Fishing lures

Abstract

[Problem] The technical problem of this invention is to develop a lure that can accurately maintain the weight at the rear of the lure during casting, and can smoothly shift the weight back and forth after hitting the water. [Solution] The fishing lure 1 of the present invention is a fishing lure 1 having a magnetic weight 13 that can move in the front-rear direction within a lure body 10 that imitates a fish body, wherein a front holding magnet piece 15 for ensuring a swimming posture is fixedly positioned in front of the moving space 12 of the lure body 10, and a holding / returning structure 2 is provided behind the moving space 12, wherein an ejection action magnet piece 21 for casting stability is provided in an unfixed state that can move back and forth, and a return repulsion excitation magnet piece 22 that is magnetically attracted to the ejection action magnet piece 21 is provided at a position facing the moving space 12 in front of the casting position of the ejection action magnet piece 21.

Description

Technical Field

[0001] The present invention relates to a fishing lure, and more particularly to an improvement of a fishing lure that can set different center-of-gravity positions of the lure during casting when throwing the lure and during retrieval after hitting the water.

Background Art

[0002] Generally, a lure imitating a fish body has a line connected to its front part, i.e., near the head, and a plurality of hooks are provided below the abdomen or near the tail. Further, in the case of a type that dives or a type that swings slightly from side to side, in order to receive the water flow and cause these operations, a lip that protrudes downward and forward is provided below the head.

[0003] Such a lure preferably has its center of gravity located closer to the front because it takes a slightly downward underwater posture when diving. On the other hand, during casting, in order to stabilize the posture and gain flying distance, the center of gravity is preferably located closer to the rear (closer to the tail).

[0004] Therefore, many devices have been proposed to enable the weight to be moved within the lure body so that the preferred center-of-gravity position can be set for each, and to position the weight closer to the rear during casting and to hold the weight forward during retrieval. Most basically, a concave groove is provided in front of the lure body so that the weight can be positioned after hitting the water, or a magnetic body such as a steel ball is used as the weight, and a magnet piece for magnetically holding this closer to the front is arranged (see, for example, Patent Documents 1 and 2).

[0005] Incidentally, as a method for accurately holding the weight at the rear of the lure during casting, and then moving the weight back to the front of the lure after it hits the water to hold it there, a method has been proposed in which a magnetic piece or recessed pocket for weight retention is provided at the front of the lure, while a return spring that can push the weight back to a predetermined position is placed at the rear. (See Patent Document 3) However, with this method, when a lure is cast, the weight immediately acts as a strong load, or acceleration G, which compresses the rear return spring and positions the weight in the correct rear position. However, as the flight speed decreases, the acceleration G decreases, the force pushing it backward gradually diminishes, and the weight is pushed forward by the return spring, which always acts at a constant rate. As a result, the weight is not held in the optimal rear position inside the lure, and the stability of the lure during casting is compromised. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Patent No. 4472834 [Patent Document 2] Patent No. 3299184 [Patent Document 3] Japanese Patent Publication No. 2011-229423 [Overview of the project] [Problems that the invention aims to solve]

[0007] This invention was made based on consideration of such situations, and the technical challenge was to develop a fishing lure that can accurately maintain the weight at the rear of the lure's body during casting, and then smoothly shift the weight forward after hitting the water. [Means for solving the problem]

[0008] In other words, the fishing lure described in claim 1 is A fishing lure having a magnetic weight that can move freely in the front-to-back direction within a lure body that mimics a fish body, wherein a front-holding magnet piece for ensuring a swimming posture is fixedly positioned in front of the weight's movement space within the lure body, and a holding / returning structure is provided behind the movement space, wherein an ejection magnet piece for casting stability is provided in an unfixed state that can move back and forth, and a return repulsion excitation magnet piece that magnetically attracts and excites the ejection magnet piece is provided at a position facing the movement space in front of the ejection magnet piece's settling position during casting.

[0009] Furthermore, the fishing lure described in claim 2 is characterized in that, in addition to the above requirements, the critical angle θ at which the return repulsion begins due to the mutual magnetic attraction between the ejection magnet piece and the return repulsion excitation magnet piece is 3 to 12°.

[0010] Furthermore, the fishing lure described in claim 3 is characterized in that, in addition to the above requirements, the ejection magnet piece has its magnetic poles arranged such that the direction of its magnetic field lines is from the inside of the magnet piece toward the outer edge, or in the opposite direction. [Effects of the Invention]

[0011] The aforementioned problems are then addressed by means of the requirements described in each of these claims. First, according to the invention described in claim 1, during flight, the movable weight is securely held to the tail end, and the lure lands on the water with the tail end positioned downwards. Then, during the subsequent retrieval motion, at the moment when the head of the lure is slightly lowered from the horizontal due to the action of the lip, the ejection magnet piece and the return repulsion excitation magnet piece strongly attract each other, so that the weight can be powerfully propelled forward. Furthermore, the weight pushed forward is propelled to its front end by the magnetic force of the front-holding magnet piece positioned at the front, allowing the weight to move smoothly from the rear end to the front end of the movement space.

[0012] Furthermore, according to the invention described in claim 2, by setting the critical angle θ for the start of the return rebound to 3° to 12°, smooth weight transfer can be achieved immediately after the lure hits the water. This also makes it possible for the fishing lure to instantly transition to its intended predatory swimming action after hitting the water.

[0013] Furthermore, according to the invention of claim 3, the ejection magnet piece for casting stabilization is a neodymium magnet, and by setting the direction of the magnetic field lines from the inside of the magnet piece toward the outer edge, the size of the magnet can be reduced, and the entire holding and returning structure 2 can be compactly housed, thereby widening the range of applications for fishing lures. In addition, the weight of the magnet remaining near the tail can be reduced, so it does not affect the swimming action of the fishing lure that induces predation. [Brief explanation of the drawing]

[0014] [Figure 1] These are a side view and a front view showing a partially cut section of the fishing lure of the present invention. [Figure 2] The images show a perspective view (a) of the retaining piece and weight and their surrounding components, a rear view (b) and a longitudinal side view (c) of the retaining piece, and a longitudinal side view (d) showing the magnetic field lines of the magnet piece alone. [Figure 3] This is an explanatory diagram showing the arrangement of magnets in the holding and returning structure. [Figure 4-1] A side view showing the state of a fishing lure during flight from casting until it hits the water, with a portion of the view broken off. [Figure 4-2] A side view showing the state of a fishing lure upon impact with the water after casting, with a portion of it broken. [Figure 4-3] A partially fractured side view showing the state of a fishing lure immediately after it has exceeded the critical angle θ at which the return rebound begins following a retrieve. [Figure 4-4] A partially cutaway side view showing the swimming motion of a cast fishing lure after retrieval, which induces predation. [Modes for carrying out the invention]

[0015] Embodiments of the present invention take the following-described examples as examples of preferred embodiments, and also include various modified examples within the technical idea of the present invention.

Example

[0016] Hereinafter, the present invention will be specifically described based on the illustrated examples. Reference numeral 1 in the figure is a fishing lure of the present invention, which has an outer shape imitating a small fish. As an example, a hook H is attached to a hook eye 18 provided near the abdomen and the tail, and it is configured in this way. More specifically, as shown in FIG. 1, the fishing lure 1 includes a resin lure body 10 as its constituent member. This is mostly configured by combining body elements 10a and 10b that are divided left and right in a front view in a so-called butting manner as shown in FIG. 1(b).

[0017] Also, a line eye 19 is provided at the head of the lure body 10 shown in this example, and a lip 11 is formed so as to protrude forward and downward in a forwardly downward manner. Depending on the specifications of the fishing lure 1, a form of the lure body 10 without the lip 11 may be adopted. Here, the front and the rear refer to the head side of the lure body 10 imitating a fish body as the front and the tail side as the rear.

[0018] Furthermore, a hollow moving space 12 is formed inside the lure body 10, and a weight 13 is configured to be able to move along the longitudinal direction of the lure body 10 within this moving space 12. And inside the front side of this moving space 12, for example, inside a portion corresponding to the pectoral fin to the ventral fin of the lure body 10, a holding piece K capable of gently holding the forwardly moved weight 13 is provided. This holding piece K, as will be described in detail later, is composed of a front holding magnet piece 15 and a shielding cap 14.

[0019] In the embodiment shown in Figure 1, a guide core wire 12A is provided within the moving space 12 along its longitudinal direction, and a weight core hole 13A provided in the core of the weight 13 is supported so as to pass through the guide core wire 12A, allowing the weight 13 to move smoothly using the guide core wire 12A as a guide. Furthermore, in order to assemble the retaining piece K, guide core wire 12A, and cushion C to the lure body 10, as an example, ribs are provided in the moving space 12, and these ribs are used to position and hold these components.

[0020] In this embodiment, the front retaining magnet piece 15 is, for example, enclosed in a shielding cap 14 made of a soft magnetic material, thereby forming a so-called cap magnet. As shown in Figure 2, the shape of the shielding cap 14 covers the front side and periphery of the front retaining magnet piece 15, leaving the rear side open, and the front side of the front retaining magnet piece 15 is magnetically attached to the inside of the cap to enclose it. In this state, as shown in Figure 2(b), the dimensions are set so that a small gap p is formed between the inner circumference of the shielding cap 14 and the outer circumference of the front retaining magnet piece 15. With this configuration, as shown in Figure 2(c), magnetic field lines are concentrated in the narrow area between the exposed rear end surface of the front retaining magnet piece 15 and the rear end surface of the shielding cap 14 called the yoke, as indicated by the thick arrow, and as shown in Figure 2(d), an attractive force 3 to 4 times greater than that of the front retaining magnet piece 15 when used alone is obtained. Furthermore, a magnet core hole 15A is formed in the center of the front retaining magnet piece 15.

[0021] Here, we will describe the materials of the main components of the fishing lure 1 of the present invention. First, each of the aforementioned magnet pieces, namely the front holding magnet piece 15, the ejection magnet piece 21 (described later), and the return repulsion excitation magnet piece 22, may be, for example, ferrite magnets, but preferably rare earth magnets with 10 times or more magnetic force are used, and neodymium magnets, which are relatively inexpensive and have strong magnetic force, are particularly adopted. If there are no price or other constraints, other rare earth magnets such as samarium cobalt magnets, which have the next strongest magnetic force after neodymium magnets, may also be used. Furthermore, the shielding cap 14 is formed from a soft magnetic material with low coercivity and high permeability. Examples include iron or an alloy whose main component is iron (such as silicon steel, permalloy, sendust, or permendur). A magnet core hole 21A is formed in the center of the front ejection magnet piece 21.

[0022] Furthermore, the weight 13 is inevitably made of a high-density material that contains a ferromagnetic material, and tungsten is used as an example. High-purity tungsten (99.999% or higher) exhibits paramagnetism; while it shows slight magnetism when the front-holding magnet piece 15 is brought near, it does not become magnetized. However, the purity of ordinary tungsten obtained industrially is 99.95-99.99%, and it inevitably contains ferromagnetic (soft magnetic) materials such as iron, alkali metals, and radioactive elements, so it is attracted to strong rare-earth magnets. In addition to materials that inevitably contain ferromagnetic materials, the material of the weight 13 can also be a tungsten-based sintered alloy with tungsten as the main component and nickel, copper, iron, etc. as binders. Furthermore, it is possible to apply weight 13, which is primarily made of materials other than tungsten. Specifically, this would be weights primarily made of lead, for example. In this case as well, the front end of the weight 13 (the front head side of the lure) needs to be configured to be magnetically attached to the retaining piece K by placing a magnetic material thereon. For this reason, although not shown in the illustration, methods such as bonding a thin magnetic plate of metal or the like to the front end surface of the lead, or further embedding a magnetic metal piece on the front end side, can be applied. Of course, it goes without saying that other known methods that use lead as the main material while exhibiting magnetic attachment functionality can also be applied.

[0023] By constructing these components from such materials, the weight 13 is magnetically attached to the retaining piece K at the front of the lure body 10 and is loosely held in place by it. The term "loose holding" is used here because, as will be explained in more detail later, during casting, the weight 13 is released from the holding piece K and positioned towards the rear (tail) within the moving space 12. This operation can be performed with a slight rod action or within a series of casting movements, so a loose holding state is adopted rather than a rigid one.

[0024] On the other hand, the fishing lure 1, as shown in Figure 1, has a holding and return structure 2 located at the rear inside the lure body 10. This holding and returning structure 2 is provided behind the moving space 12, and first, the injection-acting magnet piece 21 for casting stabilization is provided on the guide core wire 12A in an unfixed state that allows it to move back and forth. Furthermore, a return-repulsion excitation magnet piece 22 is provided at a position facing the moving space 12 in front of the terminal position P1 where the ejection magnet piece 21 is housed during casting, and which mutually attracts the ejection magnet piece 21 with magnetic force. As shown in Figures 3(a) and 3(b), this return-repulsion excitation magnet piece 22 is provided inside a holding pocket 20a located on the ceiling (upper) side of the moving space 12, and is positioned so that the direction of the magnetic field lines is perpendicular to the longitudinal direction of the moving space. In this embodiment, the magnetic field lines are positioned perpendicular to the longitudinal direction of the moving space 12, but it is also acceptable to position them so that they are perpendicular to the longitudinal direction of the moving space 12.

[0025] The position directly below the holding pocket 20a, that is, the position where the ejection magnet piece 21 and the return repulsion excitation magnet piece 22 are most attracted to each other, is indicated as the starting position P0 of the ejection magnet piece 21, while the position when the ejection magnet piece 21 is at its rearmost end is indicated as the ending position P1 of the ejection magnet piece 21, as described above. Furthermore, cushions C made of an elastic material such as rubber are provided on both the front and back of the ejection magnet piece 21 to mitigate the impact during collisions. As a result of this configuration, during casting, the ejection magnet piece 21, together with the weight 13, is positioned at the rear of the lure body 10, i.e., at the terminal position P1. After hitting the water, the ejection magnet piece 21 moves forward as if attracted to the return repulsion excitation magnet piece 22, thereby pushing the weight 13 forward. Details of this action will be explained later when describing the rod action during casting or retrieval.

[0026] The fishing lure 1 of the present invention has the configuration described above, and is used by attaching a swivel S tied to the end of a line L to a line eye 19, and works as follows to obtain a center of gravity G position suitable for casting and retrieving, respectively.

[0027] First, before the angler begins the casting motion, the weight 13 may be positioned towards the rear of the moving space 12, at the very back (the imaginary line in Figure 3(b)), as shown in Figure 3, or it may be loosely held by the retaining piece K at the front end of the moving space 12, as shown in Figure 4-4. Even when the weight 13 is loosely held by the retaining piece K, the centrifugal force from the subsequent casting motion, or by applying slight rod action to the fishing lure 1 which is suspended in mid-air by the line L with the line eye 19 facing upwards, can result in the weight 13 being positioned at the rear end of the moving space 12. At the rear end of the moving space 12, the ejection magnet piece 21 is positioned to loosely hold the weight 13. Although described as "loosely held," depending on the specifications of the cushion C and the magnetic properties of the ejection magnet piece 21, the attractive force may not be present, and the weight may not be held.

[0028] Step 1: Immediately after casting (Figure 4-1) As shown in Figure 4-1, the fishing lure 1 cast in this manner flies with its tail facing forward. In this case, the weight 13 has its center of gravity G firmly located towards the tail, resulting in a stable flight posture and a sufficient desired flight distance. Looking at this state in more detail, when casting, the fishing lure 1 is subjected to a large centrifugal force, causing the weight 13 to move backward. At that time, in the movement space 12 slightly in front of the rearmost position, the ejection magnet piece 21 is attracted by the magnetic force of the return repulsion excitation magnet piece 22 located in the holding pocket 20a above it, and remains stationary at the starting position P0. Then, the weight 13 that has moved backward moves together with the stationary ejection magnet piece 21 to the rearmost position, pushing it to the terminal position P1. During this flight state, according to the law of inertia, weight 13 remains at the terminal position P1, which is the rearmost position. In other words, during this period, the mutual attractive force between the return repulsion excitation magnet piece 22 and the ejection action magnet piece 21, which are positioned within the aforementioned holding pocket 20a, is insufficient to push the weight 13 forward.

[0029] Step 2: Near the apex of the parabolic trajectory. Eventually, fishing lure 1 assumes a nearly horizontal position and transitions into free fall motion. Near this peak, that is, at the moment when it becomes horizontal, the weight of weight 13 does not act in the vertical direction, but due to frictional resistance between the guide core material 12A and weight 13, The weight 13 and the ejection magnet piece 21 remain in their set position without returning forward. In other words, the magnetic force constantly attracting the weight 13 between the return repulsion excitation magnet piece 22 and the ejection magnet piece 21, which are located within the retaining pocket 20a, is not enough to move the weight 13 forward, and the weight 13 continues to fly with the rear end side remaining almost unchanged from its set position during casting.

[0030] Step 3. Eventually, fishing lure 1 will freefall with its rear end pointing downwards. At this stage, as the fishing lure 1 falls with its rear end pointing downwards, the weight of the weight 13 acts vertically. In this state, where the weight of the weight 13 is concentrated downwards, the mutual attractive force due to the magnetic forces between the return repulsion excitation magnet piece 22 and the ejection action magnet piece 21, which are placed in the aforementioned holding pocket 20a, cannot move the weight 13 forward (upward, considering the posture of the lure 1). As a result, the lure 1 can continue to fly in a free fall manner with the weight 13 stably positioned towards the rear end.

[0031] Step 4: From water entry to the start of the retrieve operation (Figures 4-2, 4-3) Eventually, lure 1 will hit the water, but as shown in Figure 4-2, since the center of gravity G is located towards the tail, it will float with its tail submerged in the water. Of course, depending on the specifications of the lure, some may not float but slowly sink into the water, but in any case, at this point, fishing lure 1 will be facing downwards towards the tail. Next, the angler begins the retrieval motion, winding the line L and drawing in the fishing lure 1. This action causes the fishing lure 1 to transition from an upright position to an inclined position, and then to a horizontal position as shown in Figure 4-3. As the inclination becomes gentler, the weight 13's tendency to shift towards the rear end decreases. Furthermore, as the fishing lure 1 is drawn in, at the moment the head (tip) side is slightly lowered to a specific angle, a force F' is generated that causes the weight 13 to move towards the tip due to its own weight. Along with this force, the distance between the return repulsion excitation magnet piece 22 and the ejection magnet piece 21, which are placed in the retaining pocket 20a, decreases, and the mutual magnetic attraction force increases rapidly. As a result, the ejection magnet piece 21 moves from the terminal position P1 to the starting position P0 at a speed that can be described as instantaneous. Along with this movement, the weight 13 is subjected to an auxiliary force F, which is forcefully pushed towards the tip by the ejection magnet piece 21 on the rear side. It moves forward. Meanwhile, the ejection magnet piece 21, which pushed back the weight 13, reaches its closest position to the return repulsion excitation magnet piece 22, i.e., the starting position P0, where mutual attraction is maximum, and it remains held in that position. The weight 13, on the other hand, continues to move forward due to the inertial force caused by its own weight, and as a result, the loose holding state with the ejection magnet piece 21 is released, leaving the ejection magnet piece 21 behind at the starting position P0, and moves further forward.

[0032] This specific angle is referred to as the critical angle θ at which the rebound begins. In this embodiment, the critical angle θ at which the return rebound begins is preferably when the head side is approximately 3 to 6 degrees below the horizontal. Of course, it is also possible to set the magnet specifications, the arrangement of the magnets, the distance between the starting position P0 and the ending position P1, the weight of the weight 13, etc., so that the critical angle θ at which the return rebound begins can be set in a range of approximately 6 to 12 degrees.

[0033] Step 5. Loose holding state in the retaining part K (Figure 4-4) As the weight 13, which is forcefully pushed forward, approaches the retaining piece K at the front, the ferromagnetic material (soft magnetic material) contained in the weight 13 is excited by the neodymium magnet, which has a strong magnetic force. As a result, as shown in Figure 4-4, the weight 13 is magnetically attached to the retaining piece K and loosely held in place, and the position of the center of gravity G of the fishing lure 1 is located closer to the head than the longitudinal center of the lure body 10, causing the lure body 10 to maintain a posture that is slightly tilted forward.

[0034] Subsequently, the angler adds rod actions such as twitching and jerking in addition to retrieving, causing the fishing lure 1 to repeatedly undergo sudden changes in direction and speed. However, the loose holding state of the weight 13 to the retaining piece K is maintained, and the position of the center of gravity G is also preserved. Incidentally, even if an unexpected change in speed occurs and the loose holding state of the weight 13 by the retaining piece K is released, the action of the lip 11 accompanying the angler's rod action will cause the fishing lure 1 to dive and assume a forward-sloping posture, so the loose holding state of the weight 13 by the retaining piece K will be restored immediately.

[0035] [Other embodiments] The core of the present invention lies in selecting the balance between the mutual attractive force between the return repulsion excitation magnet piece 22 and the ejection action magnet piece 21, which are arranged in the holding pocket 20a, and the weight of the weight 13. Therefore, the arrangement of both magnets that always determine the attractive force (for example, the selection of the distance Df between the ejection magnet piece 21 and the return repulsion excitation magnet piece 22) is also important. As an example of a method for adjusting these, it is preferable to provide a through hole 20b in the wall separating the holding pocket 20a and the moving space 12, as shown in Figure 3(c), in order to apply more magnetic force. This increases the attractive force between the two magnets, which allows for an increase in the weight of weight 13, or an increase in the distance D between the starting position P0 and the ending position P1.

[0036] The specifications of each component in this embodiment are shown below. For example, if the length of fishing lure 1 is approximately 150mm to 200mm, The ejection magnet piece 21 is a neodymium magnet with a diameter of approximately 4-6 mm and a thickness of 2-4 mm, and its magnetic poles are arranged so that the direction of its magnetic field lines is from the inside of the magnet piece toward the outer edge, or vice versa. To explain the specific arrangement of magnetic poles, as an example, if we consider a magnet that is roughly coin-shaped as shown in Figure 2, then the arrangement shown in Figure 2(e) consists of one magnetic pole (shown as the south pole in the figure) surrounding the core hole 21A on both the front and back surfaces of the magnet, and the other magnetic pole (shown as the north pole in the figure) is arranged to surround it. Of course, it is also possible to arrange the magnet in a way that alternately reverses the polarity on the inside and the polarity on the outer edge, as shown in Figure 2(e2). Another configuration, shown in Figure 2(e3), involves a coin-shaped magnet with the same magnetic pole on both sides (for example, the south pole in the figure) and a different magnetic pole (for example, the north pole in the figure) on its outer surface. The other magnet piece 22 for return repulsion excitation is a neodymium magnet, with a diameter of approximately 4-6 mm and a thickness of 1-4 mm, and its magnetic poles are arranged so that the direction of its magnetic field lines is in the direction of its thickness. The furthest distance Df between the ejection magnet piece 21 and the return repulsion excitation magnet piece 22 is approximately 6 mm to 10 mm. The travel distance D of the ejection magnet piece 21 is approximately 6 to 8 mm. Weight 13 at this time is made of tungsten, with a diameter of approximately 4-8 mm and weighing approximately 6-10 g. Cushion C is an O-ring with a thickness of approximately 1.0 mm to 3.0 mm and a diameter of approximately 4-7 mm. [Explanation of symbols]

[0037] 1 Fishing lure 10 Lure Body 10a Body element 10b Body element 11 Lip 12 Mobile Space 12A Guide core wire 13 weights 13A Weight core hole 14. Shielding cap 15 Front holding magnet piece 15A magnet single core hole 18 Hook Eye 19 Line Eye 2. Retention and return structure 20a Retaining pocket 20b Through hole 21 Injection magnet piece 21A magnet single core hole 22 Magnetic piece for return repulsion excitation 22A magnet single core hole C Cushion D (the distance the ejection magnet piece moves) Df (distance between magnets in the holding / returning structure) F (Auxiliary action due to injection) F' (action due to self-weight) G center of gravity H hook K Holding piece L Line P0 (Starting position of the ejection magnet piece) P1 (End position of the ejection magnet piece) p gap S Swivel

Claims

1. A fishing lure having a magnetic weight that can move freely in the front-to-back direction within a lure body that mimics a fish body, wherein a front-holding magnet piece for ensuring a swimming posture is fixedly positioned in front of the weight's movement space within the lure body, and a holding / returning structure is provided behind the movement space, wherein an ejection magnet piece for returning the weight to its position is provided in an unfixed state that can move back and forth, and a return repulsion excitation magnet piece that mutually attracts the ejection magnet piece magnetically is provided at a position facing the movement space in front of the ejection magnet piece's settling position during casting.

2. The fishing lure according to claim 1, characterized in that the critical angle θ at which the return repulsion begins due to the mutual magnetic attraction between the ejection magnet piece and the return repulsion excitation magnet piece is 3 to 12°.

3. The fishing lure according to claim 1 or 2, characterized in that the ejection magnet piece has magnetic poles arranged such that the direction of its magnetic field lines is from the inside of the magnet piece toward the outer edge, or in the opposite direction.

Images