using a protection device for a commodity, comprising a housing, a lock core member, a frequency element and an anti-theft nail. The depth of the positioning groove in the housing is greater than the radius of the steel ball. Step 1: First, place the protection device for the commodity on a magnetic unlocking device. The magnetic steels located on both sides in the magnetic unlocking device suck out two steel balls from the card slots and stop the steel balls at the bottom of the corresponding arc ramp grooves, realizing the simultaneous unlocking of the two steel balls. Step 2: Rotate the magnetic unlocking device. The rotating magnetic steels on both sides drive the two steel balls to rotate together. The rotating two steel balls push the rotating member to rotate, and the rotating rotating member drives the lock core column to move downward under the transmission of the mutually fitting or meshing rotating member rising surface and the lock core column rising surface. At the same time as the lock core column moves downward, the steel balls located at the upper end of the lock core column also move downward until the steel balls fall into the positioning groove. At this time, there is a gap between the steel balls, the steel ball bowls and the nail rod of the anti-theft nail, realizing the positioning and unlocking of the lock core member. Step 3: Pull out the anti-theft nail to unlock the protection device for the commodity. Step 4: Invert the protection device for the commodity. The two steel balls fall into the corresponding steel ball limiting grooves under the action of gravity. The restoring force of the return spring will push the lock core column downward. The downward moving lock core column drives the rotating member and the steel balls to rotate in the reverse direction together under the transmission of the rotating member rising surface and the lock core column rising surface until the rotating member rising surface and the lock core column rising surface return to the initial fitting or meshing state. Then turn the protection device for the commodity back again. After the two steel balls roll back to the bottom of the corresponding arc ramp grooves, they roll into the corresponding card slots, realizing the return of the steel balls.According to customer feedback during the use of the protection device for this kind of commodity, the following deficiencies exist: First, this kind of device requires a rotating part to cooperate with a complex lock core cylinder, making the structure of the device more complex. This not only increases the production cost of the device, but also makes it large in size and low in assembly efficiency. Second, this kind of device has many components and a complex structure, making the probability of failure during use higher. Summary of the Invention

[0003] Design purpose: To avoid the deficiencies in the background technology, a commodity protection device and its usage method are designed, which not only have high usage safety, but also have a reasonable layout, a compact structure, high production efficiency, low production cost, and low failure rate during use.

[0004] Design scheme: To achieve the above design purpose.

[0005] 1. A load-bearing ring is provided at the lower end of the lock core column in the lock core component, and multiple load-bearing plates are provided on the outer circumferential surface of the load-bearing ring. A plurality of bumps are provided in the annular cavity between the outer circumferential wall surface of the load-bearing ring and the inner circumferential wall surface of the housing, and the upper end surface of the bump is a slope surface. There is a gap between two adjacent bumps, and the gap is located below the corresponding load-bearing plate. A partition plate is provided between the bump and the load-bearing plate on the slope bottom side of the bump, and a steel ball is provided at the slope bottom of the bump. The design that the steel ball can roll along the slope from the slope bottom to the corresponding load-bearing plate under the action of an external force is one of the technical features of the present invention. The purpose of this design is as follows: When in use, first place the commodity protection device with anti-theft pins on the rotatable magnetic unlocking device. The rotating magnetic unlocking device drives a plurality of steel balls to roll from the slope bottom to the corresponding load-bearing plates along their respective slopes through magnetic force. At this time, the magnetic force in the vertical direction in the magnetic unlocking device will simultaneously attract a plurality of steel balls. Under the action of gravity, the plurality of steel balls drive the corresponding load-bearing ring, lock core column and a plurality of lock core balls to move downward together. During the downward movement of the lock core column, the spring is compressed, and at the same time, the anti-theft pins are unlocked; then, after the anti-theft pins are pulled out, take the commodity protection device off the magnetic unlocking device. Under the action of the spring restoring force, the load-bearing ring, lock core column and a plurality of lock core balls move upward together and return to their original positions. At this time, the steel balls will roll back to the slope bottom under the action of their own weight; First, this device is composed of an upper cover, a bottom cover, a load-bearing ring, a steel bowl, lock core balls, steel balls, a spring and a lock core column. Since this device does not require rotating parts and the structure of the lock core column is simpler, that is, the parts used in its assembly are fewer and the structural complexity of the parts is lower, which not only improves the assembly efficiency but also reduces the production cost; Second, this device does not require the rotating parts, positioning grooves and card slots in the original device in the background technology, and the structure of the lock core column is simpler, making the structure of this device more compact and the layout more reasonable, thus greatly reducing its volume; Third, when unlocking this device, a side magnet (ring magnet, the device is arranged in the ring magnet) that needs to be rotated and an axial super-strong magnet located at the bottom of the device are required. Only when a plurality of steel balls all roll in place and move downward simultaneously (the steel balls press down the load-bearing ring under the attraction of the axial super-strong magnet, the load-bearing ring moves downward into the limit groove surrounded by a plurality of arc-shaped bumps, and at the same time the load-bearing plate moves downward into the corresponding gap), the unlocking of the device is realized. Such an unlocking method greatly improves the unlocking difficulty because it requires the cooperation of multiple magnets in different directions to unlock, and thus improves the use safety of the device.

[0006] 2. A spring limit insert or a spring limit slot is provided on the bottom surface of the inner cavity of the housing. The lower end of the spring is in plug-in fit with the spring limit insert or the spring limit slot, and the upper end of the spring contacts the lower end surface of the lock core cylinder. The design that the lock core cylinder and the load-bearing ring are supported by the spring and arranged on the bottom surface of the inner cavity of the housing is the second technical feature of the present invention. The purpose of this design is as follows: A spring limit insert or a spring limit slot is provided on the bottom surface of the inner cavity of the housing. The lower end of the spring is in plug-in fit with the spring limit insert or the spring limit slot, and the upper end of the spring contacts the lower end surface of the lock core cylinder. The lock core cylinder and the load-bearing ring are supported by the spring and arranged on the bottom surface of the inner cavity of the housing. The spring limit insert or the spring limit slot not only facilitates the assembly of components such as the spring, but also can prevent the spring from shifting during use, thereby affecting the use effect of the device.

[0007] 3. A steel ball stop platform is provided at the bottom of the slope of the convex block. The upper end surface of the load-bearing plate is an inclined surface, and the height of the lower side end of the load-bearing plate matches the height of the top of the corresponding convex block. This design is the third technical feature of the present invention. The purpose of this design is as follows: First, the setting of the steel ball stop platform at the bottom of the slope of the convex block can avoid the risk of the steel ball getting stuck (if the angle between the partition plate and the bottom surface of the convex block slope is an acute angle, there is a certain probability that the steel ball will get stuck after falling). Second, the upper end surface of the load-bearing plate is an inclined surface, so that after the spring returns to its original state, the steel ball can fall back to its original position under the action of gravity.

[0008] 4. The inner cavity of the housing is in a "convex" shape, and a steel bowl in the lock core component is provided in the narrow cavity at the upper part of the inner cavity. The outer wall surface of the steel bowl is in interference fit with the inner wall surface of the narrow cavity. This design is the fourth technical feature of the present invention. The purpose of this design is as follows: The inner cavity of the housing is in a "convex" shape, and a steel bowl in the lock core component is provided in the narrow cavity at the upper part of the inner cavity. The outer wall surface of the steel bowl is in interference fit with the inner wall surface of the narrow cavity. This not only facilitates the assembly of the steel bowl and the housing, but also can fix the steel bowl in the narrow cavity by interference fit. In addition, multiple convex strips are longitudinally provided on the inner wall surface of the narrow cavity, and the outer wall surface of the steel bowl is in interference fit with the inner wall surface of the narrow cavity formed by the multiple convex strips. This can greatly reduce the roundness requirements of the tapered inner wall surface of the narrow cavity and the tapered outer wall surface of the steel bowl. This not only reduces the production cost of the components, but also improves the coaxiality of the assembly of the steel bowl and other lock core components, ensuring the smooth insertion and extraction of the anti-theft pin.

[0009] 5. The upper end surface of the bottom cover is provided with a plurality of bumps which are circularly distributed. The upper end of the bottom cover is provided with a lock core cylinder through a spring. The upper end of the lock core cylinder is provided with a plurality of lock core balls, and the lower end is provided with a load-bearing ring. The load-bearing ring is located in the limiting groove surrounded by the plurality of bumps, and the diameter of the limiting groove matches the diameter of the load-bearing ring. The load-bearing ring is provided with a plurality of limiting blocks, and a partition plate slot is provided between the limiting block and the corresponding load-bearing plate; the inner circular wall surface of the upper cover is provided with a plurality of partition plates. After the upper cover and the bottom cover are assembled, the plurality of partition plates are inserted into the corresponding partition plate slots, which is the fifth technical feature of the present invention. The purpose of this design is as follows: First, since the load-bearing ring is provided with a plurality of limiting blocks and a partition plate slot is provided between the limiting block and the corresponding load-bearing plate, and after the upper cover and the bottom cover are assembled, the plurality of partition plates are inserted into the corresponding partition plate slots, the partition plates play a limiting and guiding role for the load-bearing ring during the up and down movement of the load-bearing ring, ensuring that the load-bearing ring can only move up and down; Second, the inner circular wall surface of the upper cover is provided with a plurality of partition plates. Since the partition plates are fixedly connected to the inner wall surface and the top surface of the wide cavity at the lower part of the "convex"-shaped inner cavity, the combination strength between the partition plates and the upper cover is large, which can improve the service life of the partition plates.

[0010] 6. The upper end surface of the bottom cover is provided with a plurality of bumps which are circularly distributed. The upper end of the bottom cover is provided with a lock core cylinder through a spring. The upper end of the lock core cylinder is provided with a plurality of lock core balls, and the lower end is provided with a load-bearing ring. The load-bearing ring is located in the limiting groove surrounded by the plurality of bumps, and the diameter of the limiting groove matches the diameter of the load-bearing ring. The load-bearing ring is provided with a plurality of limiting blocks, and a partition plate slot is provided between the limiting block and the corresponding load-bearing plate; the upper end surface of the bottom cover is provided with a plurality of partition plates and the partition plates are located in the corresponding partition plate slots, which is the sixth technical feature of the present invention. The purpose of this design is as follows: First, since the load-bearing ring is provided with a plurality of limiting blocks and a partition plate slot is provided between the limiting block and the corresponding load-bearing plate, and the partition plates are located in the corresponding partition plate slots, the partition plates play a limiting and guiding role for the load-bearing ring during the up and down movement of the load-bearing ring, ensuring that the load-bearing ring can only move up and down; Second, the upper end surface of the bottom cover is provided with a plurality of partition plates. When the load-bearing ring and the lock core cylinder are installed on the upper end of the bottom cover through a spring, the partition plates play a role in positioning and installing the load-bearing ring, thereby improving the assembly efficiency of the device.

[0011] 7. The inner wall surface of the upper port of the load-bearing ring through-hole is provided with a first annular flange, and the outer circumferential surface of the lower end of the lock core cylinder is provided with a second annular flange. The design that the lower end surface of the first annular flange contacts the upper end surface of the second annular flange after the lock core cylinder passes through the load-bearing ring through-hole from the lower port of the load-bearing ring through-hole is the seventh technical feature of the present invention. The purpose of such a design is as follows: The inner wall surface of the upper port of the load-bearing ring through-hole is provided with a first annular flange, and the outer circumferential surface of the lower end of the lock core cylinder is provided with a second annular flange. After the lock core cylinder passes through the load-bearing ring through-hole from the lower port of the load-bearing ring through-hole, the lower end surface of the first annular flange contacts the upper end surface of the second annular flange. Since the load-bearing ring and the lock core cylinder adopt a split structure, this not only reduces the manufacturing difficulty of the load-bearing ring and the lock core cylinder (compared with the integral structure of the load-bearing ring and the lock core cylinder), but also the split-structured load-bearing ring and lock core cylinder have a slight deformation adjustment during assembly, which not only increases the assembly qualification rate of the device, but also reduces the probability of jamming of the load-bearing ring and the lock core cylinder during use.

[0012] 8. The lower end of the outer circumferential surface of the bottom cover is provided with a plurality of first bumps and a plurality of strip-shaped grooves, and the plurality of strip-shaped grooves are located above the plurality of first bumps. The lower end of the inner wall surface of the upper cover is provided with a plurality of notches and a plurality of strip-shaped ribs. The design that after the upper cover and the bottom cover are assembled, the notches are inserted and matched with the corresponding first bumps, and the strip-shaped ribs are in concave-convex fit with the corresponding strip-shaped grooves is the eighth technical feature of the present invention. The purpose of such a design is as follows: The lower end of the outer circumferential surface of the bottom cover is provided with a plurality of first bumps and a plurality of strip-shaped grooves, and the plurality of strip-shaped grooves are located above the plurality of first bumps. The lower end of the inner wall surface of the upper cover is provided with a plurality of notches and a plurality of strip-shaped ribs. After the upper cover and the bottom cover are assembled, the notches are inserted and matched with the corresponding first bumps, and the strip-shaped ribs are in concave-convex fit with the corresponding strip-shaped grooves, which can realize the quick snap-on installation of the bottom cover and the upper cover. At the same time, the concave-convex fit of the strip-shaped ribs and the corresponding strip-shaped grooves will improve the bonding strength between the two.

[0013] Technical solution 1: A commodity protection device, including a housing. A lock core member for locking an anti-theft pin is provided in the inner cavity of the housing. A load-bearing ring is provided at the lower end of the lock core cylinder in the lock core member, and a plurality of load-bearing plates are provided on the outer circumferential surface of the load-bearing ring. A plurality of bumps are provided in the annular cavity between the outer circumferential wall surface of the load-bearing ring and the inner circumferential wall surface of the housing, and the upper end surface of the bump is a slope surface. A gap is provided between two adjacent bumps, and the gap is located below the corresponding load-bearing plate. A partition plate is provided between the bump and the load-bearing plate located at the bottom side of the slope of the bump, and a steel ball is provided at the bottom of the slope of the bump. Under the action of an external force, the steel ball can roll from the bottom of the slope to the corresponding load-bearing plate.

[0014] Technical Solution 2: A method for using a commodity protection device. Step 1: First, place the commodity protection device with the anti-theft pin locked on the rotatable magnetic unlocking device. The rotating magnetic unlocking device drives multiple steel balls to roll from the bottom of their respective slopes to the corresponding load-bearing plates through magnetic force. At this time, the magnetic force in the vertical direction in the magnetic unlocking device will simultaneously attract multiple steel balls. Driven by the gravitational force, multiple steel balls drive the corresponding load-bearing rings, the lock core cylinder, and multiple lock core balls to move downward together. During the downward movement of the lock core cylinder, the spring is compressed, and at the same time, the anti-theft pin is unlocked. Step 2: After the anti-theft pin is pulled out, remove the commodity protection device from the magnetic unlocking device. Under the action of the spring restoring force, the load-bearing ring, the lock core cylinder, and multiple lock core balls move upward together and return to their original positions. At this time, the steel balls will roll back to the bottom of the slope under the action of gravity.

[0015] Compared with the background technology, first, the components used in the assembly of this device are fewer and the structural complexity of the components is lower. This not only improves the assembly efficiency but also reduces the production cost. Second, this device does not require the rotating parts, positioning grooves, and card slots in the original device in the background technology, and the structure of the lock core cylinder is simpler, making the structure of this device more compact and the layout more reasonable, thus greatly reducing its volume. Third, this device not only has high safety in use but also has a low failure rate in use. Brief Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of a commodity protection device.

[0017] Figure 2 is a cross-sectional structural schematic diagram of a commodity protection device.

[0018] Figure 3 is a three-dimensional structural schematic diagram after the assembly of the lock core cylinder and the load-bearing ring.

[0019] Figure 4 is a three-dimensional structural schematic diagram of the load-bearing ring installation.

[0020] Figure 5 is a front view structural schematic diagram of the load-bearing ring installation.

[0021] Figure 6 is a three-dimensional structural schematic diagram of the lock core cylinder.

[0022] Figure 7 is a three-dimensional structural schematic diagram of the bottom cover.

[0023] Figure 8 is a front view structural schematic diagram of the bottom cover.

[0024] Figure 9 is a three-dimensional structural schematic diagram of the upper cover.

[0025] Figure 10 is a top view structural schematic diagram of the upper cover.

[0026] Figure 11 It is a three-dimensional structural schematic diagram after the upper cover and the load-bearing ring are assembled.

[0027] Figure 12 It is a bottom view structural schematic diagram after the upper cover and the load-bearing ring are assembled.

[0028] Figure 13 It is a front view structural schematic diagram after the bottom cover, the lock core cylinder and the load-bearing ring are assembled. Specific implementation mode

[0029] Embodiment 1: Refer to the attached Figures 1 - 13 . A commodity protection device includes a housing 1 composed of an upper cover 11 and a bottom cover 12. A lock core member 3 for locking the anti-theft pin is provided in the inner cavity of the housing 1. A load-bearing ring 5 is provided at the lower end of the lock core cylinder 31 in the lock core member 3, and a plurality of load-bearing plates 51 are provided on the outer circumferential surface of the load-bearing ring 5. A plurality of load-bearing plates 51 are equidistantly provided on the outer circumferential surface of the load-bearing ring 5. A plurality of bumps 6 are provided in the annular cavity between the outer circumferential wall surface of the load-bearing ring 5 and the inner circumferential wall surface of the housing 1, and the upper end surface of the bump 6 is a slope surface. The bump 6 is provided on the bottom surface of the inner cavity of the housing 1. A gap 7 is provided between two adjacent bumps 6, and the gap 7 is located below the corresponding load-bearing plate 51. A partition plate 8 is provided between the bump 6 and the load-bearing plate 51 on the slope bottom side of the bump 6, and a steel ball 9 is provided at the slope bottom of the bump 6. Under the action of an external force, the steel ball 9 can roll from the slope bottom to the corresponding load-bearing plate 51 along the slope. A through hole 13 communicating with the inner cavity of the housing 1 is provided on the upper end surface of the housing 1, and the through hole 13 is located directly above the lock core member 3. The lock core member 3 is arranged in the inner cavity of the housing 1 through a spring 4. The height of the slope top of the bump 6 matches the height of the load-bearing plate 51 on the slope top side of the bump 6. The bump 6 is an arc-shaped bump, so that the slope surface at the upper end of the bump 6 is an arc-shaped slope. Preferably, the number of arc-shaped bumps is three, the number of load-bearing plates 51 is three, the number of gaps 7 is three, the number of partition plates 8 is three, and the number of steel balls 9 is three; the three partition plates 8 divide the annular cavity into three independent chambers, and each chamber contains a corresponding arc-shaped bump and a load-bearing plate 51, so as to avoid interference between the steel balls 9.

[0030] On the bottom surface of the inner cavity of the housing 1, there are spring limit inserts 10 or spring limit slots. The lower end of the spring 4 is inserted and fitted with the spring limit insert 10 or the spring limit slot, and the upper end of the spring 4 contacts the lower end surface of the lock core cylinder 31. The lock core cylinder 31 and the load-bearing ring 5 are supported by the spring 4 and arranged on the bottom surface of the inner cavity of the housing 1. On the slope bottom of the convex block 6, there is a steel ball stop platform 61. The upper end surface of the load-bearing plate 51 is an inclined surface, and the height of the lower side end of the load-bearing plate 51 matches the height of the slope top of the corresponding convex block 6. The inner cavity of the housing 1 is in a "convex" shape, and in the narrow cavity in the upper part of the inner cavity, there is a steel bowl 32 in the lock core member 3, and the outer wall surface of the steel bowl 32 is in interference fit with the inner wall surface of the narrow cavity. On the inner wall surface of the narrow cavity, there are multiple longitudinal protrusions, and the outer wall surface of the steel bowl 32 is in interference fit with the inner wall surface of the narrow cavity formed by the multiple protrusions. When the spring 4 elastically supports the lock core cylinder 31 and the load-bearing ring 5, the upper end surface of the load-bearing ring 5 contacts the inner top surface of the wide cavity in the lower part of the "convex" inner cavity.

[0031] On the upper end surface of the bottom cover 12, there are multiple convex blocks 6, and the multiple convex blocks 6 are circularly distributed. The upper end of the bottom cover 12 is provided with a lock core cylinder 31 through a spring 4. The upper end of the lock core cylinder 31 is provided with multiple lock core balls 33, and the lower end is provided with a load-bearing ring 5. The load-bearing ring 5 is located in the limit groove 14 surrounded by the multiple convex blocks 6, and the diameter of the limit groove 14 matches the diameter of the load-bearing ring 5. The load-bearing ring 5 is provided with multiple limit blocks 52, and there is a partition slot 53 between the limit block 52 and the corresponding load-bearing plate 51. The limit block 52 is located directly above the corresponding steel ball stop platform 61, and the distance between the limit block 52 and the steel ball stop platform 61 is greater than the diameter of the steel ball. On the inner circular wall surface of the upper cover 11, there are multiple partition plates 8. After the upper cover 11 and the bottom cover 12 are assembled, the multiple partition plates 8 are inserted into the corresponding partition slots 53. The partition plate 8 is fixedly connected to the inner wall surface and the top surface of the wide cavity in the lower part of the "convex" inner cavity. In this way, the combination strength of the partition plate 8 and the upper cover 11 is high, which can improve the service life of the partition plate 8. During the up and down movement of the load-bearing ring 5, the partition plate 8 plays a guiding and limiting role for the load-bearing ring 5.

[0032] The inner wall surface of the upper port of the through hole of the load-bearing ring 5 is provided with a first annular flange 54. The outer circumferential surface of the lower end of the lock core cylinder 31 is provided with a second annular flange 311. After the lock core cylinder 31 passes through the through hole of the load-bearing ring 5 from the lower port of the through hole of the load-bearing ring 5, the lower end surface of the first annular flange 54 contacts the upper end surface of the second annular flange 311. The lower end of the outer circumferential surface of the bottom cover 12 is provided with a plurality of first bumps 121 and a plurality of strip-shaped grooves 122, and the plurality of strip-shaped grooves 122 are located above the plurality of first bumps 121. The lower end of the inner wall surface of the upper cover 11 is provided with a plurality of notches 111 and a plurality of strip-shaped ribs 112. After the upper cover 11 and the bottom cover 12 are assembled, the notches 111 are inserted and matched with the corresponding first bumps 121, and the strip-shaped ribs 112 are in concave-convex fit with the corresponding strip-shaped grooves 122. The strip-shaped ribs 112 are arc-shaped ribs.

[0033] Embodiment 2: On the basis of Embodiment 1. The upper end surface of the bottom cover 12 is provided with a plurality of bumps 6, and the plurality of bumps 6 are circularly distributed. The upper end of the bottom cover 12 is provided with a lock core cylinder 31 through a spring 4. The upper end of the lock core cylinder 31 is provided with a plurality of lock core balls 33, and the lower end is provided with a load-bearing ring 5. The load-bearing ring 5 is located in the limit groove 14 surrounded by the plurality of bumps 6, and the diameter of the limit groove 14 matches the diameter of the load-bearing ring 5. The load-bearing ring 5 is provided with a plurality of limit blocks 52, and a partition slot 53 is provided between the limit blocks 52 and the corresponding load-bearing plates 51; the upper end surface of the bottom cover 12 is provided with a plurality of partition plates 8, and the partition plates 8 are located in the corresponding partition slots 53.

[0034] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2. A method for using a commodity protection device, Step 1, first place the commodity protection device locked with an anti-theft pin on a rotatable magnetic unlocking device. The rotatable magnetic unlocking device drives a plurality of steel balls 9 to roll from the bottom of the slope to the corresponding load-bearing plates 51 along their respective slopes through magnetic force. At this time, the magnetic force in the vertical direction in the magnetic unlocking device will simultaneously attract the plurality of steel balls 9. Under the action of gravity, the plurality of steel balls 9 drive the corresponding load-bearing ring 5, the lock core cylinder 31 and the plurality of lock core balls 33 to move downward together (the load-bearing ring 5 moves downward into the limit groove 14 surrounded by the plurality of arc-shaped bumps 6, and at the same time the load-bearing plate 51 moves downward into the corresponding gap 7). During the downward movement of the lock core cylinder 31, the spring 4 is compressed, and at the same time the anti-theft pin is unlocked; Step 2, after the anti-theft pin is pulled out, take the commodity protection device off the magnetic unlocking device. Under the action of the restoring force of the spring 4, the load-bearing ring 5, the lock core cylinder 31 and the plurality of lock core balls 33 move upward together and return to their original positions. At this time, the steel balls 9 will roll back to the bottom of the slope under the action of their own weight.

[0035] It should be understood that although the above embodiments have provided relatively detailed written descriptions of the design concept of the present invention, these written descriptions are only simple written descriptions of the design concept of the present invention, rather than limitations on the design concept of the present invention. Any combination, addition, or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A commodity protection device, comprising a housing (1), and a lock core member (3) for locking an anti-theft pin is arranged in the inner cavity of the housing (1), characterized in that: A load-bearing ring (5) is provided at the lower end of the lock cylinder column (31) in the lock cylinder member (3), and a plurality of load-bearing plates (51) are provided on the outer circumferential surface of the load-bearing ring (5). A plurality of bumps (6) are provided in the annular cavity between the outer circumferential wall surface of the load-bearing ring (5) and the inner circumferential wall surface of the housing (1), and the upper end surface of the bump (6) is a slope surface. A gap (7) is provided between two adjacent bumps (6), and the gap (7) is located below the corresponding load-bearing plate (51). A partition plate (8) is provided between the bump (6) and the load-bearing plate (51) on the slope bottom side of the bump (6), and a steel ball (9) is provided at the slope bottom of the bump (6). Under the action of an external force, the steel ball (9) can roll from the slope bottom to the corresponding load-bearing plate (51) along the slope; the lock cylinder member (3) is arranged in the inner cavity of the housing (1) through a spring (4); the lock cylinder column (31) and the load-bearing ring (5) are supported by the spring (4) and arranged on the bottom surface of the inner cavity of the housing (1); the upper end surface of the load-bearing plate (51) is an inclined surface, and the height of the lower side end of the load-bearing plate (51) matches the height of the slope top of the corresponding bump (6).

2. The commodity protection device according to claim 1, characterized in that: A through hole (13) that is mutually communicated with the inner cavity of the housing (1) is provided on the upper end surface of the housing (1), and the through hole (13) is located directly above the lock cylinder member (3). The height of the slope top of the bump (6) matches the height of the load-bearing plate (51) on the slope top side of the bump (6), and the bump (6) is an arc-shaped bump.

3. The commodity protection device according to claim 1, characterized in that: A spring limit insert block (10) or a spring limit slot is provided on the bottom surface of the inner cavity of the housing (1). The lower end head of the spring (4) is in plug-in fit with the spring limit insert block (10) or the spring limit slot, and the upper end head of the spring (4) is in contact with the lower end surface of the lock cylinder column (31).

4. A commodity protection device according to claim 1, characterized in that: A steel ball stop platform (61) is provided at the slope bottom of the bump (6).

5. The commodity protection device according to claim 1, characterized in that: The inner cavity of the housing (1) is in a "convex" shape, and a steel bowl (32) in the lock cylinder member (3) is provided in the narrow cavity in the upper part of the inner cavity. The outer wall surface of the steel bowl (32) is in interference fit with the inner wall surface of the narrow cavity.

6. A commodity protection device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: A plurality of bumps (6) are provided on the upper end surface of the bottom cover (12), and the plurality of bumps (6) are circularly distributed. The lock cylinder column (31) is provided on the upper end of the bottom cover (12) through a spring (4). A plurality of lock cylinder balls (33) are provided at the upper end of the lock cylinder column (31), and a load-bearing ring (5) is provided at the lower end. The load-bearing ring (5) is located in the limit groove (14) surrounded by the plurality of bumps (6), and the diameter of the limit groove (14) matches the diameter of the load-bearing ring (5). A plurality of limit blocks (52) are provided on the load-bearing ring (5), and a partition plate slot (53) is provided between the limit block (52) and the corresponding load-bearing plate (51); a plurality of partition plates (8) are provided on the inner circumferential wall surface of the upper cover (11). After the upper cover (11) and the bottom cover (12) are assembled, the plurality of partition plates (8) are inserted into the corresponding partition plate slots (53).

7. A commodity protection device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The upper end surface of the bottom cover (12) is provided with bumps (6) which are circularly distributed. The upper end of the bottom cover (12) is provided with a lock core cylinder (31) through a spring (4). The upper end of the lock core cylinder (31) is provided with a plurality of lock core balls (33), and the lower end is provided with a load-bearing ring (5). The load-bearing ring (5) is located in the limit groove (14) surrounded by a plurality of bumps (6), and the diameter of the limit groove (14) matches the diameter of the load-bearing ring (5). A plurality of limit blocks (52) are provided on the load-bearing ring (5), and a partition slot (53) is provided between the limit block (52) and the corresponding load-bearing plate (51); a plurality of partition plates (8) are provided on the upper end surface of the bottom cover (12), and the partition plates (8) are located in the corresponding partition slots (53).

8. The commodity protection device according to claim 1, characterized in that: The inner wall surface of the upper port of the through hole of the load-bearing ring (5) is provided with a first annular flange (54). The outer circumferential surface of the lower end of the lock core cylinder (31) is provided with a second annular flange (311). After the lock core cylinder (31) passes through the through hole of the load-bearing ring (5) from the lower port of the through hole of the load-bearing ring (5), the lower end surface of the first annular flange (54) contacts the upper end surface of the second annular flange (311).

9. A commodity protection device according to claim 1, characterized in that: The lower end of the outer circumferential surface of the bottom cover (12) is provided with a plurality of bumps one (121) and a plurality of strip-shaped grooves (122), and the plurality of strip-shaped grooves (122) are located above the plurality of bumps one (121). The lower end of the inner wall surface of the upper cover (11) is provided with a plurality of notches (111) and a plurality of strip-shaped ribs (112). After the upper cover (11) and the bottom cover (12) are assembled, the notches (111) are inserted and matched with the corresponding bumps one (121), and the strip-shaped ribs (112) are in concave-convex fit with the corresponding strip-shaped grooves (122).

10. The usage method of a commodity protection device according to any one of claims 1-9, characterized in that: Step 1: First, place the commodity protection device locked with the anti-theft pin on the rotatable magnetic unlocking device. The rotating magnetic unlocking device drives a plurality of steel balls (9) to roll from the bottom of the slope to the corresponding load-bearing plates (51) along their respective slopes through magnetic force. At this time, the magnetic force in the vertical direction in the magnetic unlocking device will simultaneously attract a plurality of steel balls (9). Under the action of gravity, the plurality of steel balls (9) drive the corresponding load-bearing ring (5), lock core cylinder (31) and a plurality of lock core balls (33) to move downward together. During the downward movement of the lock core cylinder (31), the spring (4) is compressed, and at the same time, the anti-theft pin is unlocked; Step 2: After the anti-theft pin is pulled out, take the commodity protection device off the magnetic unlocking device. Under the action of the restoring force of the spring (4), the load-bearing ring (5), lock core cylinder (31) and a plurality of lock core balls (33) move upward together and return to their original positions. At this time, the steel balls (9) will roll back to the bottom of the slope under the action of their own weight.

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